JP2009132529A - Sheet pasting device and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet pasting device which avoids elongation of a rolled web by reducing an adhesive force of the rolled web, and can cut an adhesive sheet by contacting the rolled web to a platen roller when a die cutting roller forms a cut. <P>SOLUTION: The sheet pasting device 10 comprises the die cutting roller 13 for forming the sheet S1 for pasting by forming a closed loop-like cut C on the adhesive sheet when the rolled web R where a band shaped adhesive sheet S is temporarily attached to the one side surface of a band-like release sheet RL is delivered, an anvil roller 15 oppositely to the die cutting roller, and a pasting means 18 for pasting the sheet for pasting to a semiconductor wafer W. A clamping means 16 for holding the rolled web is provided in parallel on the anvil roller. In the clamping means 16, a clamping roller 32 holds the rolled web with the anvil roller to firmly attach the rolled web when forming the cut, and is disposed in a predetermined amount to reduce an adhesive force when the cut is not formed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sheet sticking apparatus and a sticking method. More specifically, the sticking sheet is formed by providing a closed loop-like cut in a belt-like adhesive sheet temporarily attached to a belt-like release sheet. The present invention relates to a sheet sticking apparatus and a sticking method for sticking to a predetermined adherend.

2. Description of the Related Art Conventionally, an adhesive sheet made of a protective sheet or the like has been attached to a semiconductor wafer (hereinafter simply referred to as “wafer”). Processing is to be performed.
As a known sheet sticking device, for example, as described in Patent Document 1, a feeding means for feeding a belt-like raw material in which an adhesive sheet is temporarily attached to a release sheet, and an adhesive sheet is cut and stuck in a closed loop shape. There is known a configuration comprising a die-cutting roller that forms a sheet for use, an anvil roller that rotates following the rotation of the die-cutting roller, and an attaching means that peels the attaching sheet from the release sheet and attaches it to the disk substrate. Yes.

JP 2005-293690 A

  In the sheet sticking device described in Patent Document 1, guide rollers are arranged on the upstream side and the downstream side in the feed direction of the original fabric with respect to the die-cut roller, and the guide roller has a predetermined length on the outer peripheral surface of the anvil roller. It is the structure which forms the notched state and forms a notch in the original fabric. Here, although not specifically disclosed in Patent Document 1, generally, the die-cut roller and the anvil roller are rotated at the same speed through a gear. For this reason, by passing the original fabric along the anvil roller, it becomes difficult to produce a difference between the feeding speed of the original fabric and the rotational speed of the die-cut roller, and the original fabric is not stretched or contracted. Accurate cutting along the shape can be performed.

However, when the closed-loop cutter blades are formed on the outer periphery of the die cut roller at equal intervals along the circumferential direction, a large interval may be formed between the cutter blades. Is a wasteful consumption (see FIG. 4A).
In this case, the distance between the cutter blades can be reduced if the diameter of the die cut roller is made small, but a large readjustment of the die cut device and a great review of the control relationship are required.

Therefore, when a region where the cutter blade of the die cut roller does not exist rotates to the original fabric side, the feeding of the original fabric is stopped until the region passes and the die cut roller and the anvil roller can be idled. .
However, as described above, since the anvil roller is normally configured to rotate synchronously with the die-cut roller via the gear mechanism, it is not possible to stop only the anvil roller. Therefore, there is an inconvenience that the original fabric is pulled along the feeding direction or rubbed and damaged. Further, the extension of the original fabric becomes a factor that hinders the shape stability of the sticking sheet surrounded by the cut after the cut is formed by the die cut roller.

  Such inconvenience can be solved if the anvil roller is driven separately from the die-cut roller, but a separate driving motor is required. In addition, when using a drive source for a die-cut roller, an electromagnetic clutch or the like is necessary, which increases the size of the apparatus, complicates control, and requires time for adjusting synchronous rotation.

