KR20150018405A - Collet and die bonder - Google Patents

Collet and die bonder Download PDF

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Publication number
KR20150018405A
KR20150018405A KR1020140100346A KR20140100346A KR20150018405A KR 20150018405 A KR20150018405 A KR 20150018405A KR 1020140100346 A KR1020140100346 A KR 1020140100346A KR 20140100346 A KR20140100346 A KR 20140100346A KR 20150018405 A KR20150018405 A KR 20150018405A
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die
collet
intermediate stage
wafer
foot
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KR1020140100346A
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Korean (ko)
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KR101666276B1 (en
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마사끼 마쯔야마
히로시 마끼
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가부시끼가이샤 히다찌 하이테크 인스트루먼츠
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
    • H01L21/67703—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations
    • H01L21/67712—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations the substrate being handled substantially vertically

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  • Engineering & Computer Science (AREA)
  • Die Bonding (AREA)
  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Robotics (AREA)

Abstract

In the conventional collet, a die may be damaged when the die is replaced in a middle stage. In addition, a DAF may be degraded. Therefore, the present invention provides a collet and a die bonder of which the die is not damaged and the DAF is not degraded when the die is picked up from a wafer and is replaced in the middle stage. The present invention comprises: a flat adsorption surface to adsorb the upper surface of the die and a collet top end part having a foot surrounding the side surface of the adsorbed die, wherein the depth of the foot of the collet top end part is thicker than the thickness of the die.

Description

COLLET AND DIE BONDER {COLLET AND DIE BONDER}

The present invention relates to a die bonder, and more particularly to a collet for picking up a die from a wafer and placing it on an intermediate stage.

A step of dividing a die from a semiconductor wafer (hereinafter simply referred to as a wafer) as a part of a step of mounting a die (semiconductor chip) (hereinafter, simply referred to as a die) on a substrate such as a wiring board or a lead frame, , And a bonding step of laminating the divided die on a substrate mounted on a substrate or a die already bonded.

As a method of performing the bonding process, there is a method of mounting a die picked up from a wafer onto an intermediate stage (alignment stage) once, picking up the die again from the component placement table with a bonding head, .

A collet for placing a die picked up from a wafer on an intermediate stage will be described with reference to Fig. 9 is a sectional view showing an example of a conventional collet for placing a die on an intermediate stage.

The die 4 is picked up from the wafer by the collet 40. For example, the collet 40 provided on the pick-up head of the bonding head sucks the die 4 on the lower surface of the tip end 401 of the collet 40 by the suction operation of a vacuum adsorption mechanism not shown. The collet 40 sucking the die 4 is suitably driven in the X direction (horizontal direction), the Y direction (depth direction) and the Z direction (up and down direction) by a driving mechanism (not shown) Lt; RTI ID = 0.0 > 444 < / RTI >

9, the collet 40 is then lowered to stop at a position where the lower surface of the adsorbed die 4 is in contact with the surface of the intermediate stage 444. As shown in Fig.

Next, the collet 40 stops the adsorption of the die 4. The adsorption mechanism (not shown) of the intermediate stage 444 starts to adsorb and the die 4 starts to adsorb the dies on the surface of the intermediate stage 444 at the same time as the adsorption stop of the adsorption of the collet 40, It is placed on the placement surface.

When the collet 40 is lowered and the die 4 contacts the intermediate stage 444, the mold is pushed from the main body 402 of the collet 40 by a cylinder air pressure, a voice coil motor (VCM) 4), the place load is directly applied. That is, the force caused by collision of the lower surface of the tip end 401 of the collet 40 with the surface of the die 4 and the intermediate stage 444 is applied to the die 4.

When the place load is applied, there is a possibility that the die 4 is cracked.

Further, the surface of the intermediate stage 444 is roughened to prevent the DAF (Die Attached Film) on the back surface of the die 4 from adhering to the die surface. In a die having such a DAF attached thereto, the DAF may be deteriorated by the place load. Further, when there is foreign matter on the die placement surface of the intermediate stage 444, there is a possibility that a crack is generated in the die 4. [

Japanese Patent Application Laid-Open No. 2009-246285

As described above, in the conventional collet, when the die is placed on the intermediate stage, the die may be damaged. Further, DAF may be deteriorated.

It is an object of the present invention to provide a collet and a die bonder which do not break the die when the die is picked up from the wafer and placed on the intermediate stage in view of the above problem. It is also an object of the present invention to provide a collet and a die bonder which do not deteriorate the DAF when the DAF is attached to the die.

In order to achieve the above object, the present invention has at least the following features.

The collet of the present invention has a flat adsorbing surface for adsorbing an upper surface of a die and a tip portion having a foot surrounding the side of the adsorbed die and the foot depth of the tip portion is larger than the thickness of the die, .

The collet of the first aspect of the present invention further includes a collet holder for inserting and fixing the distal end portion.

According to a third aspect of the present invention, in the collet of the first or second aspect of the present invention, the foot has a shape surrounding two sides, three sides, or four sides opposite to the side face of the above- do.

