WO2016006615A1 - バルブ、流体デバイス、流体制御方法及びバルブの製造方法 - Google Patents
バルブ、流体デバイス、流体制御方法及びバルブの製造方法 Download PDFInfo
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- WO2016006615A1 WO2016006615A1 PCT/JP2015/069572 JP2015069572W WO2016006615A1 WO 2016006615 A1 WO2016006615 A1 WO 2016006615A1 JP 2015069572 W JP2015069572 W JP 2015069572W WO 2016006615 A1 WO2016006615 A1 WO 2016006615A1
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- Prior art keywords
- wall
- valve
- thin film
- inner cylinder
- flow path
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K99/0001—Microvalves
- F16K99/0003—Constructional types of microvalves; Details of the cutting-off member
- F16K99/0015—Diaphragm or membrane valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
- F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
- F16K7/17—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being actuated by fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K99/0001—Microvalves
- F16K99/0034—Operating means specially adapted for microvalves
- F16K99/0055—Operating means specially adapted for microvalves actuated by fluids
- F16K99/0059—Operating means specially adapted for microvalves actuated by fluids actuated by a pilot fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K2099/0073—Fabrication methods specifically adapted for microvalves
- F16K2099/0078—Fabrication methods specifically adapted for microvalves using moulding or stamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K2099/0082—Microvalves adapted for a particular use
- F16K2099/0084—Chemistry or biology, e.g. "lab-on-a-chip" technology
Definitions
- the present invention relates to a valve, a fluid device, a fluid control method, and a valve manufacturing method.
- Non-Patent Document 1 As a valve for controlling the flow of fluid in a flow path formed on a joint surface between a first substrate and a second substrate constituting a laminated substrate, a resin sheet is sandwiched between the interfaces of the first substrate and the second substrate.
- a valve having a layer structure is known (Non-Patent Document 1).
- Fig. 1 shows a cross section of a conventional valve having a three-layer structure.
- a resin sheet 111 is laminated on the entire top surface of the first substrate 110, and a second substrate 112 is further laminated.
- a groove is dug in the lower surface of the second substrate 112, and the resin sheet 111 is joined to the lower surface of the second substrate 112 so as to cover the groove, and a flow path 114 is formed.
- a right-pointing arrow in the figure indicates that the flow path extends in the right direction on the paper surface and that the fluid flows in the right direction on the paper surface.
- the first substrate 110 is provided with a through hole 113.
- the resin sheet 111 swells upward and blocks the flow path 114 to prevent the flow of fluid (see FIG. 2).
- the resin sheet returns to its original flat shape due to its own elasticity.
- the resin sheet 111 is caused to function as a diaphragm member of the valve.
- the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a valve, a fluid device, a fluid control method, and a valve manufacturing method that are excellent in durability.
- a valve according to an embodiment of the present invention includes a cylindrical structure having an outer cylindrical portion and an inner cylindrical portion, a thin film portion disposed so as to cover one end of the inner cylindrical portion, and a peripheral edge of the thin film portion. There is provided a valve provided with a diaphragm member that has a round circuit and an anchor portion that is in close contact with the inner wall of the outer tube portion and the outer wall of the inner tube portion.
- a valve according to an embodiment of the present invention is a valve disposed in a flow path, and has an outer cylindrical portion having an inner diameter 2 (R + ⁇ R) and a cylindrical shape having an inner diameter 2r and an outer diameter 2R.
- a cylindrical structure having an inner cylinder part, a thin film part arranged so as to cover one end of the inner cylinder part, and a circumference of the thin film part, and the inner wall of the outer cylinder part and the outer wall of the inner cylinder part
- a diaphragm member having an anchor portion closely adhered along the surface, and r and ⁇ R satisfy the following formula (a).
- a valve according to an embodiment of the present invention is a valve disposed in a flow path, and includes a first member provided with a hole having an opening on a first surface in contact with a fluid, and the opening A second member provided inside, a thin film portion disposed so as to cover one end of the second member, an anchor portion provided in accordance with a shape of the second member, the thin film portion and the anchor portion, And a connecting portion that is provided between and fixedly attached to the one end surface of the second member, and the thin film portion, the anchor portion, and the connecting portion are integrally formed.
- a member is disposed in a flow path, and includes a first member provided with a hole having an opening on a first surface in contact with a fluid, and the opening A second member provided inside, a thin film portion disposed so as to cover one end of the second member, an anchor portion provided in accordance with a shape of the second member, the thin film portion and the anchor portion, And a connecting portion that is provided between and fixedly attached to the one end surface of the second
- the valve in one embodiment of the present invention has a through-hole, and is a thin-film portion disposed so as to cover at least a double tubular structure and one end of the first tubular portion of the tubular structure. And a diaphragm member formed integrally with the thin film portion and having an anchor portion positioned between an inner wall of the second tube portion of the tubular structure and an outer wall of the first tube portion.
- a fluid device according to an embodiment of the present invention includes the above-described valve and a flow path in which the valve is disposed.
- a fluid device according to an embodiment of the present invention includes a plurality of the above-described valves, and at least one of the plurality of valves is different in height from the other valves.
- a fluid device includes the above-described valve, a first substrate having a diaphragm member exposed on the first surface, a second substrate having a second surface on which a flow path is formed, The first substrate and the second substrate were bonded together so that the first surface and the second surface face each other and the flow path crosses directly above the diaphragm member.
- a fluid control method is the fluid control method in the fluid device described above, wherein the anchor portion is not deformed while being fixed, and the thin film portion is opposite to the channel side or the channel. Deform to project to the side.
- a fluid control method includes a cylindrical structure having an outer cylinder part and an inner cylinder part, a thin film part arranged to cover one end of the inner cylinder part, and a thin film part
- a valve having a diaphragm member having a circumference and a diaphragm member having an inner wall of the outer cylinder part and an anchor part closely attached along the outer wall of the inner cylinder part is disposed in the flow path, and the anchor part remains fixed Without deformation, the thin film portion is deformed so as to project to the side of the flow path or the opposite side of the flow path.
- a method of manufacturing a valve according to an embodiment of the present invention includes a cylindrical shape including an outer cylindrical portion, an inner cylindrical portion, and a holding member that fixes a relative position of the outer cylindrical portion and the inner cylindrical portion.
- a manufacturing method of a valve in one embodiment of the present invention has an outer cylinder part and an inner cylinder part, and the first end part of the inner cylinder part is more shaft than the first end part of the outer cylinder part.
- a diaphragm member comprising a thin film portion disposed so as to cover one end of the inner cylinder portion, an inner wall of the outer cylinder portion, and an anchor portion in close contact with the outer wall of the inner cylinder portion, and the lid Removing the material.
- a valve excellent in durability a fluid device including the valve, a fluid control method using the valve, and a method of manufacturing a valve excellent in durability.
- FIG. 4C is a sectional view taken along line C1-C1 in FIG. 4A.
- FIG. 4C is a sectional view taken along line C1-C1 in FIG. 4A.
- FIG. 4C is a sectional view taken along line C1-C1 in FIG. 4A.
- FIG. 4C is a sectional view taken along line C1-C1 in FIG. 4A.
- 1 is a cross-sectional view of a fluidic device in one embodiment.
- 1 is a cross-sectional view of a fluidic device in one embodiment.
- 1 is a cross-sectional view of a fluidic device in one embodiment.
- 1 is a cross-sectional view of a fluidic device in one embodiment.
- It is a perspective view which shows the cylindrical structure in one Embodiment. It is a figure explaining the manufacturing method of the valve in one embodiment. It is sectional drawing of the cylindrical structure in one Embodiment.
- It is a mimetic diagram of a fluid device in one embodiment.
- It is a mimetic diagram of a fluid device in one embodiment.
- 6 is a graph showing the results of Experimental Example 1.
- 10 is a graph and a photograph showing the results of Experimental Example 2. It is a mimetic diagram of a fluid device in one embodiment. 10 is a graph and a photograph showing the results of Experimental Example 3. 10 is a graph and a photograph showing the results of Experimental Example 4. It is a mimetic diagram of a fluid device in one embodiment. 10 is a graph showing the results of Experimental Example 5. It is a figure explaining operation
- valve that is the first embodiment of the present invention
- fluid device that is the second embodiment
- fluid control method that is the third embodiment
- method of manufacturing the valve that is the fourth embodiment
- FIG. 3 is an example of a laminated substrate 20 provided with a valve according to the first embodiment of the present invention.
- a fluid such as a liquid or a gas flows in the positive direction of the X axis indicated by an arrow in the drawing.
- a small-diameter portion 21a is formed in which the inner diameter of the channel 21 is smaller than that of other portions.
- the valve 1 of the present embodiment is disposed, for example, below the small diameter portion 21 a of the flow path 21 (in the negative direction of the Z axis in FIG. 3) or at a predetermined position of the flow path 21.
- valve of the present embodiment is a valve disposed in the flow path, and is fixed to at least a part of the wall surface of the substrate provided with a hole having an opening on the first surface,
- FIG. 4A is an XZ plane cross-sectional view (a cross-sectional view including a central axis 450 below) of the valve 400 of the first embodiment.
