JP2014091207A - Cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting device which can suppress duration required for working.SOLUTION: A cutting device comprises: a chuck table; cutting means for cutting a workpiece held on the chuck table, X-axis transfer means for transferring the chuck table in an X-axis direction, and an air knife nozzle 60 having a slit jet port 68 which jets compression air to the workpiece held on the chuck table to remove a cutting liquid. The air knife nozzle 60 is equipped with: a tubular body part 61 which has a long hole 65 in one side face 61a on a longitudinal side, the long hole 65 having a length exceeding the width of the workpiece; a cover plate 62 having an opposite face 62a which is provided so as to face the one side face 61a and cover the long hole 65; and a slit formation plate 63 sandwiched between the tubular body part 61 and the cover plate 62. The slit formation plate 63 forms a clearance between the one side face 61a and the opposite face 62a thereby forming the slit jet port 68.

Description

  The present invention relates to a cutting apparatus.

  In a cutting apparatus, a so-called dicing saw, a plate-like workpiece such as silicon, an optical device, glass, ceramics, or resin is cut while supplying a cutting fluid to a cutting blade that rotates at high speed. The cutting fluid contains a large amount of cutting waste and must be prevented from adhering to the workpiece. For this reason, after the processing of the workpiece is completed, the cutting fluid is generally removed with an air curtain, and then the upper surface is usually cleaned with a cleaning means (see, for example, Patent Document 1).

JP 05-090403 A

  However, there are products that do not require cleaning of the cutting fluid on the workpiece. In that case, since the drying process normally performed after washing | cleaning in a washing | cleaning process is omitted, there exists a request | requirement of wanting to shorten a process by drying immediately after completion | finish of a process. An air curtain that has been widely used in a cutting apparatus so far removes the cutting fluid by applying compressed air or the like ejected spotwise from an opening opened alongside a tubular nozzle to a workpiece. However, since the removal force of the air curtain is weak, it has been observed that the time required for processing is prolonged by reciprocating the workpiece under the air curtain many times.

  This invention is made in view of the above, Comprising: It is providing the cutting device which can remove cutting fluid, without reciprocating a workpiece many times, and can suppress the time required for a process. Objective.

  In order to solve the above-described problems and achieve the object, a cutting apparatus of the present invention includes a chuck table for holding a workpiece, and cutting while supplying a cutting fluid to the workpiece held on the chuck table. In a cutting apparatus comprising a processing means for cutting in an area and a cutting feed means for cutting and feeding the chuck table in a cutting direction, the chuck table held by the chuck table carried out from the cutting area by the cutting feed means An air knife nozzle having a slit-like outlet for ejecting compressed air to the workpiece and removing the cutting fluid on the upper surface of the workpiece is disposed in a direction intersecting the cutting direction, and the air The knife nozzle is supplied with compressed air from a supply port, and has a tubular main body portion having a long hole having a length exceeding the width of the workpiece on one side surface of the longitudinal side, and the one of the tubular main body portions. A cover plate disposed opposite to the surface and having a facing surface that covers the elongated hole, and sandwiched between the tubular body portion and the cover plate, and one side surface of the tubular body portion and the facing surface of the cover plate A plate-like slit forming plate that forms a slit-like jet port by forming a gap in the slit, and the slit forming plate opens one side of the tubular main body portion and the cover plate. The slit-shaped ejection port is sealed except for the slit-shaped ejection port, and the thickness of the slit-forming plate is the width of the slit-shaped ejection port.

  Therefore, in the cutting device of the present invention, the slit forming plate disposed between one side surface of the tubular main body portion and the facing surface of the cover plate forms a slit-like jet port therebetween. For this reason, the width of the slit-shaped spout is equal to the thickness of the slit-forming plate, the length of the slit-shaped spout is equal to the length of the slit-forming plate, the width of the slit-shaped spout is narrow, and the width of the workpiece is reduced. It will be over the length. Accordingly, the cutting device can reduce the opening area of the slit-shaped ejection port as much as possible, but can make the length beyond the width of the workpiece, so that the width of the workpiece is smaller than the spot-like opening. Compressed air can be ejected from the slit-shaped ejection port onto the workpiece at a uniform and fast flow rate over the entire length. Therefore, the cutting device uniformly jets compressed air at a high flow rate that exceeds the width of the work piece to the work piece, so that the cutting fluid in the work piece is removed below the air knife nozzle. There is no need to reciprocate the workpiece many times. Therefore, in the cutting device, the cutting fluid can be removed without reciprocating the workpiece many times, and the time required for removing the cutting fluid from the workpiece can be suppressed.

