JP2011020215A - Machining apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machining apparatus capable of automatically forcing the deformation and sucking and holding a workpiece when the plate-like workpiece is deformed. <P>SOLUTION: A conveying mechanism 12 includes a conveying plate 32, a suction-holding plate 34 which is arranged on a lower side of the conveying plate 32 to suck and hold a plate-like workpiece 2, and an elastic surrounding member 36 which surrounds the suction-holding plate 34 and is projected over the lower side of the suction-holding plate 34. When the sucked and held plate-like workpiece 2 is located on a suction-supporting plate 26 of a supporting mechanism 10, a lower end of the elastic surrounding member 36 of the conveying mechanism 12 is brought into contact with an upper side of a supporting table 24 to form a sealed space R. When a space is generated between a back side of the plate-like workpiece 2 and a surface side of the suction-holding plate 34, the negative pressure is generated in the sealed space R through suction. Thus, the conveying plate 32 is lowered by the atmospheric pressure, the elastic surrounding member 36 is contracted, and the plate-like workpiece 2 is pressed on the suction-supporting plate 26 to straighten the deformation of the plate-like workpiece 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a processing apparatus provided with a transport mechanism for sucking and holding a surface of a plate-like workpiece having deformation such as warpage, and carrying the back surface of the plate-like workpiece to a suction table. is there.

  In a processing apparatus for a plate-like workpiece such as a semiconductor package substrate, for example, a cutting apparatus that divides a semiconductor package substrate in which a large number of devices are formed into individual devices, as disclosed in Patent Document 1 below, A support mechanism and a transport mechanism are equipped. The support mechanism includes a support table and a suction support plate that is disposed on the support table and sucks and supports a plate-like workpiece. The surface area of the support table is larger than the surface area of the suction support plate, and the support table is supported by suction. It extends beyond the outer edge of the board. The transport mechanism includes a transport plate that moves up and down in the vertical direction and reciprocates in the horizontal direction, and a suction holding plate that is disposed on the lower surface of the transport plate and sucks and holds the plate-like workpiece. The plate-like workpiece is sucked and held on the suction holding plate of the transport mechanism, and the plate-like workpiece is positioned on the suction support plate of the support mechanism by appropriately moving the transport plate.

JP 2003-163180 A

  Thus, as is well known to those skilled in the art, deformations such as warpage are often generated in a plate-like workpiece such as a semiconductor package substrate. When the plate-like workpiece on which such deformation has been generated is simply conveyed directly onto the suction support plate of the support mechanism, the back surface of the plate-like workpiece and the suction support plate are caused by the deformation of the plate-like workpiece. A fine gap is formed between the surface and the surface of the plate-like workpiece, which is insufficiently supported by suction, and the plate-like workpiece is not held by the suction support plate.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that when a deformation is generated in a plate-like workpiece by improving the transport mechanism, the deformation is automatically performed. It is an object of the present invention to provide a new and improved processing apparatus capable of forcibly holding a plate-like workpiece on a suction support plate of a support mechanism.

  According to the present invention, the elastic surrounding member that surrounds the suction holding plate and protrudes beyond the lower surface of the suction holding plate is disposed on the lower surface of the transport plate in the transport mechanism, and is sucked and held by the suction holding plate of the transport mechanism. When the plate-shaped workpiece is positioned on the suction support plate of the support mechanism, the lower end of the elastic surrounding member of the transport mechanism is brought into contact with the upper surface of the support table, and the sealed space is formed by the support table, the elastic surrounding member, and the transport plate. The main technical problem is achieved by being formed.

That is, according to the present invention, as a processing apparatus for solving the main technical problem, the support table includes a support table and a suction support plate that is disposed on the support table and sucks and supports a plate-like workpiece. The surface area of the suction support plate is larger than the surface area of the suction support plate, and the support table has a support mechanism extending beyond the outer edge of the suction support plate and a transport mechanism for carrying the plate-like workpiece onto the suction support plate. In the processing equipment provided,
The transport mechanism is vertically moved and reciprocated in the horizontal direction, and the transport plate is disposed on the lower surface of the transport plate and is in contact with the entire upper surface of the plate work to suck and hold the plate work. A suction holding plate, and an elastic surrounding member disposed on the lower surface of the transport plate to surround the suction holding plate and project beyond the lower surface of the suction holding plate,
When the plate-like workpiece sucked and held by the suction holding plate of the transport mechanism is positioned on the suction support plate of the support mechanism, the lower end of the elastic surrounding member of the transport mechanism is the upper surface of the support table. A closed space is formed by the support table, the elastic surrounding member, and the transport plate, and due to deformation of the plate-like workpiece, the back surface of the plate-like workpiece and the surface of the suction holding plate Is generated through the suction support plate, a negative pressure is generated in the sealed space, whereby the transport plate and the suction holding plate are displaced downward. The processing apparatus is characterized in that the elastic surrounding member is contracted and the plate-like workpiece is pressed onto the suction support plate to correct the deformation of the plate-like workpiece.