[Object of invention]
The present invention has been devised by paying attention to such inconveniences, and the purpose of the present invention is to perform accurate cutting by feeding the original fabric in accordance with the peripheral speed of the die cut roller, while there is a cutter blade. Providing a sheet sticking device and sticking method that can suppress the amount of raw material consumed and stop the factors that cause stretch or damage to the raw material by stopping the raw material until the area where it does not pass and performing idling control There is to do.

  In order to achieve the above object, the present invention provides a supporting means for supporting the original fabric in which the belt-like adhesive sheet is temporarily attached to one surface of the belt-like release sheet so that the original fabric can be drawn out, and gives a feed force to the original fabric. Peeling the peeling sheet, a die cut roller that forms a sticking sheet by providing a closed-loop cut in the adhesive sheet in the course of feeding the original fabric, an anvil roller disposed opposite to the die cutting roller, and the sticking sheet In a sheet sticking apparatus provided with a sticking means for peeling off from a sheet and sticking to an adherend, a raw material is provided between the die cutting roller and the anvil roller on the upstream side and / or downstream side in the feed direction of the raw material. The clamping means further includes a clamping means, and the clamping means adheres the original fabric for a predetermined length along the circumferential direction of the anvil roller, and against the original fabric. While Ikat roller passes by a region not forming a notch above, it adopts a structure that, to idle the die cut roller and the anvil roller is displaced in a direction to reduce the sandwiching force.

  The sheet sticking apparatus according to the present invention further includes a tension adjusting unit, and the tension adjusting unit is configured to adjust a change in tension of the original fabric based on the displacement of the clamp unit.

Further, the present invention forms a sticking sheet by providing a closed-loop cut in the adhesive sheet when feeding out the original fabric in which the belt-like adhesive sheet is temporarily attached to one surface of the belt-like release sheet, In the sheet sticking method of peeling the sticking sheet from the release sheet and sticking it to the adherend,
The incision is formed by passing an original fabric between a die-cut roller and an anvil roller, and clamping means is provided so that the original fabric is in close contact with the outer peripheral surface of the anvil roller at a predetermined length when the incision is formed. Using the method of sandwiching the original fabric and displacing the position of the clamp means to reduce the force to sandwich the original fabric when the cut is not formed, and causing the die cut roller and the anvil roller to idle Yes.

According to the present invention, by feeding the original fabric along the anvil roller, the original fabric can be stably fed in accordance with the peripheral speed of the die-cut roller, so that an accurate cutting cut can be formed.
In addition, while the die cut roller passes through the area where no cut is formed, the clamping means is displaced to reduce the force to pinch the original fabric, and the die cut roller and the anvil roller are idled so that the original fabric is pulled by the rotation of the anvil roller. It is possible to eliminate inconveniences such as being rubbed and scratched.
Furthermore, the structure provided with the tension adjusting means can effectively avoid the change in the tension of the original fabric even when the length of the original feed path changes due to the displacement of the clamping means.
In the present specification, the term “closed loop” is sufficient if it is endless, and includes “oval”, “polygon”, and the like in addition to the case where it is closed in a circular shape.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic front view of a sheet sticking apparatus according to the present embodiment, and FIG. 2 shows a cross-sectional view of an original fabric applied to the sheet sticking apparatus. In these drawings, the sheet sticking device 10 feeds out a raw fabric R (see FIG. 2 (A)) in which a belt-like adhesive sheet S having an adhesive layer A is temporarily attached to one surface of a belt-like release sheet RL. Supporting means 11 for supporting, feeding means 12 for applying a feeding force to the original fabric R, and a closed-loop cut C (see FIG. 2 (B) reaching the release sheet RL from the adhesive sheet S side while feeding the original fabric R. )) To form the sticking sheet S1, an anvil roller 15 disposed opposite to the die cut roller 13, and an anvil roller 15 upstream of the die cut roller 13 in the feed direction of the original R. A clamping means 16 for sandwiching the original fabric R between the clamping means 16 and a tension adjusting means 17 provided between the clamping means 16 and the supporting means 11; Peeled from RL is configured to include a sticking means 18 for sticking the wafer W as an adherend.