  Moreover, although the flow volume and flow velocity of the compressed air to be ejected are determined by the width of the slit-shaped ejection port, it is usually difficult to form a long thin slit in the tube body. However, in the cutting apparatus according to the present invention, the slit-shaped ejection port is configured by the slit-forming plate, so that a long and narrow slit-shaped ejection port can be easily formed, and the width of the slit-shaped ejection port can be changed. This can be done by changing the thickness. Therefore, the cutting device has an effect that the slit-like ejection port can be changed easily and inexpensively.

Drawing 1 is a perspective view of the example of composition of the cutting device concerning an embodiment. FIG. 2 is an exploded perspective view of the air knife nozzle of the cutting apparatus according to the embodiment. FIG. 3 is a side view showing cutting means, an air knife nozzle, and the like of the cutting apparatus according to the embodiment. FIG. 4 is a cross-sectional view of the air knife nozzle of the cutting apparatus according to the embodiment. FIG. 5 is a side view of the air knife nozzle of the cutting apparatus according to the embodiment.

  DESCRIPTION OF EMBODIMENTS Embodiments (embodiments) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited by the contents described in the following embodiments. The constituent elements described below include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the structures described below can be combined as appropriate. Various omissions, substitutions, or changes in the configuration can be made without departing from the scope of the present invention.

Embodiment
A cutting apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view illustrating an outline of a configuration example of a cutting apparatus according to an embodiment. FIG. 2 is an exploded perspective view schematically illustrating an air knife nozzle of the cutting apparatus according to the embodiment. FIG. 3 is a side view showing cutting means, an air knife nozzle, and the like of the cutting apparatus according to the embodiment. FIG. 4 is a cross-sectional view of the air knife nozzle of the cutting apparatus according to the embodiment. FIG. 5 is a side view of the air knife nozzle of the cutting apparatus according to the embodiment.

  The cutting apparatus 1 according to the present embodiment includes at least a cutting means 20 (corresponding to a processing means) having a cutting blade 21 and a chuck table 10 holding a workpiece W (shown in FIG. 2). The workpiece W is cut by moving the workpiece. As shown in FIG. 1, the cutting apparatus 1 includes a cassette elevator 30 that accommodates a workpiece W before and after cutting, a temporary placement means 40 that temporarily places the workpiece W before and after cutting, The chuck table 10, the cutting means 20, the X-axis moving means 50 (corresponding to the cutting feed means) for cutting and feeding the chuck table 10 in the X-axis direction (corresponding to the cutting direction), the air knife nozzle 60, and the control means (Not shown). Further, the cutting apparatus 1 relatively moves the chuck table 10 and the cutting means 20 in the Z-axis direction, and a Y-axis moving means (not shown) that relatively moves the chuck table 10 and the cutting means 20 in the Y-axis direction. Z-axis moving means (not shown) is provided.

  Here, the workpiece W is a plate-like workpiece to be machined by the cutting apparatus 1. In this embodiment, the workpiece W is a disc-shaped semiconductor wafer having a plurality of devices defined by division lines that are orthogonal to each other. And optical device wafers. The workpiece W is divided into individual devices by causing the cutting apparatus 1 to relatively move the chuck table 10 and the cutting means 20 having the cutting blade 21 to perform cutting on the division line. In the present embodiment, as shown in FIG. 1, the workpiece W has a dicing tape T attached to the back surface opposite to the surface WS on which the device is formed, and an annular frame F attached to the dicing tape T. Is attached to the annular frame F via the dicing tape T. In the present invention, the workpiece W may be a resin package substrate, a glass plate, or a polycrystalline silicon substrate having a plurality of devices partitioned by the division lines.

