KR102396434B1 - Two-fluid nozzle for cleaning substrate - Google Patents

Abstract

The present invention relates to a two-fluid nozzle for cleaning a substrate that sprays droplets of a mixture of a liquid and a gas on the surface of a substrate. In particular, a gas flowing into a gas inlet from a chamber provided inside the two-fluid nozzle for cleaning a substrate to form a stable flow pressure and flow, and accordingly. The flow pressure of the gas discharged to the gas outlet is stabilized and the flow rate of the gas is increased, thereby generating a strong collision between the gas and the liquid. It relates to a two-fluid nozzle.

Description

Two-fluid nozzle for substrate cleaning {TWO-FLUID NOZZLE FOR CLEANING SUBSTRATE}

The present invention relates to a two-fluid nozzle for cleaning a substrate that sprays droplets of a mixture of liquid and gas on the surface of a substrate.

Various processes such as photolithography, etching, and thin film deposition are performed on a substrate used for manufacturing a semiconductor chip, an LED chip, and the like.

As described above, foreign substances such as particles are generated in the process of performing various processes on the substrate, and in order to remove these foreign substances, a process of cleaning the substrate is performed before or after each process is performed.

As a method of cleaning a substrate, there is a method of generating droplets of the mixture produced by mixing a liquid and a gas serving as a treatment liquid (cleaning liquid), and causing the droplets to collide with the surface of the substrate to be treated. Such a method may be performed by a two-fluid nozzle for generating and spraying droplets of a mixture of a liquid and a gas, which are the treatment liquids.

Patents for the two-fluid nozzle for cleaning the substrate described above include Korean Patent No. 10-0663133 (hereinafter referred to as 'Patent Document 1') and Korean Patent No. 10-1582248 (hereinafter referred to as 'Patent Document 2'). ) is known.

In the substrate processing apparatus of Patent Document 1, the nitrogen gas pipe communicates with the cylindrical flow path, nitrogen gas is supplied to the cylindrical flow path through the nitrogen gas pipe, and then, when discharged from the gas outlet, it collides with the deionized water discharged from the treatment liquid outlet and mixes , to create droplets. The nitrogen gas is rotated spirally through the spiral groove before being discharged through the gas outlet, and then discharged.

In the case of the substrate processing apparatus of Patent Document 1, since nitrogen gas flows from a nitrogen gas pipe having a relatively small area to a cylindrical flow path having a relatively large area, a constant flow of nitrogen gas occurs in the upper region of the cylindrical flow path. Without it, the gas simply flows in a downward direction.

Accordingly, when nitrogen gas is discharged to the outside through the gas discharge port, the flow rate of the gas is low, and thus, the speed of droplets generated by the collision of the gas and the liquid is also relatively low.

Furthermore, even if nitrogen gas is spirally rotated through the groove provided in the lower region of the cylindrical flow path, there is no constant flow flow of nitrogen gas in most regions of the cylindrical flow path, so even if the nitrogen gas is spirally rotated through the groove, The flow rate of nitrogen gas is not significantly increased, which may cause droplet velocity to decrease.

Even in the case of Patent Document 2, the gas inlet simply communicates with the gas flow path, so that the problems of Patent Document 1 described above occur.

As described above, conventional two-fluid nozzles for cleaning substrates do not have a separate configuration for increasing the flow rate of gas in the upper section of the chamber except for the spiral section at the bottom of the chamber when the gas flows into the chamber. , the flow rate of the gas is not increased, and due to this, there is a problem that the flow rate of the gas is low when the gas is discharged to the outside. Therefore, there is a need to develop a two-fluid nozzle for cleaning a substrate that discharges gas at a high flow rate.

Korean Patent Registration No. 10-0663133 Korean Patent No. 10-1582248

The present invention has been devised to solve the above problem, and forms a stable flow pressure and flow by inducing a gas flowing into a gas inlet from a chamber provided inside a two-fluid nozzle for cleaning a substrate, and thus, a stable flow pressure and flow. The flow pressure of the gas discharged to the gas outlet is stabilized and the flow rate of the gas is increased, thereby generating a strong collision between the gas and the liquid. It aims to provide a two-fluid nozzle.

A two-fluid nozzle for cleaning a substrate according to one aspect of the present invention is disposed inside the first chamber so as to have a first chamber in which a gas flows, and a central axis of the first chamber and the same as that of the first chamber. a body provided with a second chamber communicating with the first chamber; a first gas supply unit communicating with the first chamber to supply gas to the first chamber; a liquid supply part having the same central axis as the central axis of the body, at least a portion of which is disposed in the second chamber, and having a liquid discharge port at an end thereof; and a gas discharge port communicating with a lower portion of the second chamber and having a ring shape to surround the liquid discharge port, wherein the second chamber is disposed in the first chamber by a partition wall disposed inside the first chamber. formed therein, the opened upper part of the second chamber communicates with the upper part of the first chamber, and the supply pressure of the gas supplied by the first gas supply unit does not affect the flow inside the second chamber The opened upper part of the second chamber, which is a communication section between the first chamber and the second chamber, is located above the first gas supply part, and when the gas is supplied to the first chamber by the first gas supply part, the After the gas is filled in the first chamber by the partition wall, it flows into the second chamber through the open upper part of the second chamber, and the gas flowing into the second chamber is discharged to the gas outlet It is characterized in that it collides with the liquid discharged by the liquid discharge port to generate droplets of the mixture.

In addition, the first gas supply unit is characterized in that it is arranged eccentrically to one side from the central axis of the body.

The method further includes a spiral portion provided under the liquid supply unit to be disposed in the second chamber and having a plurality of spiral passages communicating with the gas outlet, wherein the spiral direction of the plurality of spiral passages is in the first direction. It is characterized in that the gas supplied to the first chamber through the gas supply unit is formed in the same direction as the spiral rotation in the first chamber.

In addition, one side of the inner wall of the first gas supply unit and one side of the inner wall of the first chamber are inclinedly connected so that a step does not occur between one side of the inner wall of the first gas supply unit and one side of the inner wall of the chamber communicating with one side of the inner wall of the first gas supply unit It is characterized in that a 1-1 guide part is provided.

In addition, the 1-1 guide portion is characterized in that it has a curvature.

In addition, the first gas supply unit may include first and second guide portions inclined in one direction of the first gas supply unit such that a cross-sectional area of the first gas supply unit becomes narrower toward the first chamber.

In addition, the second gas supply unit is eccentric from the central axis of the body to the other side communicating with the first chamber; characterized in that it further comprises.

In addition, the first gas supply unit includes first and second guide portions inclined in one direction of the first gas supply unit, so that the cross-sectional area of the first gas supply unit becomes narrower toward the first chamber, and the second gas supply unit is provided. The part is characterized in that the second gas supply part is provided with a 2-2 guide part inclined in the other direction of the second gas supply part, so that the cross-sectional area of the second gas supply part becomes narrower toward the first chamber.

In addition, a curved portion is formed at the upper end of the partition wall so that the gas is smoothly guided when the gas flows into the open upper part of the second chamber, which is a communication section between the first chamber and the second chamber. .

In addition, the body is made of a combination of the upper body and the lower body, the liquid supply part is formed to protrude downward from the flange of the upper body, and the gas is a communication section between the first chamber and the second chamber A ring-shaped curved groove corresponding to the position of the curved portion is formed on the lower surface of the flange so that the gas is smoothly guided when flowing into the open upper portion of the second chamber.