  The support means 11 is composed of a support roller 21 that supports the roll R wound raw material R so that the roll can be fed out. The support roller 21 is connected to the output shaft of the motor M1 to give a certain feeding resistance. It is provided so that it can rotate in the state which was made.

  The feeding means 12 includes a driving roller 22 that is rotated by driving of the motor M2 and a pinch roller 24 that sandwiches the original fabric R between the driving roller 22 and is supported by driving the driving means 12. A repetitive output is applied to the original fabric R supported by the roller 21.

  The die cut roller 13 includes a roller main body 26 that rotates by driving of the motor M3, and a cutter blade 27 provided on the outer periphery of the roller main body 26. The cutter blade 27 has a shape that is continuous in a closed loop shape on the outer periphery of the roller body 26, and has a shape that corresponds to the outer shape of the wafer W when the roller body 26 is viewed on a flat surface. The die cut roller 13 has a region 27 </ b> A where the cutter blade 27 does not exist in the circumferential direction of the roller body 26. Further, the die cut roller 13 and the anvil roller 15 are provided so as to be interlocked via a gear mechanism (not shown), whereby the anvil roller 15 can rotate following the rotation of the die cut roller 13.

  The clamping means 16 includes a linear motion motor M4 positioned above the anvil roller 15, and a clamp roller 32 supported on the tip side of the linear motion motor M4 via a bracket 30. The clamp roller 32 is configured to sandwich the original fabric R with the anvil roller 15 on the upstream side in the feed direction of the original fabric R from the position where the cut C is formed by the die-cut roller 13. The raw fabric R is drawn out in close contact with the outer peripheral surface of the anvil roller 15 over the entire length. The clamp roller 32 can be displaced from a position where the raw fabric R is sandwiched by driving the linear motion motor M4 to a position indicated by a two-dot chain line in the figure, and is initially in a state of being displaced to the two-dot chain line position. It is possible to perform the work of wrapping the original fabric.

  The tension adjusting means 17 includes a driving roller 35 that is rotated by driving a motor M 5 capable of torque control, and a pinch roller 36 that sandwiches the raw fabric R between the driving roller 35. The tension of the raw fabric R between the drive rollers 22 and 35 is adjusted to a predetermined value. The motor M2 can also be a motor capable of adjusting the torque. In this case, the tension of the raw fabric R may be adjusted by linking with the motor M5.

  The affixing means 18 guides the original fabric R in the direction of turning back, peels off the affixing sheet S1 from the exfoliation sheet RL, a table 41 for supporting the wafer W, and an affixing sheet to the wafer W. The press roller 42 that presses S1, the moving means 43 that moves the table 41 in the left-right direction in FIG. 1, and the original fabric R portion after the pasting sheet S1 has been peeled off while giving the feed force to the original fabric R And winding means 44 that winds up as an unnecessary sheet S2. The table 41 is supported by a base table 46 that can move along a guide rail 45 that constitutes the moving means 43 so that the table 41 can move up and down, and the upper surface side is formed as a suction holding surface for the wafer W. The winding means 44 includes a driving roller 48 that is rotated by driving the motor M6, a pinch roller 49 that sandwiches the unnecessary sheet S2 between the driving roller 48, and a winding roller 50 that winds the unnecessary sheet S2. It is configured. The winding roller 50 is rotatably provided via transmission means such as a pulley and a belt (not shown) provided between the winding roller 50 and the motor M6. In the present embodiment, the buffer means 19 is provided with a plurality of guide rollers 53 and dancer rollers 52 between the feeding means 12 and the sticking means 18.

  Next, the overall operation of the sheet sticking apparatus 10 in the present embodiment will be described.