- a valve 400 shown in FIG. 4A includes a cylindrical structure having an outer cylinder portion 410 and an inner cylinder portion 420, a thin film portion 430 disposed so as to cover one end 423 of the inner cylinder portion 420, and a peripheral edge of the thin film portion 430.
- a diaphragm member having an inner wall 415 of the outer tube portion 410 and an anchor portion 440 closely attached along the outer wall 426 of the inner tube portion 420.
- the outer cylinder part 410 and the inner cylinder part 420 have a cylindrical shape having a common central axis 450. Further, the cylindrical structure has the central axis 450. Further, the inner wall 415 of the outer cylinder portion 410 may be an inner wall of a hole opened in the substrate. That is, the inner wall of the outer cylinder portion 410 may be integrated with the substrate.
- the shape of the outer cylinder part 410 and the inner cylinder part 420 which comprise at least a double (two layer) cylindrical structure is not specifically limited, For example, a cylinder may be sufficient, a triangle cylinder, a square cylinder, hexagonal It may be a polygonal cylinder such as a cylinder. Moreover, the outer cylinder part 410 and the inner cylinder part 420 may have the same shape or different shapes.
- FIG. 4B to 4E are cross-sectional views taken along line C1-C1 of FIG. 4A (hereinafter, the cross section taken along line C1-C1 may be referred to as cross-section C1).
- the cross section C ⁇ b> 1 includes a plane perpendicular to the axial direction of the central axis 450, and is a plane that passes through the outer cylinder portion 410, the inner cylinder portion 420, and the anchor portion 440 among the cylindrical structure and the diaphragm member.
- FIG. 4B shows an example in which both the outer cylinder part 410 and the inner cylinder part 420 are cylindrical.
- FIG. 4C shows an example in which the outer tube portion 410 is a cylinder and the inner tube portion 420 is a square tube.
- FIG. 4D shows an example in which the outer cylinder part 410 is a square cylinder and the inner cylinder part 420 is a cylinder.
- FIG. 4E shows an example in which the outer tube portion 410 and the inner tube portion 420 are both square tubes.
- the cylinder includes a tubular structure or a hollow rod-shaped structure whose cross-sectional shape is circular or elliptical.
- the triangular cylinder, the square cylinder, and the hexagonal cylinder each include a tubular structure or a hollow bar-shaped structure whose cross-sectional shape is a triangle, a square, or a hexagon.
- the cross section of the outer cylinder portion is similar to the cross section of the inner cylinder portion.
- the cross section of the anchor portion is similar to at least one of the cross section of the outer cylinder portion and the cross section of the inner cylinder portion.
- the material of the diaphragm member is a material having elasticity, for example, an elastomer.
- an elastomer one made of a polymer compound is applicable.
- PDMS polydimethylsiloxane
- silicone elastomer are mentioned as an example of the elastomer material which comprises a diaphragm member.
- the anchor portion 440 of the diaphragm member makes a round around the periphery of the thin film portion 430, and has an anchoring function of the diaphragm member by closely contacting along the inner wall 415 of the outer cylinder portion 410 and the outer wall 426 of the inner cylinder portion 420. ing. Thereby, the diaphragm member is firmly fixed to the cylindrical structure.
- the thin film portion 430 of the diaphragm member is in close contact with the inner wall 428 of the inner cylinder portion 420, and the diaphragm member is fixed to the cylindrical structure at the close contact portion.
- the inner wall surface of the inner cylinder part, the outer wall surface of the inner cylinder part, and the inner wall surface of the outer cylinder part are a series of continuous surfaces.
- the surface of the anchor portion in contact with the outer wall surface of the inner cylinder portion is a series of surfaces.
- the surface on the inner cylinder portion side of the anchor portion is one surface continuous along the outer wall surface of the inner cylinder portion.
- the surface of the anchor portion in contact with the inner wall surface of the outer cylinder portion is a series of surfaces.
- the surface on the inner cylinder portion side of the anchor portion is one surface continuous along the outer wall surface of the inner cylinder portion.
- the anchor part is formed so as to cover all the outer wall surface of the inner cylinder part in the circumferential direction.
- the thin film portion 430 and the anchor portion 440 are connected and formed continuously and integrally.
- a connection part 435 exists between the thin film part 430 and the anchor part 440.
- the thin film part 430, the connection part 435, and the anchor part 440 are integrally formed with the same material.
- the one end 423 of the inner cylinder part 420 arranged so as to cover the thin film part 430 is arranged on the inner side in the axial direction of the cylindrical structure than the one end 413 of the outer cylinder part 410.
- one end 423 of the inner cylindrical portion 420 is disposed farther in the axial direction of the cylindrical structure than the one end 413 of the outer cylindrical portion 410 with respect to a portion of a diaphragm member exposed to a flow path of the fluid device described later.
- a connecting portion 435 is formed in a space portion generated by this arrangement. The connection portion 435 is fixed in close contact with the surface of the one end 413 of the inner cylinder portion 420.
- the other end of the inner cylinder 420 is not covered with a diaphragm member and is open to the atmosphere.
- the cylindrical structure includes a holding member (a member that fixes the relative positions of the outer cylinder portion and the inner cylinder portion) described later, the holding member is disposed at the other end of the inner cylinder portion 420.
- the valve of this embodiment is fitted into a hole provided in another substrate, the other end of the inner cylindrical portion 420 is in contact with the bottom surface of the hole.
- the diaphragm member is firmly fixed to the cylindrical structure, so that the diaphragm member may be peeled even when the valve is operated repeatedly. Not very durable.
- the thin film portion 430 has a height h
- the anchor portion 440 has a height H
- the diaphragm member is The polymer composition is formed by curing, and the polymer composition has a surface tension of ⁇ , a contact angle with respect to the above cylindrical structure of ⁇ , a density of ⁇ , Region surrounded by the inner wall 415 of the outer cylinder portion 410 and the outer wall 426 of the inner cylinder portion 420 in a cross section C1 (C1-C1 line cross section) perpendicular to the axial direction Z (axial direction of the central axis 450) of the cylindrical structure
- Area S1 the sum L1 of the length of the inner wall 415 of the outer cylinder part and the outer wall 426 of the inner cylinder part in the cross section C1, the area S2 of the region surrounded by the inner wall 428 of the inner cylinder part 420 in the cross section C1, the inner part in
- the shapes of the outer cylinder portion 410 and the inner cylinder portion 420 shown in FIG. 4B are exemplary.
- the shapes of the outer cylinder portion 410 and the inner cylinder portion 420 are not particularly limited, and may be, for example, a cylinder, such as a triangular cylinder, a square cylinder, a hexagonal cylinder, or the like. It may be a polygonal cylinder.
- the outer cylindrical portion 410 and the inner cylindrical portion 420 may have the same shape, may have similar shapes, or may have different cylindrical shapes.
- equation (1) is a model equation, it may deviate from experimentally measured values.
- “satisfies equation (1)” means that the value of Hh (theoretical value) calculated based on equation (1) and the measured value of Hh are expressed by the following equation (A1): It means satisfying.
- ⁇ is preferably 20, more preferably 10, and still more preferably 5.
- equation (A2) is obtained by transforming equation (1).
- the thin film portion 430 has a height h
- the anchor portion 440 has a height H
- the above diaphragm member cures the polymer composition.
- the polymer composition has a surface tension of ⁇ , a contact angle with respect to the above cylindrical structure is ⁇ , a density of ⁇ , and with respect to the axial direction Z of the cylindrical structure.
- valve of this embodiment can be easily manufactured and has excellent durability.
- both the outer cylinder part and the inner cylinder part may be cylindrical.
- FIG. 5 is an XZ plane cross-sectional view (a cross-sectional view including the axis of the cylindrical structure) of the valve 500 of the third embodiment.
- the inner cylinder portion 520 has a cylindrical shape with an inner diameter of 2r and an outer diameter of 2R
- the outer cylinder portion 510 has a cylindrical shape with an inner diameter of 2 (R + ⁇ R), with respect to the axial direction Z of the cylindrical structure.
- equation (2) is a model equation, it may deviate from experimentally measured values.
- “satisfies equation (2)” means that the value of Hh (theoretical value) calculated based on equation (2) and the actual value of Hh are expressed by the following equation (A1): It means satisfying.
- ⁇ includes 20, includes 10, includes 5, and includes ⁇ .
- equation (C7) is obtained by transforming equation (2).
- the inner cylinder portion 520 has a cylindrical shape with an inner diameter 2r and an outer diameter 2R
- the outer cylinder portion 510 has a cylindrical shape with an inner diameter 2 (R + ⁇ R).
- the height of the thin film portion 530 (Axial direction of cylindrical structure
- the height in the direction Z, the film thickness of the thin film portion) h, and the height of the anchor portion 540 (the height in the axial direction Z of the cylindrical structure) H may satisfy the following formula (A4).
- ⁇ includes 20 and includes 10 and includes 5;
- Formula (a) is obtained by modifying Formula (2) above. Moreover, Formula (2) can be transformed into Formula (C7) as follows.
- the valve of the present embodiment may satisfy Hh> 0.
- the height H of the anchor part 540 may be larger than the height h of the thin film part 530.
- the condition for Hh> 0 is cos ⁇ > 0, for example, the contact angle ⁇ of the polymer composition, which is the material of the diaphragm member, with respect to the cylindrical structure is 0 ⁇ ⁇ 90 degrees.