According to the two-fluid nozzle for cleaning a substrate of the present invention as described above, the following effects are obtained.

As a pressure difference is generated between the first chamber and the second chamber separated from each other by the partition wall, the gas is accelerated in the communication section between the first chamber and the second chamber and flows into the second chamber. Accordingly, under the same conditions, the pressure and flow rate of the gas discharged to the gas outlet are higher than those of the conventional two-fluid nozzle for cleaning substrates, so that droplets of a mixture having a higher speed and fine particles can be generated.

Since the first chamber and the second chamber are formed by the barrier rib structure, it is possible to effectively prevent the discharge pressure from being reduced by the direction vector of the supply pressure of the first gas supply unit and the second gas supply unit.

As the first gas supply unit and the second gas supply unit have an eccentric structure, the gas rotates clockwise or counterclockwise inside the first and second chambers to perform a helical rotational flow, and through this, the gas flow pressure loss can be minimized.

The 1-1 guide part and the 2-1 guide part are provided so that the gas smoothly flows along the inner wall of the first gas supply unit and the inner wall of the first chamber, and the inner wall of the second gas supply unit and the inner wall of the first chamber can flow smoothly. Accordingly, by flowing into the first chamber while maintaining the high-pressure and high-speed state due to the Coanda effect, it is possible to minimize the decrease in the flow rate and the loss of the flow pressure.

The 1-2 guide part serves to guide the gas supplied through the first gas supply part to the inner wall in one direction of the first gas supply part and the inner wall in one direction of the first chamber, and the second guide part is to guide the gas supplied through the first gas supply part in one direction. The function of guiding the gas supplied through the second gas supply unit to the inner wall in the other direction and the inner wall in the other direction of the first chamber, thereby maximizing the Coanda effect of the gas flowing along the inner wall. Accordingly, in addition to the eccentric structure of the first gas supply unit and the second gas supply unit, it is possible to further maximize the helical rotational flow of the gas inside the first chamber.

As the gas helically rotates along the inner wall of the first chamber, it is possible to minimize a decrease in the flow rate and a loss in flow pressure of the gas caused by the collision of the gas with the liquid supply unit.

The gas flowing into the second chamber flows along the plurality of spiral flow paths and then is discharged to the gas outlet, so that the flow rate of the gas discharged from the gas outlet increases, thereby colliding with the liquid at a high flow rate. Therefore, the velocity of the droplets of the mixture generated by the collision of the liquid and the gas can be sprayed while maintaining a high velocity.

Since the gas outlet is provided to surround the periphery of the liquid outlet and has a ring shape, when the gas is discharged, it may be discharged to the outside while maintaining a high flow rate due to the spiral rotational flow.

As the partition wall dividing the first chamber and the second chamber exists, the flow velocity of the gas is accelerated in the communication section between the first chamber and the second chamber and the communication section between the second chamber and the plurality of spiral flow paths, that is, in the two sections. Accordingly, effective spiral rotational flow is achieved in each of the first chamber, the second chamber, and the plurality of spiral passages, and through this, when gas is discharged through the gas outlet, high pressure and high speed are maintained can be ejected. Therefore, higher pressure and higher speed of gas than the conventional two-fluid nozzle for cleaning substrates is discharged, and through this, droplets of a mixture having a higher speed and fine particles can be generated.

By guiding the gas flowing into the inside of the second chamber from the first chamber through the curved portion and the curved groove, it is possible to smoothly flow the gas into the second chamber, and through this, the gas inside the second chamber It is possible to maintain a high flow rate and at the same time maintain a high gas discharge pressure.

1 is a perspective view of a two-fluid nozzle for cleaning a substrate according to a preferred embodiment of the present invention;
Figure 2 is an exploded perspective view of Figure 1;
Fig. 3 is a cross-sectional view taken along line A-A' of Fig. 1;
Fig. 4 is a cross-sectional view taken along line C-C' of Fig. 2;
Fig. 5 is a perspective cross-sectional view taken along line D-D' of Fig. 2;
Fig. 6 is a cross-sectional view taken along line B-B' of Fig. 1;
7 is a view showing the flow of gas and liquid in a two-fluid nozzle for cleaning a substrate according to a preferred embodiment of the present invention.
8A is a diagram illustrating a flow pressure distribution of a gas inside a chamber in a cross-sectional view viewed from the side of a chamber of a conventional two-fluid nozzle for cleaning a substrate;
8B is a diagram illustrating a flow pressure distribution of a gas in a sectional view from the top of the chamber of a conventional two-fluid nozzle for cleaning a substrate.
FIG. 8C is a diagram illustrating a flow pressure distribution of a gas inside a chamber in a cross-sectional view viewed from the top of a spiral part of a chamber of a conventional two-fluid nozzle for cleaning a substrate; FIG.
9A is a diagram illustrating a flow pressure distribution of a gas inside the first chamber in a cross-sectional view viewed from the side of the first chamber of the two-fluid nozzle for cleaning a substrate according to a preferred embodiment of the present invention.
9B is a diagram illustrating a flow pressure distribution of a gas inside the first chamber in a cross-sectional view viewed from the top of the first chamber of the two-fluid nozzle for cleaning a substrate according to a preferred embodiment of the present invention.
FIG. 9C is a diagram illustrating flow pressure distribution of the gas inside the second chamber and the spiral in a cross-sectional view from the top of the spiral part of the two-fluid nozzle for cleaning a substrate according to a preferred embodiment of the present invention.
10 is a view showing a modified example of the two-fluid nozzle for cleaning a substrate of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the detailed description below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein, and may be embodied in different forms. Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, 'comprises' and/or 'comprising' means that a referenced component, step, operation and/or element is the presence of one or more other components, steps, operations and/or elements. or addition is not excluded.

In addition, since it is according to a preferred embodiment, reference signs provided in the order of description are not necessarily limited to the order.

Further, the embodiments described herein will be described with reference to cross-sectional and/or plan views, which are ideal exemplary views of the present invention. In the drawings, thicknesses of films and regions are exaggerated for effective description of technical content. Accordingly, the form of the exemplary figure may be modified due to manufacturing technology and/or tolerance. Accordingly, embodiments of the present invention are not limited to the specific form shown, but also include changes in the form generated according to the manufacturing process. Accordingly, the regions illustrated in the drawings have a schematic nature, and the shapes of the illustrated regions in the drawings are intended to illustrate specific shapes of regions of the device and not to limit the scope of the invention.

In describing various embodiments, components performing the same function will be given the same names and the same reference numbers for convenience even if the embodiments are different. In addition, configurations and operations already described in other embodiments will be omitted for convenience.

Hereinafter, a two-fluid nozzle 10 for cleaning a substrate according to a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 7 .

1 is a perspective view of a two-fluid nozzle for cleaning a substrate according to a preferred embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1 , FIG. 3 is a cross-sectional view taken along line A-A' of FIG. 1 , and FIG. 4 is FIG. 2 is a cross-sectional view taken along line C-C', FIG. 5 is a cross-sectional perspective view taken along line D-D' of FIG. 2, FIG. 6 is a cross-sectional view taken along line B-B' of FIG. 1, and FIG. 7 is a substrate according to a preferred embodiment of the present invention. It is a diagram showing the flow of gas and liquid of a two-fluid nozzle for cleaning.