  As an initial operation, the raw roll R is pulled out from the support roller 21, and the clamp roller 32 of the clamp means 16 is displaced to the forward movement position (the two-dot chain line position in FIG. 1), and between the die cut roller 13 and the anvil roller 15. The sheet is passed, and the lead end of the original fabric R is fixed to the winding roller 50 via the feeding means 12, the buffer means 19, and the peel plate 40.

  When a predetermined operation start signal is given through a control device (not shown), the clamp roller 32 is displaced by the linear motion motor M4 to a position (solid line position in FIG. 1) where the raw fabric R is sandwiched between the anvil roller 15, Thereby, the raw fabric R is kept in contact with the outer peripheral surface of the anvil roller 15 over a predetermined length so as to be in close contact therewith.

Next, the motors M1 to M6 other than the linear motion motor M4 are linked and driven, and the die cut roller 16 and the anvil roller 15 rotate to form a cut C in the original fabric R.
In the present embodiment, one cutter blade 27 is provided in the circumferential direction of the roller body 26. Here, since the region 27A where the cutter blade 27 does not exist is formed over a wide area because of the relationship with the diameter of the die cut roller 13, the interval D of the cuts C can be formed widely as shown in FIG.
Therefore, while the region 27A where the cutter blade 27 does not exist passes through the anvil roller 15 side, that is, while the cut C is not formed in the original fabric R, the clamp roller 32 sandwiches the original fabric R with respect to the anvil roller 15. 1 is moved slightly to the left in FIG. 1 to release the jam of the original fabric R, and the motors M5 and M2 stop feeding the original fabric.
In this state, when the die cut roller 13 and the anvil roller 15 rotate, the rollers 13 and 15 idle with respect to the original fabric R. Then, when the cutter blade 27 again enters the anvil roller 15 side, the clamp roller 32 is displaced to a position where the original fabric R is sandwiched between the anvil roller 15 and the motors M5 and M2 resume the supply of the original fabric. As a result, as shown in FIG. 4B, the cutting interval D can be narrowed and the consumption of the raw fabric R can be suppressed. Furthermore, since the clamping of the original fabric R by the clamp roller 32 is released, the original fabric R is not pulled or damaged by the anvil roller 15.

  When the sticking sheet S1 formed at the leading edge of the original fabric R by the notch C is fed out to the front end side of the peel plate 40 and detected by a sensor (not shown), the feeding of the original fabric R is stopped and is in a standby state. It becomes.

  When a sensor (not shown) detects that the wafer W is placed on the table 41, the table 41 moves to a position indicated by a solid line in FIG. 1 and rises, and the lower part of the peel plate 40 is left in FIG. Move in the direction. In synchronization with this movement, the drive motor M6 of the winding means 44 is driven to peel off the sticking sheet S, and the sticking sheet S1 is stuck to the wafer W while receiving the pressing force by the press roller 42. (See FIG. 3). Note that, as described above, the sticking sheet S1 is stuck in a size corresponding to the shape of the wafer W because the notch C is formed while maintaining a constant tension during unwinding of the original fabric. .

Therefore, according to such an embodiment, a predetermined length of the original fabric R is brought into close contact with the outer peripheral surface of the anvil roller 15 to form the cut C in the adhesive sheet S, while the original fabric R is not formed when the cut C is not formed. Since the degree of contact is weakened via the clamping means 16 so as to reduce the contact resistance between R and the anvil roller 15, the cutter blade 27 of the die cut roller 13 is in a non-cutting position that is not located on the anvil roller 15 side. Even when the anvil roller 15 is rotating, the original fabric R is not stretched, and the cut C can always be formed with a constant tension. A cutting notch can be formed.
Further, by providing the tension adjusting means 16, it is possible to correct the tension change due to the displacement of the clamp roller 32 without difficulty.