  The cassette elevator 30 accommodates a plurality of workpieces W, and is provided in the apparatus main body 2 of the cutting apparatus 1 so as to be movable up and down in the Z-axis direction. The temporary placement means 40 takes out one workpiece W before cutting from the cassette elevator 30 and accommodates the workpiece W after cutting in the cassette elevator 30. The temporary placing means 40 includes a carry-in / out means 41 for taking the workpiece W into and out of the cassette elevator 30 and a pair of rails 42 for temporarily placing the workpiece W thereon.

  In the chuck table 10, the workpiece W before cutting on the rail 42 of the temporary placement means 40 is conveyed by the conveying means 81 and is adhered to the opening of the annular frame F via the dicing tape T. The object W is held. The chuck table 10 has a disk shape in which a portion constituting the surface is made of porous ceramic or the like, is connected to a vacuum suction source (not shown) via a vacuum suction path (not shown), and is a workpiece W placed on the surface. Hold by sucking. The chuck table 10 is provided so as to be movable in the X-axis direction by the X-axis moving means 50, and is provided so as to be rotatable around a central axis (parallel to the Z-axis) by a rotation drive source (not shown). Yes.

  The cutting means 20 performs cutting in the cutting region PR while supplying the cutting fluid L (shown in FIG. 3) to the workpiece W held on the chuck table 10. The cutting means 20 is provided so as to be movable in the Y-axis direction by the Y-axis moving means with respect to the workpiece W held on the chuck table 10 and movably provided in the Z-axis direction by the Z-axis moving means. It has been. As shown in FIG. 3, the cutting means 20 is an extremely thin cutting grindstone having a substantially ring shape and is rotated by a spindle (not shown) to cut the workpiece W by cutting blade 21, A cutting nozzle 22 that supplies the cutting fluid L to the workpiece W held on the chuck table 10 is included.

  The X-axis moving means 50 cuts and feeds the chuck table 10 in the X-axis direction between the cutting area PR below the cutting means 20 and the carry-in / out area TR near the cassette elevator 30. The X-axis moving means 50 includes an X-axis ball screw 51 parallel to the X-axis, an X-axis pulse motor (not shown) that rotates the X-axis ball screw 51 around the axis, and an X-axis guide rail (not shown) parallel to the X-axis. It is comprised including. The X-axis ball screw 51 is screwed into a lower portion of a table moving base (not shown) to which the chuck table 10 is attached. The X-axis guide rail slidably supports the table moving base. The X-axis moving means 50 rotates the X-axis ball screw 51 by the rotational force generated by the X-axis pulse motor, thereby guiding the chuck table 10 to the X-axis while guiding the table moving base by the pair of X-axis guide rails. Can be moved in the direction.

  The air knife nozzle 60 injects compressed air onto the workpiece W held on the chuck table 10 that is carried out from the cutting region PR to the carry-in / out region TR by the X-axis moving means 50, and is applied to the upper surface of the workpiece W. It has a slit-like ejection port 68 (shown in FIG. 4) for removing the mounted cutting fluid L. The air knife nozzle 60 is disposed between the cutting region PR and the carry-in / out region TR, and is disposed in the Y-axis direction that intersects (is orthogonal to the embodiment) the X-axis direction.

  As shown in FIGS. 2 and 4, the air knife nozzle 60 includes a long tubular main body 61 that is parallel to the Y-axis direction, a cover plate 62, and a slit forming plate 63. The tubular main body 61 is formed in a cylindrical shape whose both ends are closed, and compressed air from a compressed air supply source (not shown) is supplied from a supply port 64 provided at one end on the near side in FIG. Further, the tubular main body 61 has an elongated hole 65 having a length exceeding the width in the Y-axis direction of the workpiece W on one side surface 61a of the longitudinal side. The elongated hole 65 penetrates the side surface 61 a over substantially the entire length of the tubular main body portion 61 and communicates the inside and outside of the tubular main body portion 61.

  The cover plate 62 is formed in a flat plate shape that is substantially the same size as the one side surface 61 a of the tubular main body 61. The cover plate 62 is disposed to face one side surface 61 a of the tubular main body 61 and has a facing surface 62 a that covers the elongated hole 65. The cover plate 62 is attached to the tubular main body 61 with a screw 66 or the like such that the opposing surface 62a is overlapped with the one side surface 61a of the tubular main body 61 with a gap.