As shown in FIGS. 1 to 7 , the two-fluid nozzle 10 for cleaning a substrate according to an exemplary embodiment of the present invention includes a first chamber 310 in which gas flows, and a first chamber 310 . A body 100 provided with a second chamber 330 communicating with the body 100; and a first gas supply unit 700 communicating with the first chamber 310 and supplying gas to the first chamber 310; and the body The second gas supply unit 800 is eccentric from the central axis of 100 to the other side and communicates with the first chamber 310; and has the same central axis as the central axis of the body 100, at least a portion of the second A liquid supply unit 500 disposed in the chamber 330 and provided with a liquid outlet 510 at an end thereof; and a gas outlet communicating with the second chamber 330 and disposed to surround the liquid outlet 510 ( Includes; can be configured.

In the two-fluid nozzle 10 for cleaning a substrate, the body 100 is connected by a nozzle driver (not shown) to be positioned above the wafer (not shown).

The nozzle driver supports the two-fluid nozzle 10 for cleaning the substrate so that the vertical and longitudinal direction of the two-fluid nozzle 10 for cleaning the substrate is perpendicular to the upper surface of the wafer (not shown). The two-fluid nozzle 10 for cleaning the substrate is moved on the wafer.

The liquid supply unit 500 of the two-fluid nozzle 10 for cleaning the substrate communicates with an external liquid supply unit (not shown) to receive liquid from the external liquid supply unit.

The first gas supply unit 700 of the two-fluid nozzle 10 for cleaning the substrate communicates with an external gas supply unit (not shown) to receive gas from the external gas supply unit.

The body 100 forms the outer shape of the two-fluid nozzle 10 for cleaning the substrate. Accordingly, the central axis of the body 100 is the same as the central axis of the two-fluid nozzle 10 for cleaning the substrate.

A first chamber 310 in which gas flows and a second chamber 330 communicating with the first chamber 310 are formed inside the body 100 .

As shown in FIG. 2 , the body 100 may be formed by combining the upper body 110 and the lower body 130 .

The upper body 110 is provided with a flange 111 and a liquid supply unit 500 , and the liquid supply unit 500 is formed to protrude downward from the flange 111 . A spiral part 900 is provided under the liquid supply part 500 .

The lower body 130 is provided with a first gas supply unit 700 and a second gas supply unit 800 that communicate with the first chamber 310 .

The lower portion of the lower body 130 is provided with a spraying portion 131 protruding in the lower direction.

A hole 133 is formed in the center of the ejection unit 131 , and a liquid discharge port 510 is disposed in the center of the hole 133 .

A space between the injection unit 131 and the end of the liquid supply unit 500 is a gas discharge port 331 .

The ejection unit 131 is formed to have a smaller space in the lower direction, and through this, the gas outlet 331 may be disposed to surround the liquid outlet 510 at a distance close to the liquid outlet 510 . The inner space of the injection unit 131 is a lower region of the second chamber 330 .

A first chamber 310 opened upwardly is formed in the lower body 130 .

The first chamber 310 is formed inside the body 100 , specifically, the lower body 130 , and communicates with the first gas supply unit 700 and the second gas supply unit 800 , and the first gas supply unit 700 . and a space through which the gas supplied from the second gas supply unit 800 flows.

Inside the first chamber 310 , a partition wall 135 extending in an upper direction of the lower body 130 and protruding, the upper part of which is opened, is formed. The second chamber 330 is formed by the partition wall 135 .

The second chamber 330 provides a space in which a part of the liquid supply part 500 and the spiral part 900 are accommodated.

The second chamber 330 communicates with the first chamber 310 . In detail, the second chamber 330 is formed inside the first chamber 310 by the partition wall 135 disposed inside the first chamber 310 , and the opened upper part of the second chamber 330 is It communicates with the first chamber 310 .

At least a portion of the liquid supply unit 500 is inserted into the second chamber 330 .

A spiral portion 900 is inserted into the second chamber 330 .

The first chamber 310 has a circular cross-section, and the second chamber 330 also has a circular cross-section.

The second chamber 330 is disposed in the first chamber 310 , and in this case, the central axis of the first chamber 310 and the central axis of the second chamber are identical to each other.

The opened upper portion of the second chamber 330 is located above the first gas supply unit 700 and the second gas supply unit 800 .

As described above, the body 100 may be formed by a combination of the upper body 110 and the lower body 130 , and when the upper body 110 and the lower body 130 are coupled as described above, the first chamber 310 ) and the second chamber 330 have a space closed from the outside, through which gas may flow in the first chamber 310 and the second chamber 330 .

The cross-sectional area of the first chamber 310 is larger than that of the second chamber 330 .

The cross-sectional area of the second chamber 330 is narrower than the cross-sectional area of the first chamber 310, and the cross-sectional area of the body ( 100) is formed to be inclined in the direction of the central axis.

A lower portion of the second chamber 330 communicates with the gas outlet 331 .

The spiral part 900 is inserted and accommodated in the second chamber 330 .

The first gas supply unit 700 , the second gas supply unit 800 , the first chamber 310 , the second chamber 330 , and the plurality of spiral flow paths 910 and the gas outlet 331 of the spiral unit 900 are communicate with each other Accordingly, the gas introduced into the first chamber 310 through the first gas supply unit 700 and the second gas supply unit 800 passes through the second chamber 330 and the spiral unit 900 to the gas outlet 331 . will be discharged

The first gas supply unit 700 communicates with the front of the first chamber 310 to supply gas to the first chamber 310 . In this case, the first gas supply unit 700 is disposed eccentrically to one side from the central axis of the body 100 .

The second gas supply unit 800 communicates with the rear of the first chamber 310 to supply gas to the first chamber 310 . In this case, the second gas supply unit 800 is disposed eccentrically from the central axis of the body 100 to the other side.

As described above, as the second gas supply unit 800 is disposed eccentrically from the central axis of the body 100 to the other side at the rear of the first chamber 310 , the second gas supply unit 800 is the body 100 . It is symmetrical with the first gas supply unit 700 in a diagonal direction with respect to the central axis of the .

The first gas supply unit 700 is disposed eccentrically to one side from the central axis of the body 100 , and communicates with the front of the first chamber 310 , and the second gas supply unit 800 is located along the central axis of the body 100 . When the gas is supplied to the first chamber 310 through the first gas supply unit 700 and the second gas supply unit 800 as it communicates with the rear of the first chamber 310 and is arranged eccentrically from the other side, The gas rotates spirally along the inner wall of the first chamber 310 inside the first chamber 310 .

1 to 7 , as one embodiment, the first gas supply unit 700 is eccentrically disposed to the right from the central axis of the body 100 in front of the first chamber 310 , and the second gas supply unit 800 ) is disposed eccentrically to the left from the central axis of the body 100 at the rear of the first chamber 310, the first chamber 310 through the first gas supply unit 700 and the second gas supply unit 800 When the gas is supplied to the furnace, as shown in FIG. 6 , when viewed from the top of the first chamber 310 , the gas flows along the inner wall of the first chamber 310 in a clockwise direction inside the first chamber 310 . rotates in a spiral.

In the first gas supply unit 700 , the inner wall of the first gas supply unit 700 is provided so that a step does not occur between one side of the inner wall of the first chamber 310 communicating with one side of the inner wall of the first gas supply unit 700 . A first-first guide part 710 is provided to obliquely connect one side and one side of the inner wall of the first chamber 310 .