  In the processing apparatus of the present invention, when deformation such as warpage is generated in the plate-like workpiece, the back surface of the plate-like workpiece and the suction support plate are caused by the deformation of the plate-like workpiece. A gap is formed between the surface and a negative pressure is generated in the sealed space by being sucked through the suction support substrate, whereby the plate-like workpiece is pressed onto the suction support plate, and thus the plate-like workpiece. The deformation of is automatically corrected.

The perspective view which shows suitable embodiment of the processing apparatus of this invention. The perspective view which shows the support table of the processing apparatus of FIG. The perspective view which shows the principal part of the conveyance mechanism of the processing apparatus of FIG. The fragmentary sectional view which shows the effect | action (state which attracted and hold | maintained the plate-shaped workpiece) of the conveyance mechanism of the processing apparatus of FIG. The fragmentary sectional view which shows the effect | action (state which mounted the plate-shaped workpiece on the suction support plate) of the conveyance mechanism of the processing apparatus of FIG. Sectional drawing which shows the effect | action (The state in which the elastic surrounding member was shrunk | reduced and the plate-shaped workpiece was pressed by the suction support plate) of the processing apparatus of FIG. The fragmentary sectional view which shows the effect | action (state in which the conveyance mechanism separated) of the conveyance mechanism of the processing apparatus of FIG.

  In the following, preferred embodiments of a processing apparatus constructed according to the present invention will be further described with reference to the accompanying drawings.

  FIG. 1 shows a cutting machine which is a typical example of a processing apparatus constructed according to the present invention. The illustrated cutting machine includes a housing 1, on which a cassette mounting means 4, a carry-in / out means 6, a pair of guide rails 8, a support mechanism 10 and a transport mechanism 12, a cutting means 14, and an alignment. Means 16 are provided. A supply cassette (not shown) is disposed on the cassette mounting means 4, and a plurality of plate substrates 2 are stored in the cassette at intervals in the vertical direction. .

  As shown in FIG. 2, the plate-like workpiece is a rectangular semiconductor package substrate 2 such as a QFN substrate (Quad Flat Non-leaded package) as an example. The illustrated package substrate 2 is formed of a substrate 2a, an IC chip (not shown) mounted on the back side of the substrate 2a, and a resin 2b that collectively seals the IC chip and the like. The IC chip or the like is mounted in a region defined by a dividing line S formed on the surface of the substrate 2a. By cutting along the dividing line S, the package substrate 2 is divided into individual devices D. Such a package substrate 2 is often subjected to fine deformation (several to several tens of μm) such as warpage due to the effect of resin sealing while applying high heat in the manufacturing process.

  When the description is continued with reference to FIG. 1, the package substrate 2 is carried out from the cassette onto the guide rail 8 by the carrying-in / out means 6. The package substrate 2 carried out to a predetermined position is sucked and held by the transport mechanism 12 according to the present invention and transported onto the support mechanism 10. The support mechanism 10 and the transport mechanism 12 will be described in detail later.

  The support mechanism 10 is disposed so as to be movable and rotatable in the X-axis direction in FIG. A well-known X-axis drive mechanism (not shown) formed of a ball screw, a motor, and the like is disposed below the support mechanism 10. This drive mechanism is covered with a protective member 18 such as a bellows that can expand and contract in the X-axis direction.

  The alignment means 16 is disposed so as to be movable in the Y-axis direction orthogonal to the X-axis direction. The alignment means 16 has a known microscope structure equipped with a CCD camera or the like. The surface of the package substrate 2 is imaged by the alignment means 16, and the position of the dividing line S to be cut is detected by a cutting blade 20 described later in image processing, and the cutting blade 20 is precisely positioned on the dividing line S during cutting. .