  The slit forming plate 63 is formed in a flat plate shape having substantially the same length as the one side surface 61 a of the tubular main body 61. The slit forming plate 63 is disposed between the tubular main body 61 and the cover plate 62. When the cover plate 62 is attached to the tubular main body 61 with screws 66, the slit forming plate 63 is sandwiched between the tubular main body 61 and the cover plate 62. Is done. The slit forming plate 63 is provided with a notch 67 cut out from the lower outer edge in FIG. 2 to the approximate center in the width direction over its entire length. The notch 67 communicates with the elongated hole 65 when the slit forming plate 63 is sandwiched between the tubular main body 61 and the cover plate 62. Since the slit forming plate 63 has the notch 67, a slit is formed between the one side surface 61 a of the tubular main body 61 and the facing surface 62 a of the cover plate 62, thereby forming a slit-like jet port 68. In other words, the gap formed by the slit forming plate 63 between the one side surface 61 a of the tubular main body 61 and the facing surface 62 a of the cover plate 62 forms a slit-like jet outlet 68. For this reason, the thickness of the slit forming plate 63 becomes the width of the slit-shaped ejection port 68. The slit forming plate 63 has a notch 67 that opens the elongated hole 65, and seals between the one side surface 61 a of the tubular main body 61 and the facing surface 62 a of the cover plate 62 except for the slit-like jet port 68. ing. The slit forming plate 63 includes a through hole 72 through which the screw 66 is passed.

  The air knife nozzle 60 ejects compressed air from a compressed air supply source from a slit-shaped outlet 68. Further, the air knife nozzle 60 is attached to a bracket 69 (shown in FIG. 5) provided in the apparatus main body 2 with a slit-like jet port 68 opened downward and parallel to the Y-axis direction. Two brackets 69 are erected from the apparatus main body 2 and overlapped on both end faces of the air knife nozzle 60 in the longitudinal direction. As shown in FIG. 5, the bracket 69 is provided with a bolt through hole 71 through which a bolt 70 screwed into both longitudinal end surfaces of the air knife nozzle 60 is passed. The bolt through hole 71 is formed in an arc shape centering on an axis parallel to the Y-axis direction of the air knife nozzle 60. By changing the position where the bolt 70 passes through the bolt passage hole 71, the direction of the air knife nozzle 60 around the axis parallel to the Y-axis direction can be changed. Thus, the air knife nozzle 60 can change (adjust) the jet direction of the compressed air by changing the position where the bolt 70 passes through the bolt passage hole 71.

  The control means controls the above-described components constituting the cutting apparatus 1 to cause the cutting apparatus 1 to perform a machining operation on the workpiece W. The control means is mainly composed of an arithmetic processing unit constituted by, for example, a CPU, a microprocessor (not shown) provided with a ROM, a RAM, and the like. It is connected to an operating means (not shown) used when registering content information and the like.

  Next, the machining operation of the cutting device 1 according to the embodiment will be described. When the operator registers the machining content information in the control means and receives an instruction to start the machining operation from the operator, the cutting device 1 starts the machining operation. In the processing operation, the control means unloads the workpiece W before cutting from the cassette elevator 30 to the temporary placing means 40 by the carry-in / out means 41, and places the workpiece W on the pair of rails 42 of the temporary placing means 40. It is conveyed to the chuck table 10 by the conveying means 81 and is sucked and held on the chuck table 10.

  Next, the control means moves the chuck table 10 from the carry-in / out area TR toward the cutting area PR by the X-axis moving means 50, performs alignment based on the information of the image captured by the imaging means, and then performs processing. Based on the contents information, the workpiece W is cut along the scheduled division line while supplying the cutting fluid L, and the workpiece W is divided. When all of the division lines are cut, the control unit moves the chuck table 10 from the cutting region PR toward the loading / unloading region TR by the X-axis moving unit 50, and the compressed air from the compressed air supply source. Is supplied to the air knife nozzle 60, and compressed air is ejected from the slit-like ejection port 68. At this time, the cutting fluid L is on the upper surface of the workpiece W held on the chuck table 10. Then, when the workpiece W held on the chuck table 10 passes under the air knife nozzle 60, as shown in FIG. 3, the compressed air is blown onto the upper surface of the workpiece W, and the workpiece is covered by the compressed air. The cutting fluid L is blown off from the upper surface of the workpiece W. Thus, the cutting fluid L is removed from the upper surface of the workpiece W held on the chuck table 10, and the upper surface of the workpiece W is dried.