In the second gas supply unit 800, the inner wall of the second gas supply unit 800 is provided so that a step does not occur between the other side of the inner wall of the first chamber 310 communicating with the other side of the inner wall of the second gas supply unit 800. A 2-1 guide part 810 is provided to obliquely connect the other side to the other side of the inner wall of the first chamber 310 .

In the above example, the first-first guide part 710 is the first gas supply part so that a step does not occur between the right side of the inner wall of the first gas supply part 700 and the right side of the inner wall of the first chamber 310 communicating with the first gas supply part 700 . The right side of the inner wall of 700 and the right side of the inner wall of the first chamber 310 are inclinedly connected. In addition, the 2-1 guide part 810 prevents a step from occurring between the left side of the inner wall of the first chamber 310 and the left side of the inner wall of the first chamber 310 communicating with the left side of the inner wall of the second gas supply unit 800 . The left side of the inner wall of the second gas supply unit 800 and the left side of the inner wall of the first chamber 310 are inclinedly connected.

The first-first guide part 710 may be formed to have a curvature, and the curvature may be formed to be convex outwardly of the first chamber 310 to correspond to the shape of the inner wall of the first chamber 310 . . The second-first guide part 810 may also be formed to have a curvature, and the curvature may be formed to be convex outwardly of the first chamber 310 to correspond to the shape of the inner wall of the first chamber 310 . .

The first-first guide part 710 may be formed on at least one of one side (or the right side) of the inner wall of the first gas supply unit 700 and one side (or the right side) of the inner wall of the first chamber 310 .

The 2-1 guide part 810 may be formed on at least one of the other side (or the left side) of the inner wall of the second gas supply unit 800 and the other side (or the left side) of the inner wall of the first chamber 310 .

As described above, as the 1-1 guide part 710 and the 2-1 guide part 810 are formed, the first chamber 310 is passed through the first gas supply part 700 and the second gas supply part 800, respectively. ), the gas supplied to it can flow smoothly.

In detail, the gas supplied to the first gas supply unit 700 flows along one side of the inner wall of the first gas supply unit 700 and is guided by the 1-1 guide unit 710 , and then the first chamber It flows along one side of the inner wall of 310 . In this case, since a step is not generated between one side of the inner wall of the first gas supply unit 700 and one side of the inner wall of the first chamber 310 by the 1-1 guide unit 710 , the gas is subjected to a pressure gradient (Pressure). Gradient), the gas is supplied into the first chamber 310 in a state in which a decrease in its flow velocity is minimized due to the Coanda effect, which is a phenomenon in which gas is attached to and flows toward the inner wall. Accordingly, the gas supplied from the first gas supply unit 700 may flow into the first chamber 310 while maintaining a high pressure and high speed state.

Even in the case of the gas supplied to the second gas supply unit 800 , it flows along one side of the inner wall of the second gas supply unit 800 , and is guided by the 2-1 guide unit 810 , and then in the first chamber 310 . ) flows along one side of the inner wall. In this case, since a step is not generated between the other side of the inner wall of the eighth gas supply unit 800 and the other side of the inner wall of the first chamber 310 by the 2-1 guide unit 810 , the gas has a pressure gradient (Pressure). Gradient), the gas is supplied into the first chamber 310 in a state in which a decrease in its flow velocity is minimized due to the Coanda effect, which is a phenomenon in which gas is attached to and flows toward the inner wall. Accordingly, the gas supplied from the second gas supply unit 800 may flow into the first chamber 310 while maintaining a high-pressure and high-speed state.

The first gas supply unit 700 includes a 1-2 guide unit 730 inclined toward one side of the first gas supply unit 700 toward the first chamber 310 on the other side of the first gas supply unit 700 . It may be provided so that the cross-sectional area of the first gas supply unit 700 becomes narrower toward the first chamber 310 . In this case, the 1-2 guide part 730 is formed on the other side of the first gas supply part 700 .

The 1-2 guide part 730 is formed to be inclined toward one side of the first gas supply part 700 toward the first chamber 310 .

As shown in FIG. 6 , when the first gas supply unit 700 is eccentric from the central axis of the body 100 to the right and communicates with the front of the first chamber 310 , the front of the first chamber 310 . In FIG. 1 , the first-second guide part 730 is formed on the left side of the first gas supply part 700 .

In addition, the first and second guide parts 730 are inclined toward the right side of the first gas supply part 700 toward the first chamber 310 .

As described above, as the 1-2 guide part 730 is provided in the first gas supply part 700 , the cross-sectional area of the first gas supply part 700 becomes narrower toward the first chamber 310 .

The 1-2 guide unit 730 serves to guide the gas supplied through the first gas supply unit 700 in one direction, that is, in the right direction.

Therefore, the gas supplied to the first gas supply unit 700 is guided by the 1-2 guide unit 730 and guided to the inner wall (or the inner wall in the right direction) of the first gas supply unit 700 in one direction, and then flows. , flows to the inner wall (or the inner wall in the right direction) of the first chamber 310 through the 1-1 guide part 710 .

As described above, the 1-2 guide part 730 may be formed on the other side of the first gas supply part 700 , and may be formed in a communication section between the first gas supply part 700 and the first chamber 310 . It may be provided as a part of the inner wall forming the chamber 310 .

Also, the first and second guide portions 730 may be formed to have a curvature.

The second gas supply unit 800 includes a 2-2 guide unit 830 inclined toward the other side of the second gas supply unit 800 toward the first chamber 310 on one side of the second gas supply unit 800 . It may be provided so that the cross-sectional area of the second gas supply unit 800 becomes narrower toward the first chamber 310 . In this case, the 2-2 guide part 830 is formed on one side of the second gas supply part 800 .

The second-second guide part 830 is formed to be inclined toward the other side of the second gas supply part 800 toward the first chamber 310 .

As shown in FIG. 6 , when the second gas supply part 800 is eccentric from the central axis of the body 100 to the left and communicates with the rear of the first chamber 310 , the second-second guide part 830 ) is formed on the right side of the second gas supply unit 800 at the rear of the first chamber 310 .

In addition, the first and second guide parts 730 are inclined toward the left side of the second gas supply part 800 toward the first chamber 310 .

As described above, as the 2-2 guide part 830 is provided in the second gas supply part 800 , the cross-sectional area of the second gas supply part 800 becomes narrower toward the first chamber 310 .

The 2-2 guide unit 830 serves to guide the gas supplied through the second gas supply unit 800 in the other direction, that is, in the left direction.

Therefore, the gas supplied to the second gas supply unit 800 is guided by the 2-2 guide unit 830 and guided to the other side inner wall (or left side inner wall) of the second gas supply unit 800 and then flows. , flows to the other side inner wall (or left side inner wall) of the first chamber 310 through the second-first guide part 810 .

As described above, the 2-2 guide unit 830 may be formed on the other side of the second gas supply unit 800 , and may be formed in a communication section between the second gas supply unit 800 and the first chamber 310 . It may be provided as a part of the inner wall forming the chamber 310 .

Also, the second-second guide part 830 may be formed to have a curvature.

As described above, as the 1-2 guide part 730 is formed in the first gas supply part 700 and the 2-2 guide part is formed in the second gas supply part 800 , the first chamber 310 is formed. The helical rotation of the gas within is made more effective.