- the contact angle ⁇ of the polymer composition which is the material of the diaphragm member, with respect to the cylindrical structure is 0 ⁇ ⁇ 90 degrees.
- the ⁇ R is smaller than the r.
- ⁇ R represents the distance from the inner wall 515 of the outer cylinder portion 510 to the outer wall 526 of the inner cylinder portion 520
- r is the radius of a circle formed by the inner wall 528 of the inner cylinder portion 528. is there.
- the fluid device in the present embodiment is a fluid device including at least one valve described above.
- the flow path and valve which comprise the fluid device in this embodiment may be a micrometer scale, or a millimeter scale. Any scale fluidic device can be referred to as a “microfluidic device” in the sense of a device having a fine flow path.
- the fluid device includes, for example, the valve described above, a first substrate having a diaphragm member exposed on the first surface, a second substrate having a second surface on which a flow path is formed, the first surface, and the second surface.
- FIG. 6A is an XZ plane cross-sectional view (a cross-sectional view including an axis of a cylindrical structure) of a fluid device 600 according to an embodiment.
- the fluidic device 600 includes a first substrate 660 and a second substrate 670.
- the first substrate 660 includes a cylindrical structure having an outer cylinder portion 610 and an inner cylinder portion 620, a thin film portion 630, an anchor portion 640, and the like.
- a valve having a diaphragm member having a connection portion 635 is provided, and the diaphragm member is exposed on the first surface 665 of the first substrate 660.
- the second substrate 670 has a second surface 675 on which a flow path 680 is formed.
- the first surface 665 and the second surface 675 are opposed to each other, and the first substrate 660 and the second substrate 670 are bonded so that the flow path 680 traverses just above the diaphragm member. Is formed.
- the fluidic device of the present embodiment includes a plurality of the above-described valves, and at least one of the plurality of valves may be different in height h (thickness of the thin film portion) of the thin film portion as compared with the other valves. Good.
- FIG. 13 An example of such a fluidic device is the fluidic device shown in FIG. 13 in FIG. 13, 52e, 52f, 52g, 53d, 53f, 55a, 60a, 61a and 62a are the valves described above.
- valves do not have to have the same thickness of the thin film portion.
- Each of these valves may have different thicknesses of the thin film portions, and the thin film portions of some of the valves may have different thicknesses.
- the thickness of the thin film portion of the valve By making the thickness of the thin film portion of the valve different for each valve, it is possible to control a plurality of valves installed in flow paths having different sizes with the same pressure. Alternatively, by setting the thickness of the thin film portion of the valve to be different for each valve, the flow rate of the fluid flowing through the flow path can be changed for each valve when each valve is controlled with the same pressure.
- FIG. 20A to 20D are diagrams for explaining the operation of a fluidic device including valves with different thicknesses of a thin film portion.
- FIG. 20A is a diagram of a fluidic device comprising a valve T1 according to one embodiment.
- the fluid in the flow path is moved at the flow rate F1 by applying a suction force S to the flow path.
- FIG. 20C is a diagram of a fluid device including a valve T2, in which the thickness of the thin film portion is thicker than that of the valve T1, and other conditions are the same as those of the valve T1.
- the fluid in the flow path is moved at the flow velocity F1.
- the flow rate F2 can be arbitrarily set by adjusting the valve operating height A2 by controlling the thickness of the film thickness portion of the valve T2. Further, without changing the suction force S and the pressure P for each valve, the valve T1 can function as a liquid feed stop valve and the valve T2 can function as a flow rate control valve.
- the fluidic device in the present embodiment includes a plurality of valves, and the plurality of valves are arranged in series in the flow path, and function as a pump that causes flow in the fluid in the flow path by opening and closing the plurality of valves. It may be a thing.
- the fluid device in the present embodiment controls the opening and closing of a plurality of valves in synchronization with each other, thereby generating a wave in the fluid in the flow path and causing the fluid to flow in a predetermined direction (eg, flowing the fluid). In one direction).
- a predetermined direction eg, flowing the fluid.
- the timing of deformation of each valve element (diaphragm member) is shifted by a predetermined interval
- the fluid in the flow path can be fed in a predetermined direction by a so-called peristaltic system that controls the opening and closing of the valve.
- the type and operation method normally open method or normally close method
- individual valves arranged in the flow path may be the same or different.
- Exosomes lipid vesicles called exosomes (exosomes) are known and have attracted attention in recent years.
- Exosomes are, for example, lipid vesicles having a diameter of about 30 to 100 nm that are secreted from cells, and enclose biomolecules derived from cells that are secreted, such as proteins, nucleic acids, and miRNAs.
- Abnormal cells such as cancer cells existing in the body express specific proteins, nucleic acids, miRNAs, and the like inside the cell membrane.
- exosomes are detected in body fluids such as blood, urine, and saliva circulating in the body, analyzing exosomes can detect abnormalities in the body without performing a biopsy test. it can.
- the fluid device described above can be used for exosome analysis.
- the fluidic device may be a fluidic device that detects biomolecules contained in exosomes in a sample.
- a fluid device for example, a fluid device including the valve of the above embodiment, an exosome purification unit having a layer modified with a compound having a hydrophobic chain and a hydrophilic chain, and a biomolecule detection unit. Is mentioned.
- the fluid device 51 is a fluid device for detecting a biomolecule contained in an exosome in a sample, and includes an exosome purification unit 52 having a layer modified with a compound having a hydrophobic chain and a hydrophilic chain, and a biomolecule purification unit 53, a biomolecule detection unit 54, a first channel 55 that connects the exosome purification unit 52 and the biomolecule purification unit 53, and a second channel 56 that connects the biomolecule purification unit 53 and the biomolecule detection unit 54 And the valve of the above-described embodiment disposed at a desired location of each flow path.
- the fluidic device 51 of the present embodiment is a device that obtains a sample containing plasma from which blood cells have been removed from blood and detects biomolecules contained in the exosome in the sample supplied to the exosome purification unit 52.
- the first channel 55 is a channel for sending the exosome crushing liquid from the exosome purification unit 52 to the biomolecule purification unit 53
- the second channel 56 is a purified biomolecule. This is a flow path for feeding a solution containing the liquid to the biomolecule detection unit 54.
- the fluid device 51 of the present embodiment may further include waste liquid tanks 57, 58, and 59 as shown in FIG.
- the fluid device 51 of the present embodiment may further include waste liquid tanks 57, 58, and 59 as shown in FIG.
- FIG. 12 although the three waste liquid tanks are shown, you may concentrate on one or two waste liquid tanks.
- the exosome purification unit 52 is a part for fixing exosomes contained in the supplied sample and crushing the exosomes, and has an inlet and a layer modified with a compound having a hydrophobic chain and a hydrophilic chain. 52d. As shown in FIG. 13, the exosome purification unit 52 preferably includes an inlet for each reagent to be introduced.
- the exosome purification unit 52 preferably includes a sample introduction inlet 52b and a crushing liquid introduction inlet 52c, and more preferably includes a cleaning liquid introduction inlet 52a.
- the liquid of each part may be driven by an external suction pump, and the flow of the liquid may be controlled by opening and closing the valve of the first aspect of the present invention.
- a sample containing plasma is injected into the sample introduction inlet 52b, the valve 52f of the flow path 52i is opened, and the sample is aspirated by suction. 52d.
- the exosome in the sample introduced into the exosome fixing part 52d is captured by a compound having a hydrophobic chain and a hydrophilic chain.
- the compound having a hydrophobic chain and a hydrophilic chain in the exosome fixing part 52d is a compound having a hydrophobic chain for binding to the lipid bilayer membrane and a hydrophilic chain for dissolving the lipid chain. is there.
- an exosome having a lipid bilayer can be fixed on the exosome fixing part 52d.
- fixing the exosome on the exosome fixing part 52d includes adsorbing the exosome to the exosome fixing part. This makes it possible to isolate exosomes from the sample.
- Examples of the substrate used as the exosome fixing part 52d include a glass substrate, a silicon substrate, a polymer substrate, and a metal substrate.
- the substrate may bind the compound to the substrate surface via a substance that binds to the hydrophilic chain of the compound having a hydrophobic chain and a hydrophilic chain.
- examples of the substance include an amino group, a carboxyl group, a thiol group, a hydroxyl group, and an aldehyde group, and 3-aminopropyltriethoxysilane is preferable.
- the plasma contains extracellular vesicles such as microvesicles and apoptotic bodies in addition to exosomes, and these extracellular vesicles may be fixed to the exosome fixing part 52d. From the viewpoint of removing these extracellular vesicles from the exosome fixing part 52d, it is preferable to wash the exosomes on the exosome fixing part 52d.
- the exosome fixed to the exosome fixing part 52d is crushed.
- the valve 52g on the flow path 52j is opened, the crushing liquid is injected into the crushing liquid inlet 52c, and the crushing liquid is introduced into the exosome fixing part 52d by suction.
- the disruption solution include reagents used for cell lysis.
- the exosome fixing part 52d When the disrupted solution passes through the exosome fixing part 52d, the exosomes captured on the exosome fixing part 52d are crushed and the biomolecules contained in the exosome are released.
- the biomolecule released from the exosome is sent to the biomolecule purification unit 53 through the first channel 55 via the valve 55a.