  Then, after the suction of the chuck table 10 is stopped, the control unit places the workpiece W on the chuck table 10 in the loading / unloading region TR on the rail 42 by the transport unit 81. Then, the control means carries the workpiece W that has been subjected to the cutting work on the rail 42 into the cassette elevator 30 by the carry-in / out means 41.

  As described above, according to the cutting device 1 according to the present embodiment, the slit forming plate 63 disposed between the one side surface 61a of the tubular main body 61 and the facing surface 62a of the cover plate 62 is interposed between them. A slit-like spout 68 is formed. For this reason, the width of the slit-shaped ejection port 68 is equal to the thickness of the slit-forming plate 63, and the length of the slit-shaped ejection port 68 is substantially equal to the length of the notch 67 formed in the slit-forming plate 63. The jet outlet 68 has a narrow width that exceeds the width of the workpiece W. Thereby, since the cutting apparatus 1 can make the length beyond the width of the workpiece W while suppressing the opening area of the slit-like ejection port 68 as much as possible, the cutting device 1 extends over the entire width of the workpiece W. The compressed air can be ejected from the slit-shaped ejection port 68 to the workpiece W at a high flow rate. Therefore, since the cutting device 1 ejects compressed air having a high flow velocity that exceeds the width of the workpiece W to the workpiece W, an air knife nozzle is used to remove the cutting fluid L of the workpiece W. There is no need to reciprocate the workpiece W many times below 60. Therefore, the cutting fluid L can be removed without reciprocating the workpiece W many times, and the time required for removing the cutting fluid L from the workpiece W can be suppressed.

  Moreover, although the flow volume and flow velocity of the compressed air to be ejected are determined by the width of the slit-like ejection port 68, it is usually difficult to form a long thin slit in the tube body. However, in the cutting apparatus 1 according to the embodiment, the slit-shaped ejection port 68 is configured by the slit forming plate 63, whereby a long and narrow slit-shaped ejection port 68 can be easily formed, and the width of the slit-shaped ejection port 68 is changed. Can also be performed by changing the thickness of the slit forming plate 63. Therefore, the cutting device 1 can change the slit-shaped ejection port 68 easily and inexpensively.

  The present invention is particularly suitable for a workpiece W that is less restricted than the semiconductor wafer or the optical device wafer, for example, a ceramic or a resin package.

  The present invention is not limited to the above embodiment. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Cutting device 10 Chuck table 20 Cutting means (processing means)
50 X axis moving means (cutting feed means)
60 Air Knife Nozzle 61 Tubular Main Body 61a One Side 62 Cover Plate 62a Opposing Surface 63 Slit Forming Plate 64 Supply Port 65 Elongated Hole 68 Slit Outlet PR Cutting Area L Cutting Fluid W Workpiece

Claims (1)

A chuck table for holding a workpiece, a processing means for cutting in a cutting region while supplying a cutting fluid to the workpiece held on the chuck table, and a cutting feed for cutting and feeding the chuck table in a cutting direction A cutting device comprising:
A slit-like spout for ejecting compressed air onto the workpiece held on the chuck table carried out of the cutting area by the cutting feed means and removing the cutting fluid on the upper surface of the workpiece. An air knife nozzle having a direction that intersects the cutting direction;
The air knife nozzle is
Compressed air is supplied from the supply port, and a tubular body having a long hole with a length exceeding the width of the workpiece on one side of the longitudinal side;
A cover plate disposed opposite to the one side surface of the tubular main body and having an opposing surface that covers the elongated hole;
A plate-shaped slit forming plate that is sandwiched between the tubular main body and the cover plate, and forms a slit in the one side surface of the tubular main body and the facing surface of the cover plate to form the slit-shaped ejection port;
With
The slit forming plate opens the elongated hole and seals between one side surface of the tubular main body portion and the facing surface of the cover plate, except for the slit-like jet port,
A cutting apparatus characterized in that the thickness of the slit-forming plate is the width of the slit-shaped outlet.

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