In detail, due to the eccentric structure of the first gas supply unit 700 and the second gas supply unit 700 , the gas flows along the inner wall of the first chamber 310 , thereby spiraling inside the first chamber 310 . The rotational flow is performed, and the 1-2 guide part 730 transfers the gas supplied through the first gas supply part 700 to the inner wall of the first gas supply part 700 in one direction and the first chamber 310 in one direction. It functions to guide the inner wall, and the 2-2 guide part 830 guides the gas supplied through the second gas supply part 800 to the other side of the inner wall of the second gas supply part 800 and the first chamber 310 . By serving as a guide to be drawn toward the inner wall in the other direction, the Coanda effect of the gas flowing along the inner wall is maximized. Accordingly, it functions to further maximize the helical rotational flow of gas inside the first chamber 310 together with the eccentric structure of the first gas supply unit 700 and the second gas supply unit 800 .

The liquid supply unit 500 has the same central axis as the central axis of the body 100 , is disposed in the second chamber 330 , and has a liquid discharge port 510 at an end thereof.

The liquid supply part 500 is formed to protrude downward from the flange 111 of the upper body 110 , and a spiral part 900 is provided at an end of the liquid supply part 500 .

The central axis of the liquid supply unit 500 has the same central axis as the central axis of the body 100 and the central axis of the two-fluid nozzle 10 for cleaning the substrate.

The central axis of the liquid supply unit 500 has the same central axis as the central axis of the first chamber 310 and the central axis of the second chamber 330 . Accordingly, the liquid supply unit 500 is disposed along the central axis of the first chamber 310 and the central axis of the second chamber 330 . Specifically, the liquid supply unit 500 is disposed on the central axis of the first chamber 310 and the central axis of the second chamber 330 , and is disposed inside the first chamber 310 and the second chamber 330 . .

A lower portion of the liquid supply unit 500 and the spiral portion 900 are disposed in the second chamber 330 . In this case, the lower part of the liquid supply part 500 and the spiral part 900 are inserted and accommodated in the second chamber 330 .

A liquid outlet 510 is provided at the lower end of the liquid supply unit 500 . Accordingly, the liquid supplied to the liquid supply unit 500 is discharged through the liquid discharge port 510 .

The central point of the liquid discharge port 510 is disposed on the central axis of the liquid supply unit 500 . Accordingly, the liquid supply unit 500 is disposed on the central axis of the first chamber 310 and the central axis of the second chamber 330 , and the liquid outlet 510 and the lower surface of the two-fluid nozzle 10 for cleaning the substrate. , that is, formed in the center of the lower surface of the body 100 (or the lower body 130).

The gas outlet 331 communicates with the second chamber 330 and is disposed to surround the liquid outlet 510 .

The gas discharge port 331 is formed as a space between the inner side of the injection unit 131 and the outer end of the liquid supply unit 500 . This gas discharge port 331 has a ring shape. Accordingly, the gas outlet 331 is disposed around the liquid supply unit 500 , and has a ring shape to surround the liquid outlet 510 .

The gas discharge port 331 communicates with the first chamber 310 and the second chamber 330 through the plurality of spiral flow passages 910 of the spiral portion 900 .

The spiral part 900 is provided under the liquid supply part 500 to be disposed in the second chamber 330 , and a plurality of spiral flow paths 910 communicating with the gas outlet 331 are formed.

The spiral part 900 is disposed in the second chamber 330 to communicate with the gas outlet 331 .

The spiral part 900 is formed under the liquid supply part 500 and provided, and at least a portion of the spiral part 900 and the liquid supply part 500 , that is, the lower part of the liquid supply part 500 is a second chamber 330 . inserted and placed in In other words, the spiral part 900 and the lower part of the liquid supply part 500 are accommodated in the second chamber 330 .

A plurality of spiral flow passages 910 connecting the second chamber 330 and the gas discharge port 331 are formed in the spiral portion 900 .

In the spiral direction of the plurality of spiral flow paths 910 , the gas supplied to the first chamber 310 through the first gas supply unit 700 and the second gas supply unit 800 flows into the first chamber 310 and the second chamber ( 330) is formed in the same direction as the spiral rotation within.

For example, as described above, when viewed from the top of the first chamber 310, the gas rotates spirally along the inner wall of the first chamber 310 in a clockwise direction inside the first chamber 310, As shown in FIG. 2 , the spiral flow path 910 spirally rotates in a clockwise direction when viewed from the upper portion of the first chamber 310 , and is inclined downward toward the clockwise direction.

As described above, the spiral direction of the plurality of spiral flow passages 910 and the eccentric directions of the first gas supply unit 700 and the second gas supply unit 800 are formed to be the same so that the spiral rotation directions of the gas coincide with each other, so that the first chamber The spiral rotational force of the gas flowing in 310 becomes larger.

Hereinafter, the flow of gas and liquid of the two-fluid nozzle 10 for cleaning a substrate according to a preferred embodiment of the present invention having the above-described configuration will be described.

High-pressure gas is supplied to the first gas supply unit 700 and the second gas supply unit through an external gas supply unit that communicates with the first gas supply unit 700 and the second gas supply unit 800 of the two-fluid nozzle 10 for cleaning the substrate, respectively. (800) respectively.

Thereafter, the high-pressure gas flows inside the first gas supply unit 700 , and then flows into the first chamber 310 through the 1-1 guide unit 710 , and then flows through the second gas supply unit 800 . After flowing inside, it flows into the first chamber 310 through the 2-1 guide part 810 . In this case, the gas supplied through the first gas supply unit 700 flows to the front right side of the first chamber 310 , and the gas supplied through the second gas supply unit 800 flows to the rear of the first chamber 310 . will move to the left.

The first gas supply unit 700 communicates with the front of the first chamber 310 , and is eccentric to the right (one side) from the central axis of the body 100 , and the second gas supply unit 800 is connected to the first chamber 310 . ) communicated to the rear, but is eccentric from the central axis of the body 100 to the left (the other side), so the gas flowing into the first chamber 310 is viewed from the top of the first chamber 310 . It rotates in the direction and flows in the downward direction. In other words, the gas flows while spirally rotating in the clockwise direction inside the first chamber 310 .

As above, the clockwise rotation of the gas inside the first chamber 310 is because the first gas supply unit 700 and the second gas supply unit 800 are arranged to form a symmetry in the diagonal direction of the body 100, This is because the gas supplied through the first gas supply unit 700 and the gas supplied through the second gas supply unit 800 rotate in the same direction (ie, clockwise).

The gas flowing in the first chamber 310 fills the first chamber 310 and flows to an upper portion of the first chamber 310 . The gas flowing to the upper part of the first chamber 310 flows to the open upper part of the second chamber 330 through a section in which the first chamber 310 and the second chamber 330 communicate, and thus the second chamber ( 330) flows into

The gas flowing into the second chamber 330 flows into the plurality of spiral passages 910 of the spiral portion 900 .

The gas flowing through the plurality of spiral passages 910 flows along the plurality of spiral passages 910 , and then is discharged to the gas outlet 331 . In this case, the gas is discharged to the gas outlet 331 after the clockwise spiral rotation is further accelerated by the plurality of spiral flow passages 910 .

The liquid supplied through the external liquid supply unit flows through the inside of the liquid supply unit 500 and is discharged to the outside through the liquid discharge port 510 .

The liquid discharged through the liquid discharge port 510 collides with the high-speed, high-pressure gas discharged through the gas discharge port 331 at the bottom of the injection unit 131 to generate droplets of the mixture. As described above, the droplets of the mixture generated in the lower portion of the ejection unit 131 are ejected downward. In this case, the liquid droplets of the mixture collide with the high-speed, high-pressure gas, and are converted to the form of fine water droplets and sprayed in the form of a spray.