- the biomolecule purification unit 53 preferably includes a biomolecule recovery liquid introduction inlet 53b and a biomolecule fixing section 53c, and more preferably includes a biomolecule cleaning liquid introduction inlet 53a. .
- the biomolecule fixed by the biomolecule fixing portion 53c is preferably miRNA.
- the biomolecule fixing part 53c is captured on the biomolecule fixing part 53c.
- the biomolecule fixed to the biomolecule fixing portion 53c is eluted.
- the valve 53f of the flow path 53g is opened, the biomolecule recovery liquid is injected into the biomolecule recovery liquid introduction inlet 53b, and the biomolecule recovery liquid is introduced into the biomolecule fixing portion 53c.
- the biomolecule is recovered from the biomolecule fixing portion 53c.
- the biomolecule passes through the second flow path 56 and is sent to the biomolecule detection unit 54.
- the biomolecule detection unit 54 includes, as an example, a substrate on which a substance having affinity for biomolecules is fixed.
- a substrate on which a substance having affinity for biomolecules is fixed it is preferable to include a substrate 54c on which a probe complementary to the target miRNA is fixed.
- the substrate on which a probe complementary to the target miRNA is immobilized include a DNA chip.
- the biomolecule detection unit 54 preferably further includes an inlet 54b for introducing a cleaning liquid.
- the valve 54d is opened, and the detection probe solution is injected into the detection probe introduction inlet 54a.
- the biomolecule and the detection probe solution are circulated and mixed in the biomolecule detection unit.
- a biomolecule in a sample can be quantified by labeling the biomolecule with a labeling substance and measuring the abundance of the labeling substance.
- the labeling substance include fluorescent substances and enzymes.
- the labeling substance may be a fluorescent substance.
- Biomolecules can be quantified by measuring the intensity of fluorescence generated when the fluorescent substance is irradiated with excitation light.
- the biomolecule may be previously labeled with a fluorescent substance.
- staining may be performed using, for example, a fluorescently labeled antibody.
- the fluorescence intensity of the fluorescent substance can be measured by a control unit such as a fluorescent microscope (not shown), a light source, and a personal computer.
- the analysis of exosomes conventionally required for one day or more can be quickly performed in about one hour.
- the biomolecule present on the surface of the exosome may be detected in the exosome purification unit.
- a method for detecting a biomolecule present on the surface of an exosome immobilized on a substrate is formed by allowing a biomolecule present on the surface of an exosome to interact with a first molecule that specifically binds to the biomolecule. And detecting a complex (first molecule-exosome complex) on the substrate.
- the method for detecting the first molecule-exosome complex is, for example, a step of detecting the fluorescence of the fluorescently labeled first molecule-exosome complex.
- a detection method using ELISA may be used.
- the interaction between the first molecule and the exosome is a binding reaction such as an antigen-antibody reaction.
- the first molecule is not limited to an antibody, and an aptamer is also preferably used.
- aptamers include nucleic acid aptamers and peptide aptamers.
- the exosome can be analyzed in two steps by performing detection of a biomolecule existing on the surface of the exosome as described above and detection of miRNA included in the exosome on the device.
- an abnormality in the living body can be detected by analyzing exosomes in blood circulating in the living body, for example, without performing a biopsy test.
- the fluid control method in the present embodiment is a fluid control method in the fluid device in the above-described embodiment, and the anchor portion of the valve in the above-described embodiment is not deformed while being fixed to the cylindrical structure, and the thin film portion is not deformed. It is deformed so as to project to the side of the flow path or the side opposite to the flow path.
- the fluid control method includes, for example, a substrate having a first surface in contact with a fluid and having a through-hole formed therein, and at least a central portion fitted into the opening of the first surface of the through-hole.
- a fluid control structure including an elastically deformable valve body and a drive unit that deforms the valve body in a direction perpendicular to the axis of the flow path (a direction perpendicular to a direction in which the fluid flows in the flow path) May be.
- the fluid control method includes a cylindrical structure having an outer cylinder part and an inner cylinder part, a thin film part arranged so as to cover one end of the inner cylinder part, and a circumference of the thin film part.
- a valve having a diaphragm member having an inner wall of the outer cylinder part and an anchor part closely attached along the outer wall of the inner cylinder part is disposed in the flow path, and the anchor part is fixed to the cylindrical structure.
- the thin film portion is deformed so as to project to the side of the flow path or the side opposite to the flow path without being deformed.
- the fluid control method described above deforms the thin film portion of the diaphragm member by introducing a fluid from an external device into the inner tube portion of the outer tube portion and the inner tube portion constituting the valve.
- a fluid from an external device into the inner tube portion of the outer tube portion and the inner tube portion constituting the valve.
- the fluid include air, nitrogen, water, and the like.
- the deformation of the thin film portion so as to project to the side of the flow path or the opposite side of the flow path is, for example, that the thin film portion is perpendicular to the axis of the flow path (the cylindrical structure constituting the valve). Deformation in the axial direction).
- Such deformation can be performed by, for example, a driving unit for deforming the thin film portion.
- a driving unit for example, a pump that injects or discharges fluid such as air, which serves as power for deforming the thin film portion of the diaphragm member, into the inner cylinder portion constituting the valve.
- the driving unit bulges and deforms the thin film unit so as to project to the side of the channel or the side opposite to the channel, so that the fluid flows through the channel (the fluid flows).
- the state may be changed from a possible state) to a closed state (state in which fluid cannot flow) in which the flow of fluid in the flow path is blocked.
- FIG. 6A and 6B are diagrams illustrating an embodiment of a fluid control method.
- FIG. 6A is an XZ plane cross-sectional view (cross-sectional view including an axis of a cylindrical structure) of a fluidic device 600 according to an embodiment.
- the fluidic device 600 includes a first substrate 660 and a second substrate 670.
- the first substrate 660 includes a cylindrical structure having an outer cylinder portion 610 and an inner cylinder portion 620, a thin film portion 630, an anchor portion 640, and the like.
- a valve having a diaphragm member having a connection portion 635 is provided, and the diaphragm member is exposed on the first surface 665 of the first substrate 660.
- the second substrate 670 has a second surface 675 on which a flow path 680 is formed.
- the fluid device 600 has the first substrate 660 and the second substrate so that the first surface 665 and the second surface 675 face each other, and the flow path 680 traverses just above the diaphragm member. And 670 are bonded together.
- FIG. 6A shows a state where fluid can flow (pass through) the flow path 680.
- FIG. 6B shows a state in which the flow of fluid inside the flow path 680 is blocked by deforming the thin film portion 630 so as to project toward the flow path 680, and the fluid cannot flow (cannot pass). Yes.
- the deformation of the thin film portion 630 is performed by injecting (pressurizing) or discharging (depressurizing) a fluid such as air into the inner cylinder portion 620 out of the outer cylinder portion 610 and the inner cylinder portion 620 constituting the valve. This is done by controlling
- the diaphragm member is firmly fixed to the cylindrical structure by the anchor portion 640, and the diaphragm member is removed from the cylindrical structure. There is no peeling.
- the case where the thin film portion of the diaphragm member constituting the valve swells outside the hole and closes the flow path has been described as an example of the fluid control method.
- the above operation method is not limited to this case, and the diaphragm member constituting the valve is recessed (retracted) inside the hole (opposite the flow path) to open the previously closed flow path.
- a system normally closed system
- This latter mode of operation will be described below.
- FIG. 7A is an XZ plane cross-sectional view (cross-sectional view including an axis of a cylindrical structure) of a fluidic device 700 according to an embodiment.
- the fluidic device 700 includes a first substrate 760 and a second substrate 770.
- the first substrate 760 includes a cylindrical structure having an outer cylinder portion 710 and an inner cylinder portion 720, a thin film portion 730, an anchor portion 740, and the like. And a diaphragm member having a connecting portion 735, and the diaphragm member is exposed on the first surface 765 of the first substrate 760.
- the second substrate 770 has a second surface 775 on which a flow path 780 is formed.
- the fluid device 700 has the first substrate 760 and the second substrate so that the first surface 765 and the second surface 775 are opposed to each other and the flow path 780 traverses just above the diaphragm member. And 770 are bonded together.
- the channel 780 is provided with a projection 770h at the dividing portion 780b. Since the projection 770h is in close contact with the thin film portion 730 of the opposing diaphragm member, the flow path 780 is closed at the dividing portion 780b. This state indicates a state (closed state) where the flow of fluid inside the flow path 780 is blocked and the fluid cannot flow.
- this state shows a state (open state) in which fluid can flow through the flow path 780.
- the diaphragm member is firmly fixed to the cylindrical structure by the anchor portion 740, and the diaphragm member is removed from the cylindrical structure. There is no peeling.
- the manufacturing method of the valve in the present embodiment includes an outer tube portion, an inner tube portion, and a cylindrical structure including a holding member that fixes a relative position of the outer tube portion and the inner tube portion.
- equation (1) is a model equation, it may deviate from experimentally measured values.
- “satisfy equation (1)” means that the Hh value (theoretical value) and the actual measurement value of Hh calculated based on equation (1) satisfy the following equation (A1). Means that. In Formula (A1), ⁇ includes 20, includes 10, includes 5, and includes ⁇ .