The best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this.
That is, the invention has been illustrated and described with particular reference to particular embodiments, but it should be understood that the above-described embodiments are not deviated from the technical idea and scope of the invention. On the other hand, those skilled in the art can make various modifications in shape, material, quantity, and other detailed configurations.
Accordingly, the description limited to the shape disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which excluded the limitation of all or part is included in this invention.

  For example, in the above-described embodiment, the configuration in which the clamping unit is disposed on the upstream side in the feed direction of the original fabric with respect to the die cut roller has been illustrated and described, but the present invention is not limited to this, and the feed of the original fabric is performed. The clamp means may be provided on the upstream side and the downstream side in the direction, or the clamp means may be provided only on the downstream side in the feed direction of the original fabric.

  The adhesive sheet S may be a protective sheet for protecting the circuit surface of the wafer W or a mount sheet for integrating the wafer with the ring frame.

  Further, the tension adjusting means 17 can be omitted if necessary. In this case, the motor M2 that drives the drive roller 22 can be dealt with by using a motor capable of torque control.

  Further, the adherend is not limited to the wafer W, and other plate-like members such as a glass plate, a steel plate, or a resin plate can also be targeted. The semiconductor wafer is a silicon wafer or a compound wafer. There may be.

The schematic front view of the sheet sticking apparatus in this embodiment. (A) is sectional drawing of the original fabric applied to the said sheet sticking apparatus, (B) is sectional drawing of the original fabric which shows the state which formed the notch | incision. Explanatory drawing which shows the state which affixes the sheet | seat for sticking on a wafer. (A) is a perspective view showing a state in which the original fabric is unnecessarily consumed by a region where no cut is formed, and (B) shows a state in which a die-cut roller and an anvil roller are idled to minimize a portion that is wasted. Perspective view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sheet sticking apparatus 11 Support means 12 Feeding means 13 Die cut roller 15 Anvil roller 16 Clamp means 17 Tension adjusting means 18 Sticking means C Cutting S Adhesive sheet S1 Sheet for sticking R Original fabric RL Release sheet W Semiconductor wafer (adhered body)

Claims (3)

In the middle of feeding the original fabric, support means for supporting the original fabric with the belt-shaped adhesive sheet temporarily attached to one surface of the strip-shaped release sheet, a feeding device for giving a feed force to the original fabric, and A die-cut roller that forms a sticking sheet by providing a closed-loop cut in the adhesive sheet, an anvil roller disposed opposite to the die-cut roller, and the sticking sheet is peeled off from the release sheet and attached to the adherend. In a sheet sticking device provided with sticking means,
It further includes clamping means for sandwiching the original fabric with the anvil roller on the upstream side and / or downstream side of the die cutting direction with respect to the die cut roller, and the clamping means is arranged along the circumferential direction of the anvil roller. The die cut roller and the anvil roller are idled by being displaced in a direction to reduce the sandwiching force while the die cut roller is in close contact with the predetermined length and the die cut roller passes through the region where the cut is not formed with respect to the original fabric. A sheet sticking device characterized by the above.   2. The sheet sticking apparatus according to claim 1, further comprising tension adjusting means, wherein the tension adjusting means adjusts the tension change of the original fabric based on the displacement of the clamping means. When feeding out the raw material with the belt-like adhesive sheet temporarily attached to one surface of the belt-like release sheet, the adhesive sheet is formed by forming a closed-loop cut in the adhesive sheet, and the adhesive sheet is peeled off. In the sheet sticking method of peeling from the sheet and sticking to the adherend,
The incision is formed by passing an original fabric between a die-cut roller and an anvil roller, and clamping means is provided so that the original fabric is in close contact with the outer peripheral surface of the anvil roller at a predetermined length when the incision is formed. The sheet is sandwiched using the sheet, and when the cut is not formed, the position of the clamping means is displaced to reduce the force to sandwich the sheet, and the die-cut roller and the anvil roller are idled. Pasting method.

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