The droplets of the sprayed mixture as described above are sprayed on the upper surface of the wafer located below the two-fluid nozzle 10 for cleaning the substrate, through which the cleaning process of the wafer is performed.

The two-fluid nozzle 10 for cleaning a substrate according to a preferred embodiment of the present invention having the above configuration has the following effects.

Due to the configuration of the first chamber 310 , the bulkhead 135 , the second chamber 330 , the first gas supply unit 700 , and the second gas supply unit 800 , when gas is supplied to the first chamber 310 , After the gas is filled in the first chamber 310 by the partition wall 135 , it flows into the second chamber 330 through the open upper part of the second chamber 330 .

In this case, a pressure difference is generated between the pressure inside the first chamber 310 and the pressure inside the second chamber 330 . In other words, there is a relationship 'pressure inside the first chamber 310 > pressure inside the second chamber 330 '.

Due to this pressure difference, the flow velocity of the gas in the communication section between the first chamber 310 and the second chamber 330 is accelerated. That is, the gas flowing into the second chamber 330 from the first chamber 310 is accelerated in the upper part of the opening of the second chamber 330 that is the communication section between the first chamber 310 and the second chamber 330 . After that, it will flow into the second chamber 330 .

As such, as the flow rate of the gas flowing into the second chamber 330 is accelerated and increased, the pressure and flow rate of the gas discharged to the gas outlet 331 is higher than that of the conventional two-fluid nozzle for cleaning substrates under the same conditions, In this way, droplets of the mixture with higher velocity and finer particles can be produced.

Since the first chamber 310 and the second chamber 330 are formed by the partition wall 135 structure, the discharge pressure is generated by the direction vector of the supply pressure of the first gas supply unit 700 and the second gas supply unit 800 . This decrease can be effectively prevented.

In detail, in the conventional case, since a separate chamber is not divided, the gas flowing in the lower direction, which is the discharge port direction, is affected by the supply pressure of the gas supplied through the gas supply unit. Accordingly, when the supply pressure of the gas through the gas supply unit is increased, there may be a problem in that the discharge pressure of the gas is decreased. However, in the present invention, after the gas is supplied and filled into the first chamber 310, it flows into the second chamber 330, and then flows into a plurality of spiral passages 910 located in the lower direction, and then, It is discharged through the discharge port 331 . As such, since the flow of the gas flowing in the discharge port 331 direction is made inside the second chamber 330 , the supply pressure of the gas by the first gas supply unit 700 and the second gas supply unit 800 is the second The flow inside the chamber 330 is not affected. Therefore, even if the supply pressure of the gas through the first gas supply unit 700 and the second gas supply unit 800 increases, the discharge pressure of the gas does not decrease due to this effect.

The first gas supply unit 700 and the second gas supply unit 800 are eccentrically disposed on one side and the other side, respectively, on the front and rear sides of the first chamber 310 with respect to the central axis of the body 100, respectively, and at the same time diagonal to each other By being symmetrically disposed in the direction, when gas is supplied into the first chamber 310 through the first gas supply unit 700 and the second gas supply unit 800 , the gas rotates in a clockwise or counterclockwise direction to spiral A rotational flow occurs, and through this, when the gas flows into the first chamber 310 and the second chamber 330 , a loss in the flow pressure of the gas can be minimized.

The 1-1 guide part 710 and the 2-1 guide part 810 are provided so that the gas smoothly flows along the inner wall of the first gas supply part 700 and the inner wall of the first chamber 310, The second gas may flow smoothly along the inner wall of the gas supply unit 800 and the inner wall of the first chamber 310 . Accordingly, by flowing into the first chamber 310 while maintaining the high-pressure and high-speed state of the gas due to the Coanda effect, it is possible to minimize the decrease in the flow rate and the loss of the flow pressure.

The 1-2-th guide part 730 and the 2-2nd guide part 830 are provided to further maximize the above-described spiral rotation of the gas and the Coanda effect. In detail, due to the eccentric structure of the first gas supply unit 700 and the second gas supply unit 700 , the gas flows along the inner wall of the first chamber 310 , thereby spiraling inside the first chamber 310 . The rotational flow is performed, and the 1-2 guide part 730 transfers the gas supplied through the first gas supply part 700 to the inner wall of the first gas supply part 700 in one direction and the first chamber 310 in one direction. It functions to guide the inner wall, and the 2-2 guide part 830 guides the gas supplied through the second gas supply part 800 to the other side of the inner wall of the second gas supply part 800 and the first chamber 310 . By serving as a guide to the inner wall in the other direction, the Coanda effect of the gas flowing along the inner wall is maximized. Accordingly, in addition to the eccentric structure of the first gas supply unit 700 and the second gas supply unit 800 , it is possible to further maximize the helical rotational flow of the gas inside the first chamber 310 .

As the gas helically rotates along the inner wall of the first chamber 310 , a decrease in the flow rate and a loss in flow pressure of the gas caused by the collision of the gas with the liquid supply unit 500 may be minimized.

The gas flowing into the second chamber 330 flows along the plurality of spiral flow paths 910 of the spiral part 900 and then is discharged to the gas discharge port 331 , so that the flow rate of the gas discharged from the gas discharge port 331 . is increased, and through this, it can collide with the liquid at a high flow rate. Therefore, the velocity of the droplets of the mixture generated by the collision of the liquid and the gas can be sprayed while maintaining a high velocity.

Since the gas discharge port 331 is provided to surround the periphery of the liquid discharge port 510 and has a ring shape, when the gas is discharged, it can be discharged to the outside while maintaining a high flow rate due to the spiral rotation flow.

As described above, in the two-fluid nozzle 10 for cleaning a substrate according to the first preferred embodiment of the present invention, the first chamber ( The flow of the gas to the 310 is made smoothly, and the gas flows rapidly from the first chamber 310 to the second chamber 330 by the partition wall 135 structure, and then spirally rotates by the spiral part 900 . By this accelerated discharge to the gas discharge port 331 at a high flow rate, the flow pressure of the gas discharged to the gas discharge port 331 is stabilized through the stable flow pressure and flow inside the first chamber 310 and the second chamber 330 . and an increase in flow rate is achieved. Accordingly, the gas discharged through the gas outlet 331 collides with the liquid at a high flow rate, and thereby, droplets having a high velocity and fine particles may be generated. As such, the present invention has a higher speed than a conventional two-fluid nozzle for cleaning a substrate, and can produce droplets having fine particles.

Hereinafter, with reference to FIGS. 8A to 9C , the flow pressure distribution of the conventional two-fluid nozzle 1 for cleaning a substrate and the two-fluid nozzle 10 for cleaning a substrate according to a preferred embodiment of the present invention having the above configuration The flow pressure distribution will be compared and explained.

8A is a diagram illustrating a flow pressure distribution of a gas in a chamber of a conventional two-fluid nozzle for cleaning substrates in a cross-sectional view viewed from the side of the chamber, and FIG. It is a view showing the flow pressure distribution of the gas inside the chamber in a cross-sectional view, and FIG. 8c shows the flow pressure distribution of the gas in the chamber in a cross-sectional view viewed from the top of the spiral part of the chamber of the conventional two-fluid nozzle for cleaning a substrate. FIG. 9A is a diagram showing the flow pressure distribution of the gas inside the first chamber in a cross-sectional view viewed from the side of the first chamber of the two-fluid nozzle for cleaning a substrate according to a preferred embodiment of the present invention, FIG. 9B is a diagram showing the flow pressure distribution of the gas inside the first chamber in a cross-sectional view viewed from the top of the first chamber of the two-fluid nozzle for cleaning a substrate according to a preferred embodiment of the present invention, and Fig. 9c is a preferred embodiment of the present invention It is a diagram showing the flow pressure distribution of the gas inside the second chamber and the spiral part in a cross-sectional view viewed from the top of the spiral part of the two-fluid nozzle for cleaning substrates according to the example.