- the h and the H may satisfy the following formula (A3), and in the following formula (A3), ⁇ is 10 including 20; Including 5, including.
- the method for manufacturing a valve includes a step of closing a first end portion of a through-hole opened in a first surface of a substrate with a lid member, and a step of injecting a raw material of a diaphragm member from the second end portion of the through-hole And a step of forming a diaphragm member fitted into the first end of the through hole and a step of removing the lid member by solidifying the raw material and having a thin film at least in the center. It may be a manufacturing method.
- FIG. 8 is a perspective view showing an example of the cylindrical structure 800 used in the process A.
- the cylindrical structure 800 includes an outer cylinder part 810, an inner cylinder part 820, and a holding member 890 that fixes the relative positions of the outer cylinder part 810 and the inner cylinder part 820.
- the inner wall 815 of the outer cylinder portion 810 may be an inner wall of a hole opened in the substrate 860.
- the outer wall of the outer cylinder portion 810 may be integrated with the substrate 860.
- the shape and the number of the holding members 890 are not particularly limited, and any shape and number may be used as long as the relative positions of the outer cylinder part 810 and the inner cylinder part 820 can be fixed.
- the holding member 890 is composed of four columnar structures that connect the outer cylinder portion 810 and the inner cylinder portion 820.
- the space existing between the inner wall 815 of the outer cylinder portion 810 and the outer wall 826 of the inner cylinder portion 820 is open to the atmosphere. Further, the height of the inner cylinder part 820 is lower than the height of the outer cylinder part 810, and the inner cylinder part 820 does not reach the bottom surface of the outer cylinder part 810. Further, the heights of the upper surfaces of the inner cylinder part 820 and the outer cylinder part 810 are uniform.
- the inner cylinder part 810 and the outer cylinder part 820 are both cylindrical.
- the shapes of the outer cylinder part and the inner cylinder part are not particularly limited. It may be a polygonal cylinder such as a triangular cylinder, a square cylinder, or a hexagonal cylinder.
- the outer cylinder part and the inner cylinder part may have the same shape or different shapes.
- FIG. 9 is a diagram illustrating a method for manufacturing the valve.
- a cylindrical structure 900 including an outer cylinder portion 910, an inner cylinder portion 920, and a holding member (not shown) that fixes the relative positions of the outer cylinder portion 910 and the inner cylinder portion 920.
- a polymer composition m having a surface tension of ⁇ , a contact angle with respect to the cylindrical structure of ⁇ , and a density of ⁇ .
- the polymer composition m is a material for the diaphragm member.
- the polymer composition m is injected into the inner cylinder part 920 among the outer cylinder part 910 and the inner cylinder part 920.
- the material constituting the cylindrical structure 900 is not particularly limited, and for example, materials such as resin (plastic), glass, ceramics, metal, and semiconductor can be applied.
- materials such as resin (plastic), glass, ceramics, metal, and semiconductor can be applied.
- a transparent material such as resin or glass is used as a substrate material so that the fluid flowing through the device can be visually recognized from the outside. Also good.
- the thickness of the substrate 960 should be, for example, about 0.1 to 5.0 cm. From the viewpoint of easy processing, the thickness can be, for example, about 0.5 to 2.0 cm.
- the inner diameter of the outer cylindrical portion 910 of the cylindrical structure 900 may be appropriately set depending on the width and height (depth) of the flow path in which the valve is disposed. It can be about 1.0 to 10 mm.
- the method of forming the configuration of the inner cylinder portion 920, the holding member 990, and the like on the substrate 960 is not particularly limited, and an example is a method of cutting the surface of the substrate using a commercially available 3D input / output device.
- the polymer composition m may be any material that can be deformed in the axial direction of the cylindrical structure 900 in accordance with a change in pressure inside the inner cylindrical portion 920, and an example thereof is an elastomer.
- an elastomer one made of a known polymer compound can be applied.
- An example of an elastomeric material is PDMS.
- the bottom surface of the cylindrical structure 900 may be closed by bringing the lid member F into close contact with the first surface 910a.
- the lid member F is not particularly limited as long as it is a member that can block the bottom surface of the cylindrical structure 900 and can be removed in a subsequent process.
- a resin release film is applicable. For example, by sticking a release film to the entire first surface 910a of the substrate 960 on which a plurality of cylindrical structures 900 are formed, the bottom surfaces of the plurality of cylindrical structures 900 can be temporarily blocked.
- the thickness of the thin film portion of the diaphragm member is not particularly limited as long as it is a thickness that can be deformed in the axial direction of the cylindrical structure with an appropriate pressure, and is set according to the type and property of the constituent material of the diaphragm member. That's fine.
- the thickness of the thin film portion can be about 1 to 1000 ⁇ m, for example.
- the thickness of the central portion of the thin film portion may be the above level. When the thickness is in this range, it can be sufficiently deformed with a relatively small pressure change.
- valve manufacturing method in the present embodiment can adjust the thickness of the thin film portion of the diaphragm member by adjusting the injection amount of the polymer composition m.
- This injection method is not particularly limited, and as an example, as shown in FIG. 9, a method of injecting the liquid polymer composition m before curing by positioning the nozzle of the dispenser D above the cylindrical structure 900 is mentioned. It is done.
- step B the outer circumference of the thin film portion 930 having a height h, which is disposed so as to cover the one end 923 of the inner cylinder portion, flows around the periphery of the thin film portion 930, and the outer cylinder
- equation (1) will be described.
- the polymer composition m When the polymer composition m is injected into the cylindrical structure 900, the polymer composition m flows, and the polymer composition m stops flowing when it reaches an equilibrium state.
- the left side of the formula (1) represents the sum of the surface tension per unit area applied to the anchor portion and the gravity per unit area applied to the polymer composition m.
- the right side of Formula (1) represents the sum of the surface tension per unit area in the thin film portion and the gravity per unit area applied to the polymer composition m.
- L1 of Formula (1) means the length of the contact line where the polymer composition m is in contact with the wall surface of the cylindrical structure 900 at the anchor portion.
- L2 means the length of the contact line where the polymer composition m contacts the wall surface of the cylindrical structure 900 in the thin film portion.
- step C the polymer composition m whose flow has stopped is cured. Curing is performed inside the cylindrical structure.
- the method for curing the polymer composition m is not particularly limited, and conventional methods such as heating and ultraviolet irradiation can be applied according to the characteristics of the polymer composition m to be used.
- the polymer composition m is a two-component mixed resin composition in which a main agent and a crosslinking agent (curing agent) are mixed, it can be cured naturally after a certain period of time has passed after injection. .
- the substrate 960 on which the target valve is formed can be obtained by removing the cover material F.
- the lid material F is a known release film attached to the first surface 910a of the substrate 960, the lid material F can be easily peeled off and removed.
- a plurality of valves can be manufactured simultaneously by the valve manufacturing method according to this embodiment.
- FIG. 10 is a cross-sectional view showing a cross section including an axis of a cylindrical structure in which both the outer cylindrical portion and the inner cylindrical portion are cylindrical.
- f ⁇ and f g can be represented by the following formulas (C1) and (C2), respectively.
- ⁇ represents the surface tension of the polymer composition m
- ⁇ represents the contact angle of the polymer composition m with respect to the cylindrical structure
- r represents the radius of the circle formed by the inner wall of the inner cylinder portion.
- ⁇ represents the density of the polymer composition m
- g represents the gravitational acceleration
- r is the same as in the formula (C1)
- h is the height of the polymer composition m in the thin film portion of the diaphragm member.
- F ⁇ and F g can be represented by the following formulas (C3) and (C4), respectively.
- ⁇ and ⁇ are the same as in the formula (C1), and R represents the radius of a circle formed by the outer wall of the inner cylinder portion.
- ⁇ R indicates the length from the inner wall of the outer cylinder part to the outer wall of the inner cylinder part (the length obtained by subtracting R from the radius of the circle formed by the inner wall of the outer cylinder part).
- ⁇ and g are the same as in the formula (C2)
- R and ⁇ R are the same as in the formula (C3)
- H represents the height of the polymer composition m at the anchor portion of the diaphragm member.
- Hh> 0 may be satisfied.
- the condition for Hh> 0 is that cos ⁇ > 0, that is, the contact angle ⁇ of the polymer composition m with respect to the cylindrical structure is 0 ⁇ ⁇ 90 degrees, and It turns out that it is satisfy
- formula (C7), etc. selecting a polymer composition m having physical properties such as ⁇ , ⁇ , ⁇ , etc. according to the purpose, and designing the shape and size of the cylindrical structure.
- the amount of the polymer composition m to be injected into the cylindrical structure the Hh of the valve to be manufactured and the film thickness of the thin film portion can be manufactured as designed.
- MDX-540 manufactured by Roland DG
- a cylindrical structure was formed.
- the height of the inner cylinder part was 0.5 mm shorter than the height (5 mm) of the outer cylinder part. 5 is 1 mm
- R + ⁇ R is 2.5 mm
- R ⁇ r is 0.8 mm
- ⁇ R is 0.7 mm
- r in FIG. 5 is 1.4 mm.
- R + ⁇ R is 2.5 mm
- R ⁇ r is 0.4 mm
- ⁇ R is 0.7 mm.
- Two types of cylindrical structures were produced.