  A pair of cutting means 14 is disposed adjacent to the alignment means 16 so as to be movable in the Y-axis direction. The cutting means 14 includes a spindle (not shown) on which a cutting blade 20 is detachably mounted, and a housing 22 that houses a rotation drive source (not shown) that rotatably supports and rotates the spindle. Further, an index feed means (not shown) for indexing and feeding the cutting means 14 relative to the support mechanism 10 in the Y-axis direction, and a cutting means 14 relative to the support mechanism 10 in the Z-axis direction (vertical direction). A not-illustrated notch feeding means for notching and feeding is provided. The index feed means and the cut feed means have, for example, a ball screw and a pulse motor that rotates the ball screw, and each have a known structure that moves the cutting means 14 in a desired direction, and detailed description thereof is omitted.

  Next, the support mechanism 10 will be described with reference to FIG. The support mechanism 10 includes a support table 24 and a suction support plate 26 that is fixed to the upper surface of the support table 24 and supports the package substrate 2 by suction. The support table 24 is formed of a rigid material such as stainless steel, and the surface area thereof is larger than the surface area of the suction support plate 26 and extends beyond the outer edge of the suction support plate 26. The suction support plate 26 is formed of an elastic member such as resin, and the surface area thereof is substantially the same as the surface area of the package substrate 2. A plurality of suction holes 28 are formed in the suction support plate 26 corresponding to the device D of the package substrate 2, and a relief groove 30 for receiving the cutting blade 20 corresponding to the dividing line S is formed around the suction holes 28. Is formed. Each suction hole 28 communicates with a suction path 29 (FIG. 4) formed in the support table 24, and the suction path 29 communicates with an external vacuum suction source E.

  Next, a preferred embodiment of the transport mechanism 12 improved according to the present invention will be described with reference to FIG. FIG. 3 is a perspective view of the transport mechanism 12 as viewed from the direction of arrow A in FIG. The transport mechanism 12 includes a transport plate 32, a suction holding plate 34, an elastic surrounding member 36, and support means 38 (refer to FIGS. 1 and 4 for the support means 38). The transport plate 32 is formed in a thin plate shape using a rigid material such as stainless steel. The upper surface of the transport plate 32 is fixed to an L-shaped transport arm 40 (FIG. 1) via support means 38 including a king-shaped support plate 42.

  As shown in FIG. 4, the support means 38 includes a support plate 42, a plurality of support rods 44, and a plurality of compression springs 46. The support plate 42 is fixed to the lower end of the transport arm 40, and through holes (not shown) are formed at four prince-shaped end portions and two central portions of the support plate 42. The support rod 44 has a main portion 44a that extends downward through the through hole and an enlarged head portion 44b having a diameter larger than the diameter of the through hole, and the lower end of the main portion 44a is fixed to the upper surface of the transport plate 32. Has been. The plurality of compression springs 46 are disposed by inserting the main portion 44 a of the support rod 44. A compression spring 46 is sandwiched between the support plate 42 and the transport plate 32, and the transport plate 32 is movable upward with respect to the support plate 42. At the other end of the transfer arm 40, a driving means (not shown) that moves the transfer arm 40 up and down in the vertical direction and rotates in the horizontal direction is arranged.

  The suction holding plate 34 is formed in a rectangular shape by an elastic member such as resin or rubber, and is fixed to the center of the lower surface of the transport plate 32. The shape of the suction holding plate 34 is the same as that of the package substrate 2, and contacts the entire upper surface of the package substrate 2 when the package substrate 2 is transported. A plurality of suction holes 48 are formed in the suction holding plate 34 and communicate with a suction path 39 (FIG. 4) formed in the transport plate 32. The suction path 39 communicates with the vacuum suction source E. The elastic surrounding member 36 is formed of an elastic member such as light resin or rubber, is fixed to the lower surface of the transport plate 32, surrounds the suction holding plate 34, and protrudes beyond the lower surface of the suction holding plate 34. The amount of protrusion is equal to the total thickness of the package substrate 2 and the suction support plate 26 of the support mechanism 10.