As shown in FIGS. 8A to 8C , in the case of the conventional two-fluid nozzle 1 for cleaning a substrate, a separate partition wall is not provided inside the chamber 5 , and the gas supply unit 3 is connected to the chamber 5 . It is communicated with the chamber 5 so as not to be eccentric to the central axis of the.

As described above, since a separate partition wall is not provided in the chamber 5 , the gas flowing into the chamber 5 through the gas supply unit 3 flows downward and is discharged to the gas discharge unit through the spiral flow path 7 . In addition, since the gas supply unit 3 does not have an eccentric structure, the gas flowing into the chamber 5 through the gas supply unit 3 does not generate a constant flow in the chamber 5 .

Referring to FIGS. 8A to 8C , the pressure of the gas inside the chamber 5 is maintained the same throughout the entire section of the chamber 5 , and the pressure is maintained low only in the vicinity of the spiral passage 7 . Accordingly, the gas is accelerated only in a lower portion of the chamber 5 in which the spiral flow path 7 is located.

As described above, in the case of the two-fluid nozzle 1 for cleaning the substrate, the gas flow rate is accelerated only in the spiral flow path 7 , and since the area provided with the spiral flow path 7 is relatively small, the gas is sufficiently spiraled. Rotational flow cannot be achieved, and due to this, when gas is discharged from the gas discharge port, it does not have a high discharge speed.

In addition, the pressure of the gas flowing into the spiral flow path 7 in the lower part of the region where the gas supply unit 3 is located and the pressure of the gas flowing into the spiral flow path 7 in the lower part of the region opposite to where the gas supply unit 3 is located. difference will occur. Accordingly, as shown in FIG. 8C , the pressure of the gas flowing into the spiral flow path 7 is not uniformly introduced.

Due to the non-uniformity of the gas flowing into the spiral flow path 7 , the spiral rotation flow may not be effectively performed in the spiral flow path 7 , and the gas discharged to the discharge port may not have a sufficient discharge speed.

As such, in the case of the two-fluid nozzle 1 for cleaning the substrate, a separate configuration for increasing the flow rate of the gas inside the chamber 5 is not provided.

On the other hand, in the case of the two-fluid nozzle 10 for cleaning a substrate according to the preferred embodiment of the present invention, the flow velocity of the gas in the section in which the first chamber 310 and the second chamber 330 are communicated by the partition wall 135 . will rise high.

In detail, in the two-fluid nozzle 10 for cleaning a substrate according to a preferred embodiment of the present invention, the first chamber 310 and the second chamber 330 are separated by a partition 135, so that the gas After filling the interior of the first chamber 310 , the gas flows into the interior of the second chamber 330 through the open upper portion of the second chamber 330 .

In this case, since the relationship 'pressure inside the first chamber 310 > pressure inside the second chamber 330' is satisfied, as shown in FIGS. 9A to 9C , the pressure inside the first chamber 310 and the second A pressure difference is generated between the pressures inside the second chamber 330 .

Due to the above pressure difference, the flow velocity of the gas in the communication section between the first chamber 310 and the second chamber 330 is accelerated due to the pressure difference. That is, the gas flowing into the second chamber 330 from the first chamber 310 is accelerated in the upper part of the opening of the second chamber 330 that is the communication section between the first chamber 310 and the second chamber 330 . After that, it will flow into the second chamber 330 .

In addition, since the pressure in the section provided with the plurality of spiral flow paths 910 in the lower portion of the second chamber 330 is lower than that in the section inside the second chamber 330 (that is, the pressure > the pressure of the plurality of spiral passages 910 entry section)), when gas flows into the plurality of spiral passages 910 , the flow velocity of the gas is accelerated once more.

As described above, in the two-fluid nozzle 10 for cleaning a substrate according to the present invention, the gas flow rate is accelerated in the second section, and through this, the gas discharge speed is higher than that of the prior art.

In addition, the gas, which is spirally rotated in the first chamber 310 by the first gas supply unit 700 and the second gas supply unit 800 , is spirally rotated in the same direction even when flowing into the second chamber 330 . The flow is maintained, and the speed of the spiral rotation flow is further increased due to the pressure difference between the first chamber 310 and the second chamber 330 . Accordingly, when the gas flows into the plurality of spiral passages 910 inside the second chamber 330 , the spiral rotational flow may be further accelerated.

In addition, in the case of the two-fluid nozzle 10 for cleaning a substrate according to the present invention, the first chamber 310 and the second chamber ( 330) As the gas performs a spiral rotational flow inside, the pressure of the gas flowing into the spiral flow path 910 is relatively uniformly introduced as shown in FIG. 9c. Accordingly, the spiral rotation flow in the spiral flow path 910 can be made more effectively.

In summary, in the two-fluid nozzle 10 for cleaning a substrate according to the present invention, there is a partition wall 135 dividing the first chamber 310 and the second chamber 330 , so that the first chamber 310 and the second chamber 310 are present. As the flow velocity of the gas accelerates in the communication section of the chamber 330 and the communication section between the second chamber 330 and the plurality of spiral flow paths 310 , that is, in the two sections, the first chamber 310 and the second Effective spiral rotational flow is made inside each of the chamber 330 and the plurality of spiral flow paths 910 , and through this, when gas is discharged through the gas outlet 331 , while maintaining a high pressure and high speed state can be ejected. Accordingly, higher pressure and higher speed of gas than the conventional two-fluid nozzle 1 for cleaning a substrate is discharged, and through this, droplets of a mixture having a higher speed and fine particles can be generated.

Hereinafter, a two-fluid nozzle 10 ′ for cleaning a substrate according to a modified example will be described with reference to FIG. 10 .

10 is a view showing a modified example of the two-fluid nozzle for cleaning a substrate according to the present invention.

As shown in FIG. 10 , a curved portion 137 ′ may be provided at the upper end of the partition wall 135 ′ of the two-fluid nozzle 10 ′ for cleaning the substrate.

The curved portion 137' may be formed to have a curvature so that the outer and inner surfaces of the barrier rib 135' are gathered toward the upper portion of the barrier rib 135'.

In other words, the curved portion 137' is inclined from the outer surface of the partition wall 135' toward the inner surface of the partition wall 135' toward the upper portion of the partition wall 135', and at the same time, the inner surface of the partition wall 135'. It may be formed to be inclined in the direction of the outer surface of the partition wall 135'.

The curved portion 137 ′ is a second chamber that is a communication section between the first chamber 310 and the second chamber 330 when gas flows into the second chamber 330 from the first chamber 310 . By guiding the gas in the upper part of the opening 330, it functions to smoothly flow into the interior of the second chamber 330 of the gas.

As shown in FIG. 10 , the curved portion 137 ′ is inclined from the outer surface of the barrier rib 135 ′ toward the inner surface of the barrier rib 135 ′ toward the upper portion of the barrier rib 135 ′, or is formed to be inclined toward the inner surface of the barrier rib 135 ′, as shown in FIG. 10 . ') may be formed to be inclined from the inner surface of the partition wall 135' toward the outer surface of the partition wall 135' toward the upper portion.