- a film (trade name “SPV-P-6030”, manufactured by Nitto Denko Corporation) was attached as a lid material to the substrate on which the cylindrical structure was formed.
- a precision dispenser (trade name “Nano Master SMP-III”, manufactured by Musashi Engineering Co., Ltd.) and a robot (trade name “SHOTMASTER 200DS”, manufactured by Musashi Engineering Co., Ltd.)
- the polymer composition is placed inside the cylindrical structure. 35-50 ⁇ L was injected.
- a 15: 1 (v / v) mixture (Sylgard 184, manufactured by Dow Corning) of PDMS (main agent) and a curing agent (crosslinking agent) was used.
- the polymer composition was allowed to stand for 10 minutes, which is sufficient for the flow of the polymer composition to reach an equilibrium state, and then heated to 80 ° C. in an oven to cure the polymer composition. Thereafter, the film used as the lid was peeled off to complete the valve.
- the surface tension ⁇ of PDMS is 21.6 dyn / cm, the contact angle ⁇ of the PDMS with respect to the cylindrical structure is 20 degrees, and the density ⁇ of PDMS is 1.11 g / cm 3. ),
- the above measured values of Hh were close to these theoretical values.
- FIG. 16 is a graph showing the relationship between the applied pressure and the amount of deformation of the thin film portion of the valve and a photograph of the valve. From this result, it became clear that an applied pressure of 0.1 MPa or more is necessary to block a flow path having a height of 500 ⁇ m with the valve of this experimental example.
- the channel 1780a was filled with a 0.05 w / w% aqueous solution of sulforhodamine B (Kanto Chemical), which is a fluorescent substance, and the operation of the bulb was observed.
- the fluorescence from the region in contact with the thin film portion 1730 of the bulb in the flow path 1780a was measured.
- the fluorescence of sulforhodamine B is transmitted to the avalanche photodiode (APD, trade name “C5460”, Hamamatsu Photonics) through the aperture (trade name “ID15 / M”, Thorlabs) and the lens (trade name “LA1805”, Thorlabs). Introduced.
- the analog signal from the APD was converted into a digital signal using an input module (trade name “NIUSB-6008”, National Instruments).
- FIG. 17B is a graph showing the relationship between the applied pressure of nitrogen gas supplied to the inside of the inner cylindrical portion of the valve through the flow path 1780b and the measured fluorescence intensity, and a photograph near the valve of the fluid device.
- the fluorescence intensity decreased as the pressure applied to the bulb increased.
- a decrease in fluorescence intensity due to deformation of the thin film portion was observed from an applied pressure of 0.1 MPa, and complete closure of the bulb was achieved at an applied pressure of about 0.2 MPa.
- damage to the thin film portion of the valve was not observed even under an applied pressure of 0.4 MPa.
- Example 4 (Response speed evaluation) Using the fluid device of Experimental Example 3, the temporal relationship between the valve control voltage, the opening and closing of the valve (the amount of deformation of the thin film portion), and the pressure applied to the valve was measured.
- FIG. 18 is a graph showing the results of this experimental example. As a result, it became clear that the valve can be opened and closed in 60 milliseconds after the valve control voltage is applied.
- FIG. 19B is a graph showing the relationship between the driving frequency of the peristaltic pump and the liquid delivery flow rate. As shown in the graph, the driving frequency and the liquid feeding flow rate are in a monotonically increasing relationship, indicating that the peristaltic pump operates normally.
- a valve excellent in durability a fluid device including the valve, a fluid control method using the valve, and a method of manufacturing a valve excellent in durability.
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Abstract
Description
本願は、2014年7月7日に日本に出願された特願2014-140066号に基づき優先権を主張し、その内容をここに援用する。
[1]本発明の一実施態様におけるバルブは、外筒部と内筒部とを有する筒状構造体と、内筒部の一端を覆うように配置された薄膜部と、薄膜部の周縁を一周し、外筒部の内壁及び内筒部の外壁に沿って密着したアンカー部と、を有するダイアフラム部材と、を備えたバルブが提供される。
[2]本発明の一実施態様におけるバルブは、流路に配設されるバルブであって、内径2(R+ΔR)の円筒形である外筒部と、内径2r、外径2Rの円筒形である内筒部と、を有する筒状構造体と、内筒部の一端を覆うように配置された薄膜部と、薄膜部の周縁を一周し、外筒部の内壁及び内筒部の外壁に沿って密着したアンカー部と、を有するダイアフラム部材と、を備え、r及びΔRが下記式(a)を満たす。
ΔR<r …(a)
[3]本発明の一実施態様におけるバルブは、流路に配設されるバルブであって、流体に接する第一面に開口部を有する孔が設けられた第一部材と、前記開口部の内部に設けられた第二部材と、前記第二部材の一端を覆うように配置された薄膜部と、前記第二部材の形状に応じて設けられるアンカー部と、前記薄膜部と前記アンカー部との間に設けられて前記第二部材の一端の面に密着して固定されている接続部と、を有し、前記薄膜部と前記アンカー部と前記接続部とが一体的に形成されたダイアフラム部材と、を備える。
[4]本発明の一実施態様におけるバルブは、貫通孔を有し、少なくとも二重の筒状構造体と、前記筒状構造体の第一筒部の一端を覆うように配置された薄膜部と、前記薄膜部と一体に形成され、前記筒状構造体の第二筒部の内壁と前記第一筒部の外壁との間に位置するアンカー部と、を有するダイアフラム部材と、を備える。