  The operation of the processing apparatus configured as described above will be described. When the description is continued with reference to FIG. 1, the package substrate 2 accommodated in the cassette placed on the cassette placing means 4 is carried out to a predetermined position on the guide rail 8 by the carry-in / out means 6. . A transport mechanism 12 is positioned at a predetermined position on the guide rail 8. When the package substrate 2 is carried out to a predetermined position, the transport plate 32 is lowered by the driving means, the suction holding plate 34 comes into contact with the upper surface of the package substrate 2, and the suction hole 48 of the suction holding plate 34 communicates with the vacuum suction source E. Then, the package substrate 2 is sucked and held by the suction holding plate 34. Then, the transport mechanism 12 is raised by the driving means, and is rotated approximately 180 ° from above a predetermined position on the guide rail 8, and the package substrate 2 sucked and held by the transport mechanism 12 is placed on the suction support plate 26 of the support mechanism 10. Positioned (FIG. 4).

  The transport mechanism 12 is lowered by the driving means, and the lower surface of the resin 2b of the package substrate 2 is brought into contact with the suction support plate 26 of the support mechanism 10 as shown in FIG. At this time, the support rod 44 slides somewhat upward with respect to the support plate 42 and the compression spring 46 is contracted. As a result, the package substrate 2 sucked and held by the suction holding plate 34 can flexibly follow the suction support plate 26 of the support mechanism 10 and press the package substrate 2 against the suction support plate 26 with an appropriate load. At the same time, the lower end of the elastic surrounding member 36 of the transport mechanism 12 comes into contact with the upper surface of the support table 24, and a sealed space R is formed by the support table 24, the elastic surrounding member 36 and the transport plate 32.

  Next, when the suction support plate 26 of the support mechanism 10 communicates with the vacuum suction source E, due to the deformation of the package substrate 2, there are several to several hundred μm between the back surface of the package substrate 2 and the surface of the suction holding plate 26. When the gap is generated, a negative pressure is generated in the sealed space R by being sucked through the suction support plate 26 (FIG. 5). When a negative pressure is generated in the sealed space R, a downward force is applied to the transport plate 32 from above by the atmospheric pressure acting on the transport plate 32, and the support rod 44 slides downward as shown in FIG. Then, the transport plate 32 is lowered and the elastic surrounding member 36 is contracted. As a result, the package substrate 2 is pressed onto the suction support plate 26, the deformation of the package substrate 2 is corrected, and the package substrate 2 is sucked and held on the suction support plate 26 of the support mechanism 10 (FIG. 6). Thereafter, the suction holding plate 34 of the transport mechanism 12 is cut off from the vacuum suction source E and released to the atmosphere, and then the transport mechanism 12 is raised by the driving means (FIG. 7).

  The package substrate 2 sucked and held by the support mechanism 10 in this way is then detected by the alignment means 16 and the cutting means 18 performs cutting along the division line S.

2 Package substrate (plate-like workpiece)
DESCRIPTION OF SYMBOLS 10 Support mechanism 12 Conveyance mechanism 14 Cutting means 24 Support table 26 Suction support plate 32 Conveyance plate 34 Suction holding plate 36 Elastic surrounding member S Dividing line R Sealed space

Claims (1)

A support table, and a suction support plate disposed on the support table for sucking and supporting a plate-like workpiece; the support table extending beyond an outer edge of the suction support plate; and the suction support In a processing apparatus comprising a transport mechanism for carrying a plate-like workpiece onto a plate,
The transport mechanism is vertically moved and reciprocated in the horizontal direction, and the transport plate is disposed on the lower surface of the transport plate and is in contact with the entire upper surface of the plate work to suck and hold the plate work. A suction holding plate, and an elastic surrounding member disposed on the lower surface of the transport plate to surround the suction holding plate and project beyond the lower surface of the suction holding plate,
When the plate-like workpiece sucked and held by the suction holding plate of the transport mechanism is positioned on the suction support plate of the support mechanism, the lower end of the elastic surrounding member of the transport mechanism is the upper surface of the support table. A closed space is formed by the support table, the elastic surrounding member, and the transport plate, and due to deformation of the plate-like workpiece, the back surface of the plate-like workpiece and the surface of the suction holding plate Is generated through the suction support plate, a negative pressure is generated in the sealed space, whereby the transport plate and the suction holding plate are displaced downward. The elastic surrounding member is contracted, the plate-like workpiece is pressed onto the suction support plate, the deformation of the plate-like workpiece is corrected, and is sucked and held on the suction support plate. Processing equipment.

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