A curved groove 113 may be provided on a lower surface of the flange 111 of the upper body 110 of the two-fluid nozzle 10 ′ for cleaning the substrate to have a curved surface.

The curved groove 113 may be formed to have a ring shape on the lower surface of the flange 111 to correspond to the position of the curved portion 137 ′.

The curved groove 113 is formed in the first chamber 310 and the second chamber 330 when gas is introduced into the second chamber 330 from the first chamber 310 together with the above-described curved portion 137 ′. ) guides the gas in the upper part of the communication section, and functions to smoothly flow the gas into the interior of the second chamber 330 .

As described above, as the curved portion 137 ′ and the curved groove 113 are provided, it is possible to smoothly guide the flow of gas flowing into the interior of the second chamber 330 from the first chamber 310 , and through this , by maintaining a high flow rate of the gas flowing into the second chamber 330 , it is possible to maintain a high gas discharge pressure.

Each of the two-fluid nozzles 10 and 10 ′ for cleaning a substrate according to the present invention described above may be deformed into a shape in which the spiral portion 900 is not provided.

When the spiral part 900 is not provided, the gas supplied to the first chamber 310 performs a spiral rotation flow, flows into the second chamber 330 , and then is immediately discharged through the gas outlet 331 . .

The two-fluid nozzle for cleaning a substrate without the spiral portion 900 has a relatively higher helicity (helicity) compared to the two-fluid nozzles 10 and 10 ′ for cleaning the substrate provided with the spiral portion 900 . has a low value.

More specifically, the spiral is defined as the dot product of vorticity and velocity. In other words, the helix 'h' is 'h = ω·V'. In this case, 'ω' is the vorticity, which is defined as the rotation of the flow velocity. That is, 'ω = ▽·V'. '▽' is the rotation vector.

According to the above definition of spiral, when there is little difference between the magnitude of the vortex and the velocity, the magnitude of the spiral is determined according to the magnitude of the angle between the vortex and the direction of the velocity.

In the case of the two-fluid nozzles 10 and 10 ′ for cleaning a substrate provided with the spiral portion 900 , the gas flows through the spiral portion 900 and then is discharged to the gas outlet 331 , so the direction of vortex and velocity becomes close to horizontal, and thus the magnitude of the helix is large.

As such, as the size of the spiralness increases, the jet angle of the droplets discharged from the two-fluid nozzles 10 and 10' for cleaning the substrate also has a large value.

On the other hand, in the case of a two-fluid nozzle for cleaning a substrate that is not provided with the spiral part 900 , without the spiral part 900 , the gas from the first chamber 310 flows directly into the second chamber 330 to the gas outlet ( 331), the direction of the vortex and the velocity becomes close to vertical, and therefore, the magnitude of the spiral is small.

As the size of the spiral is reduced as described above, the jet angle of the droplets discharged from the two-fluid nozzle for cleaning the substrate in which the spiral portion 900 is not provided also has a small value.

Therefore, in the case of the two-fluid nozzle for cleaning substrates without the spiral part 900, compared to the case where the spiral part 900 is provided, the jetting angle of the discharged droplets is relatively small, and the density of the droplets is also have high characteristics.

As described above, although described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. Or it can be carried out by modification.

10: two-fluid nozzle for substrate cleaning
100: body 110: upper body
111: flange 130: lower body
131: injection unit 133: hole
135: bulkhead 310: first chamber
330: second chamber 331: gas outlet
500: liquid supply 510: liquid outlet
700: first gas supply unit 710: 1-1 guide unit
730: first 1-2 guide unit 800: second gas supply unit
810: 2-1 guide part 830: 2-2 guide part
900: spiral part 910: spiral flow path

Claims (10)

a body having a first chamber in which gas flows, and a second chamber disposed inside the first chamber so as to have the same central axis as the central axis of the first chamber and communicating with the first chamber;
a first gas supply unit communicating with the first chamber to supply gas to the first chamber;
a liquid supply part having the same central axis as the central axis of the body, at least a portion of which is disposed in the second chamber, and having a liquid discharge port at an end thereof; and
a gas outlet communicating with a lower portion of the second chamber and having a ring shape to surround the liquid outlet; and
The second chamber is formed inside the first chamber by a partition wall disposed inside the first chamber, the opened upper part of the second chamber communicates with the upper part of the first chamber, and the first gas The opened upper part of the second chamber, which is a communication section between the first chamber and the second chamber, is higher than the first gas supply part so that the supply pressure of the gas supplied by the supply unit does not affect the flow inside the second chamber. located at the top,
When the gas is supplied to the first chamber by the first gas supply unit, the gas is filled in the first chamber by the partition wall, and then flows into the second chamber through the open upper part of the second chamber and the gas flowing into the second chamber is discharged through the gas discharge port and collides with the liquid discharged through the liquid discharge port to generate droplets of the mixture. According to claim 1,
The two-fluid nozzle for cleaning a substrate, characterized in that the first gas supply unit is eccentric to one side from the central axis of the body. 3. The method of claim 2,
It further includes; a spiral portion provided under the liquid supply portion so as to be disposed in the second chamber and having a plurality of spiral passages communicating with the gas outlet;
The two-fluid nozzle for cleaning substrates, characterized in that the spiral direction of the plurality of spiral passages is the same as the direction in which the gas supplied to the first chamber through the first gas supply unit spirally rotates in the first chamber. . According to claim 1,
One side of the inner wall of the first gas supply unit and one side of the inner wall of the first chamber are inclinedly connected so that a step does not occur between one side of the inner wall of the first gas supply unit and one side of the inner wall of the chamber communicating with one side of the inner wall of the first gas supply unit 1 - A two-fluid nozzle for cleaning a substrate, characterized in that it has a single guide part. 5. The method of claim 4,
The two-fluid nozzle for cleaning a substrate, characterized in that the 1-1 guide part has a curvature. According to claim 1,
The first gas supply unit is provided with a 1-2 guide portion inclined in one direction of the first gas supply unit, and the cross-sectional area of the first gas supply unit becomes narrower toward the first chamber. fluid nozzle. 3. The method of claim 2,
and a second gas supply unit eccentric from the central axis of the body to the other side and communicating with the first chamber. 8. The method of claim 7,
The first gas supply unit includes first and second guide portions inclined in a direction toward one side of the first gas supply unit, and the cross-sectional area of the first gas supply unit becomes narrower toward the first chamber,
The second gas supply unit is provided with a 2-2 second guide portion inclined in the other direction of the second gas supply unit, so that the cross-sectional area of the second gas supply unit becomes narrower toward the first chamber. fluid nozzle. According to claim 1,
Cleaning the substrate, characterized in that a curved portion is formed at the upper end of the partition wall so that the gas is smoothly guided when the gas flows into the open upper portion of the second chamber, which is a communication section between the first chamber and the second chamber. For two-fluid nozzles. 10. The method of claim 9,
The body is made of a combination of an upper body and a lower body,
The liquid supply part is formed to protrude downward from the flange of the upper body,
A ring-shaped curved surface corresponding to the position of the curved portion on the lower surface of the flange so that the gas is smoothly guided when the gas flows into the open upper portion of the second chamber, which is a communication section between the first chamber and the second chamber. A two-fluid nozzle for cleaning a substrate, characterized in that a groove is formed.

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