[5]本発明の一実施態様における流体デバイスは、上記のバルブと、バルブが配置された流路とを備える。
[6]本発明の一実施態様における流体デバイスは、上記のバルブを複数備え、複数のバルブのうち少なくとも1つは、他のバルブと薄膜部の高さが異なっている。
[7]本発明の一実施態様における流体デバイスは、上記のバルブを備え、第一面にダイアフラム部材が露出した第一基板と、流路が形成された第二面を有する第二基板と、を備え、第一面と第二面とを対向させて、流路がダイアフラム部材の直上を横断するように第一基板と第二基板とを貼り合わせた。
[8]本発明の一実施態様における流体制御方法は、上記の流体デバイスにおける流体制御方法であって、アンカー部は固定されたまま変形させず、薄膜部を流路の側又は流路と反対側に張り出すように変形させる。
[9]本発明の一実施態様における流体制御方法は、外筒部と内筒部とを有する筒状構造体と、内筒部の一端を覆うように配置された薄膜部と、薄膜部の周縁を一周し、外筒部の内壁及び内筒部の外壁に沿って密着したアンカー部と、を有するダイアフラム部材と、を備えたバルブを流路に配設し、アンカー部は固定されたまま変形させず、薄膜部を流路の側又は流路と反対側に張り出すように変形させる。
[10]本発明の一実施態様におけるバルブの製造方法は、外筒部と、内筒部と、前記外筒部及び前記内筒部の相対的な位置を固定する保持部材とを備える筒状構造体の内部に、表面張力がγであり、前記筒状構造体に対する接触角がθであり、密度がρであるポリマー組成物を注入する工程と、前記ポリマー組成物が流動し、前記内筒部の一端を覆うように配置された、高さhを有する薄膜部と、前記薄膜部の周縁を一周し、前記外筒部の内壁及び前記内筒部の外壁に密着し、高さHを有するアンカー部とを形成し、前記筒状構造体の軸方向に対して垂直な断面C1において、前記外筒部の内壁及び前記内筒部の外壁によって囲まれる領域の面積S1、前記断面C1における前記外筒部の内壁及び前記内筒部の外壁の長さの和L1、前記断面C1において前記内筒部の内壁によって囲まれる領域の面積S2、前記断面C1における前記内筒部の内壁の長さL2、前記h及び前記Hが、下記式(1)を満たした段階で前記ポリマー組成物の流動が停止する工程と、流動が停止した前記ポリマー組成物を硬化させる工程と、を含むことを特徴とする。
(γcosθ×L1)/S1-ρg×H=(γcosθ×L2)/S2-ρg×h …(1)
[式中、gは重力加速度を示す。]
[11]本発明の一実施態様におけるバルブの製造方法は、外筒部と内筒部とを有し、前記内筒部の第一端部は前記外筒部の第一端部よりも軸方向に奥側に配置された筒構造体の第一端部を蓋材で塞ぐ工程と、前記筒状構造体の第二端部からダイアフラム部材の原料を注入する工程と、前記原料を固化させることにより、前記内筒部の一端を覆うように配置された薄膜部と前記外筒部の内壁及び前記内筒部の外壁に密着したアンカー部とから成るダイアフラム部材を形成する工程と、前記蓋材を取り外す工程と、を含む。
図3は、本発明の第一実施態様であるバルブを備えた積層基板20の一例である。積層基板20の内部に設けられたトンネル状の流路21において、図中の矢印で示すX軸の正方向に液体、気体等の流体が流通する。流路21の途中には、流路21の内径が他の部分よりも小さくされた小径部21aが形成されている。本実施形態のバルブ1は、例えば、流路21の小径部21aの下方(図3におけるZ軸の負方向)、又は流路21の所定位置に配設されている。
図4Aは、第一実施形態のバルブ400のXZ面断面図(下記中心軸450を含む断面図)である。図4Aに示すバルブ400は、外筒部410と内筒部420とを有する筒状構造体と、内筒部420の一端423を覆うように配置された薄膜部430と、薄膜部430の周縁を一周し、外筒部410の内壁415及び内筒部420の外壁426に沿って密着したアンカー部440と、を有するダイアフラム部材と、を備える。
図4A及び図4Bに示すように、第一実施形態のバルブ400において、薄膜部430は高さhを有しており、アンカー部440は高さHを有しており、上記のダイアフラム部材は、ポリマー組成物を硬化させることにより形成されたものであり、該ポリマー組成物は、表面張力がγであり、上記した筒状構造体に対する接触角がθであり、密度がρであり、筒状構造体の軸方向Z(中心軸450の軸方向)に対して垂直な断面C1(C1-C1線断面)において、外筒部410の内壁415及び内筒部420の外壁426によって囲まれる領域の面積S1、断面C1における外筒部の内壁415及び内筒部の外壁426の長さの和L1、断面C1において、内筒部420の内壁428によって囲まれる領域の面積S2、断面C1における内筒部420の内壁428の長さL2、薄膜部430の高さ(筒状構造体の軸方向Zにおける高さ、薄膜部の膜厚)h及びアンカー部440の高さ(筒状構造体の軸方向Zにおける高さ)Hが、下記式(1)を満たしていてもよい。なお、式(1)の技術的な意味については後述する。
(γcosθ×L1)/S1-ρg×H=(γcosθ×L2)/S2-ρg×h …(1)
[式中、gは重力加速度を示す。]
第二実施形態のバルブにおいて、外筒部及び内筒部は、共に円筒形であってもよい。図5は、第三実施形態のバルブ500のXZ面断面図(筒状構造体の軸線を含む断面図)である。バルブ500において、内筒部520は、内径2r、外径2Rの円筒形であり、外筒部510は、内径2(R+ΔR)の円筒形であり、筒状構造体の軸方向Zに対して垂直な断面C1(C1-C1線断面)において、外筒部510の内壁515及び内筒部520の外壁526によって囲まれる領域の面積S1が、S1=π{(R+ΔR)2-R2}を満たし、前記断面C1における前記外筒部の内壁515及び前記内筒部の外壁526の長さの和L1が、L1=2π{(R+ΔR)+R}を満たし、前記断面C1において、前記内筒部520の内壁528によって囲まれる領域の面積S2が、S2=πr2を満たし、前記断面C1における前記内筒部520の内壁528の長さL2が、L2=2πrを満たし、薄膜部530の高さ(筒状構造体の軸方向Zにおける高さ、薄膜部の膜厚)h及びアンカー部540の高さ(筒状構造体の軸方向Zにおける高さ)Hが、下記式(2)を満たしていてもよい。式(2)は、上記式(1)を、外筒部及び内筒部が円筒形である場合について変形したものである。
(γcosθ×2π{(R+ΔR)+R})/π{(R+ΔR)2-R2}-ρg×H=(γcosθ×2πr)/πr2-ρg×h …(2)
[式中、gは重力加速度を示す。]
上記した第三実施形態のバルブは、流路に配設されるものであり、上記のr及び上記のΔRが下記式(a)を満たしていてもよい。
ΔR<r …(a)
ΔR<r …(a)
本実施形態における流体デバイスは、上述したバルブを少なくとも1つ備えた流体デバイスである。なお、本実施形態における流体デバイスを構成する流路及びバルブは、マイクロメートルのスケールであっても、ミリメートルのスケールであってもよい。何れのスケールの流体デバイスについても、微細な流路を有するデバイスという意味において、「マイクロ流体デバイス」と呼ぶことができる。
本実施形態における流体デバイスは、複数のバルブを備え、該複数のバルブは流路に直列的に配設され、該複数のバルブの開閉により該流路中の流体に流れを起こすポンプとして機能するものであってもよい。
ところで、エクソソーム(エキソソーム)と呼ばれる脂質小胞が知られており、近年注目されている。エクソソームは、例えば、細胞から分泌される、直径30~100nm程度の脂質小胞であり、分泌元の細胞由来の生体分子、例えばタンパク質、核酸、miRNAなどを内包している。生体内に存在するがん細胞等の異常細胞は、その細胞膜の内部に特有のタンパク質や核酸、miRNAなどを発現している。
本実施形態における流体制御方法は、上述した実施形態の流体デバイスにおける流体制御方法であって、上述した実施形態のバルブのアンカー部は筒状構造体に固定されたまま変形させず、薄膜部を流路の側又は流路と反対側に張り出すように変形させるものである。
本実施形態におけるバルブの製造方法は、外筒部と、内筒部と、前記外筒部及び前記内筒部の相対的な位置を固定する保持部材とを備える筒状構造体の内部に、表面張力がγであり、前記筒状構造体に対する接触角がθであり、密度がρであるポリマー組成物を注入する工程(工程A)と、前記ポリマー組成物が流動し、前記内筒部の一端を覆うように配置された、高さhを有する薄膜部と、前記薄膜部の周縁を一周し、前記外筒部の内壁及び前記内筒部の外壁に密着し、高さHを有するアンカー部とを形成し、前記筒状構造体の軸方向に対して垂直な断面C1において、前記外筒部の内壁及び前記内筒部の外壁によって囲まれる領域の面積S1、前記断面C1における前記外筒部の内壁及び前記内筒部の外壁の長さの和L1、前記断面C1において前記内筒部の内壁によって囲まれる領域の面積S2、前記断面C1における前記内筒部の内壁の長さL2、前記h及び前記Hが、下記式(1)を満たした段階で前記ポリマー組成物の流動が停止する工程(工程B)と、流動が停止した前記ポリマー組成物を硬化させる工程(工程C)と、を含む。
(γcosθ×L1)/S1-ρg×H=(γcosθ×L2)/S2-ρg×h …(1)
[式中、gは重力加速度を示す。]
図9は、バルブの製造方法を説明する図である。工程Aにおいて、外筒部910と、内筒部920と、前記外筒部910及び前記内筒部920の相対的な位置を固定する保持部材(図示せず)とを備える筒状構造体900の内部に、表面張力がγであり、前記筒状構造体に対する接触角がθであり、密度がρであるポリマー組成物mを注入する。ポリマー組成物mはダイアフラム部材の材料である。ポリマー組成物mは、外筒部910と内筒部920とのうち内筒部920の内部に注入される。
工程Bにおいて、ポリマー組成物mが流動し、前記内筒部の一端923を覆うように配置された、高さhを有する薄膜部930と、前記薄膜部930の周縁を一周し、前記外筒部910の内壁915及び前記内筒部920の外壁926に密着し、高さHを有するアンカー部940とを形成し、前記筒状構造体の軸方向に対して垂直な断面C1において、前記外筒部910の内壁915及び前記内筒部920の外壁926によって囲まれる領域の面積S1、前記断面C1における前記外筒部910の内壁915及び前記内筒部920の外壁926の長さの和L1、前記断面C1において、前記内筒部920の内壁928によって囲まれる領域の面積S2、前記断面C1における前記内筒部920の内壁928の長さL2、前記h及び前記Hが、下記式(1)を満たした段階で前記ポリマー組成物mの流動が停止する。
(γcosθ×L1)/S1-ρg×H=(γcosθ×L2)/S2-ρg×h …(1)
[式中、gは重力加速度を示す。]
工程Cにおいて、流動が停止した前記ポリマー組成物mを硬化させる。硬化は、筒状構造体の内部で行う。ポリマー組成物mを硬化させる方法は特に制限されず、使用するポリマー組成物mの特性に応じて、例えば加熱、紫外線照射等の常法が適用できる。また、一例として、ポリマー組成物mが、主剤と架橋剤(硬化剤)とを混合させた二液混合型の樹脂組成物であれば、注入後に一定時間経過すると、自然に硬化させることができる。
ΔR<r …(a)
図5に示すバルブを作製し、バルブの材料であるPDMSの高さ(図5におけるH及びh)を実測した。なお、第三実施形態のバルブは、外筒部及び内筒部が共に円筒形である。
(機械的強度の評価)
実験例1と同様のバルブ(r=1mm)を作製し、バルブの機械的強度を検討した。ダイアフラム部材の材質としてはPDMSを使用した。図15に示す装置を組み立て、バルブの内筒部の内部に窒素ガスを注入して加圧し、印加圧力とバルブの薄膜部の変形量を測定した。
(開閉試験)
図17Aに示すように、100×80×5mmのサイズの基板に、断面が0.5×2mmの長方形であり、導入口1780cと排出口1780dの直径が3mmである流路1780aと、当該流路に配設された実験例1と同様のバルブ(r=1mm)と、当該バルブの内筒部の内部に窒素を供給する流路1780bを備える流体デバイス1700を作製した。
(応答速度評価)
実験例3の流体デバイスを用いて、バルブ制御用電圧、バルブの開閉(薄膜部の変形量)、バルブへの印加圧力の時間的な関係を測定した。図18は、本実験例の結果を示すグラフである。その結果、バルブ制御用電圧を印加してから60ミリ秒でバルブを開閉できることが明らかとなった。
(ペリスタルティックポンプの作製)
図19Aに示すように、流路上に実験例1と同様のバルブ(r=1mm)を3個直列に配置した流体デバイス(ペリスタルティックポンプ)を作製した。各バルブを1/2周期ごとに開閉させ、また、隣り合うバルブの動作に1/4周期ずつのずれを生じさせ、流路内の液体を送液した。駆動周波数を変化させて、送液流量を測定した。
Claims (26)
- 外筒部と内筒部とを有する筒状構造体と、
前記内筒部の一端を覆うように配置された薄膜部と、前記薄膜部の周縁を一周し、前記外筒部の内壁及び前記内筒部の外壁に沿って密着したアンカー部と、を有するダイアフラム部材と、
を備えたバルブ。 - 前記内筒部の外壁面は連続する面であり、
前記内筒部の外壁面に密着した前記アンカー部の面は連続する面である、
請求項1に記載のバルブ。 - 前記外筒部の内壁面は連続する面であり、
前記外筒部の内壁面に密着した前記アンカー部の面は連続する面である、
請求項1又は請求項2に記載のバルブ。 - 前記内筒部の内壁面は連続する面であり、
前記内筒部の内壁面に密着した薄膜部の面は連続する面である、
請求項1~3のいずれか一項に記載のバルブ。 - 前記薄膜部と前記アンカー部とは、連続して一体に形成されている、請求項1~4のいずれか一項に記載のバルブ。
- 前記ダイアフラム部材は前記薄膜部と前記アンカー部との間に設けられた接続部を備え、前記接続部は前記内筒部の一端の面に密着して固定されている、請求項1~5のいずれか一項に記載のバルブ。
- 前記筒状構造体において、前記外筒部の内壁と前記内筒部の外壁との間に存在する空間は開放されている、請求項1~6のいずれか一項に記載のバルブ。
- 前記内筒部において、前記薄膜部が配置される一端とは異なる端部は開放されている、請求項1~7のいずれか一項に記載のバルブ。
- 前記薄膜部は高さhを有し、
前記アンカー部は高さHを有し、
前記ダイアフラム部材は、ポリマー組成物を硬化させることにより形成されたものであり、
前記ポリマー組成物は、表面張力がγであり、前記筒状構造体に対する接触角がθであり、密度がρであって、
前記筒状構造体の軸方向に対して垂直な断面C1において、前記外筒部の内壁及び前記内筒部の外壁によって囲まれる領域の面積S1、前記断面C1における前記外筒部の内壁及び前記内筒部の外壁の長さの和L1、前記断面C1において前記内筒部の内壁によって囲まれる領域の面積S2、前記断面C1における前記内筒部の内壁の長さL2、前記h及び前記Hが、下記式(1)を満たす、請求項1~8のいずれか一項に記載のバルブ。
(γcosθ×L1)/S1-ρg×H=(γcosθ×L2)/S2-ρg×h …(1)
[式中、gは重力加速度を示す。] - 前記内筒部は、内径2r、外径2Rの円筒形であり、
前記外筒部は、内径2(R+ΔR)の円筒形であり、
前記S1が、S1=π{(R+ΔR)2-R2}を満たし、
前記L1が、L1=2π{(R+ΔR)+R}を満たし、
前記S2が、S2=πr2を満たし、
前記L2が、L2=2πrを満たし、
前記h及び前記Hが、下記式(2)を満たす、請求項9に記載のバルブ。
(γcosθ×2π{(R+ΔR)+R})/π{(R+ΔR)2-R2}-ρg×H=(γcosθ×2πr)/πr2-ρg×h …(2)
[式中、gは重力加速度を示す。] - 流路に配設されるバルブであって、
内径2(R+ΔR)の円筒形である外筒部と、内径2r、外径2Rの円筒形である内筒部と、を有する筒状構造体と、
前記内筒部の一端を覆うように配置された薄膜部と、前記薄膜部の周縁を一周し、前記外筒部の内壁及び前記内筒部の外壁に沿って密着したアンカー部と、を有するダイアフラム部材と、を備え、
前記r及び前記ΔRが下記式(a)を満たす、バルブ。
ΔR<r …(a) - 流路に配設されるバルブであって、
流体に接する第一面に開口部を有する孔が設けられた第一部材と、
前記開口部の内部に設けられた第二部材と、
前記第二部材の一端を覆うように配置された薄膜部と、前記第二部材の形状に応じて設けられるアンカー部と、前記薄膜部と前記アンカー部との間に設けられて前記第二部材の一端の面に密着して固定されている接続部と、を有し、前記薄膜部と前記アンカー部と前記接続部とが一体的に形成されたダイアフラム部材と、
を備えるバルブ。 - 前記第二部材は連続する面を有する部材である、請求項12に記載のバルブ。
- 貫通孔を有し、少なくとも二重の筒状構造体と、
前記筒状構造体の第一筒部の一端を覆うように配置された薄膜部と、前記薄膜部と一体に形成され、前記筒状構造体の第二筒部の内壁と前記第一筒部の外壁との間に位置するアンカー部と、を有するダイアフラム部材と、
を備えるバルブ。 - 前記アンカー部は前記筒状構造体に固定され、
前記薄膜部を前記流路の側又は前記流路と反対側に張りだすように変形させることで、前記流路における流体の流れを制御する請求項14に記載のバルブ。 - 請求項1~15のいずれか一項に記載のバルブと、前記バルブが配置された流路とを備えた流体デバイス。
- 請求項1~15のいずれか一項に記載のバルブを複数備え、複数の前記バルブのうち少なくとも1つは、他のバルブと前記薄膜部の高さが異なっている、流体デバイス。
- 請求項1~15のいずれか一項に記載のバルブを備え、第一面に前記ダイアフラム部材が露出した第一基板と、
流路が形成された第二面を有する第二基板と、を備え、
前記第一面と前記第二面とを対向させて、前記流路が前記ダイアフラム部材の直上を横断するように前記第一基板と前記第二基板とを貼り合わせた流体デバイス。 - 前記第二基板は、前記ダイアフラム部材と対向する位置に設けられた、前記流路を狭くする突起部を有し、前記突起部は前記ダイアフラム部材と接触可能な接触面を有する、
請求項18に記載の流体デバイス。 - 流路に直列的に配設された複数の前記バルブを備え、前記複数のバルブの開閉により前記流路中の流体に流れを起こすポンプとして機能する、請求項18又は19に記載の流体デバイス。
- 請求項16~20のいずれか一項に記載の流体デバイスにおける流体制御方法であって、
前記アンカー部は固定されたまま変形させず、前記薄膜部を前記流路の側又は前記流路と反対側に張り出すように変形させる、流体制御方法。 - 外筒部と内筒部とを有する筒状構造体と、
前記内筒部の一端を覆うように配置された薄膜部と、前記薄膜部の周縁を一周し、前記外筒部の内壁及び前記内筒部の外壁に沿って密着したアンカー部と、を有するダイアフラム部材と、を備えたバルブを流路に配設し、
前記アンカー部は固定されたまま変形させず、前記薄膜部を前記流路の側又は前記流路と反対側に張り出すように変形させる、流体制御方法。 - 前記内筒部の内部に流体を導入することにより、前記薄膜部を変形させる、請求項21又は22に記載の流体制御方法。
- 外筒部と、内筒部と、前記外筒部及び前記内筒部の相対的な位置を固定する保持部材とを備える筒状構造体の内部に、表面張力がγであり、前記筒状構造体に対する接触角がθであり、密度がρであるポリマー組成物を注入する工程と、
前記ポリマー組成物が流動し、前記内筒部の一端を覆うように配置された、高さhを有する薄膜部と、前記薄膜部の周縁を一周し、前記外筒部の内壁及び前記内筒部の外壁に密着し、高さHを有するアンカー部とを形成し、前記筒状構造体の軸方向に対して垂直な断面C1において、前記外筒部の内壁及び前記内筒部の外壁によって囲まれる領域の面積S1、前記断面C1における前記外筒部の内壁及び前記内筒部の外壁の長さの和L1、前記断面C1において前記内筒部の内壁によって囲まれる領域の面積S2、前記断面C1における前記内筒部の内壁の長さL2、前記h及び前記Hが、下記式(1)を満たした段階で前記ポリマー組成物の流動が停止する工程と、
流動が停止した前記ポリマー組成物を硬化させる工程と、
を含む、バルブの製造方法。
(γcosθ×L1)/S1-ρg×H=(γcosθ×L2)/S2-ρg×h …(1)
[式中、gは重力加速度を示す。] - 外筒部と内筒部とを有し、前記内筒部の第一端部は前記外筒部の第一端部よりも軸方向に奥側に配置された筒状構造体の第一端部を蓋材で塞ぐ工程と、
前記筒状構造体の第二端部からダイアフラム部材の原料を注入する工程と、
前記原料を固化させることにより、前記内筒部の一端を覆うように配置された薄膜部と前記外筒部の内壁及び前記内筒部の外壁に密着したアンカー部とから成るダイアフラム部材を形成する工程と、
前記蓋材を取り外す工程と、
を含むバルブの製造方法。 - 前記ダイアフラム部材の原料は、前記内筒部の第二端部から注入する、請求項25に記載のバルブの製造方法。
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EP15818513.2A EP3168512B1 (en) | 2014-07-07 | 2015-07-07 | Fluid device and method for manufacturing valve |
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