The die bonder of the present invention comprises a die supply part for holding a wafer, a pick-up head for picking up the die from the wafer and placing the die on an intermediate stage, picking up the die from the intermediate stage, Wherein the pick-up head has a flat adsorbing surface for adsorbing an upper surface of the die, and a tip portion provided with a foot for surrounding the side surface of the adsorbed die, wherein the tip of the pick- The fourth feature of the present invention is that the foot has a collet having a depth greater than the thickness of the die.

In the die bonder according to the fourth aspect of the present invention, the collet also has a collet holder for inserting and fixing the tip end portion.

In the die bender of the fourth or fifth aspect of the present invention, it is preferable that the foot of the distal end portion has a shape surrounding two sides, three sides, or four sides opposite to the side surface of the adsorption face, .

The present invention is also applicable regardless of whether or not the DAF is attached to the die.

According to the present invention, when a die is picked up from a wafer and placed on an intermediate stage, it is possible to realize a collet and a die bonder free from breakage of the die. Further, according to the present invention, when DAF is attached to a die, it is possible to realize a collet and a die bonder free from DAF deterioration.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a conceptual view of a die bonder as viewed from above, which is an embodiment of the present invention. Fig.
2 is a perspective view showing an outer appearance of a pick-up apparatus according to an embodiment of the present invention.
3 is a schematic sectional view showing a main part of a pick-up apparatus according to an embodiment of the present invention;
4 is a schematic side view of the main part of one embodiment of the die bonder of the present invention.
5 is a cross-sectional view showing the configuration of one embodiment of the collet of the present invention.
6 is a cross-sectional view showing the configuration of one embodiment of the collet of the present invention.
7 is a cross-sectional view showing a configuration of one embodiment of a conventional collet;
8 is a cross-sectional view showing the configuration of an embodiment of the collet of the present invention.
9 is a cross-sectional view showing an example of a conventional collet for placing a die on an intermediate stage;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the description of each drawing, the same reference numerals are assigned to constituent elements having a common function, and redundant explanations are avoided whenever possible.

Example 1

Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 to 6. Fig.

One embodiment of the die bonder of the present invention will be described with reference to Fig. 1 is a conceptual view of an embodiment of a die bonder of the present invention viewed from above. Reference numeral 100 denotes a die bonder, reference numeral 1 denotes a wafer supply unit, reference numeral 2 denotes a workpiece feed / carry unit, reference numeral 3 denotes a die bonding unit, and reference numeral 10 denotes a control unit for controlling operations of the die bonder.

The die bonders have a wafer feeder 1, a workpiece feed / transfer section 2, and a die bonding section 3 in a largely different manner.

In the wafer supply section 1, reference numeral 11 denotes a wafer cassette lifter, and reference numeral 12 denotes a pickup device. In the work supply / carry section 2, reference numeral 21 denotes a stack loader, reference numeral 22 denotes a frame feeder, and reference numeral 23 denotes unloader. In the die bonding section 3, reference numeral 31 denotes a substrate check section and reference numeral 32 denotes a bonding head section.

Reference numeral 10 denotes a control unit which accesses each device of the die bonder 100 and controls each device according to a predetermined program. In Fig. 1, signal lines for accessing each device are omitted.

The wafer cassette lifter 11 has a wafer cassette (not shown) accommodating a wafer ring, and sequentially supplies the wafer ring to the pickup device 12. [ The pickup device 12 moves the wafer ring so that the desired die can be picked up from the wafer ring.

The workpiece supply / transfer section 2 takes charge of the substrate transferring process during the die bonding process. The substrate P (not shown) is supplied to the frame feeder 22 by the stack loader 21 in the work supply / The substrate P supplied to the frame feeder 22 is transported to the unloader 23 via two processing positions on the frame feeder 22. [

The die bonding section 3 is responsible for the die attach process during the die bonding process. In the die bonding section 3, the substrate check section 31 picks up an image of the substrate P conveyed by the frame feeder 22 by a substrate recognition camera (not shown) And transmits the data. The control unit 10 calculates the shift amount between the origin of the die bonder 100 and the reference point on the transferred substrate P by image processing. The correction amount at the time of bonding is calculated from the calculated displacement amount.

In the die bonder 100 of the present invention, the bonding head portion 32 of the die bonding portion 3 has two head portions (not shown), and one of the head portions (pickup head portion) 4) is picked up and placed on the intermediate stage (see Fig. 4). Further, the other head part (the attachment head part) picks up the die 4 placed on the intermediate stage and dies it onto the substrate P (see Fig. 2 or Fig. 3).

That is, the pick-up head of the bonding head 32 picks up the die 4 from the wafer by the collet 6 and moves the picked up die 4 up and parallel to the die surface of the intermediate stage Move it up. That is, the collet 6 sucking the die 4 is appropriately driven in the X direction (horizontal direction), the Y direction (depth direction), and the Z direction (vertical direction) by a drive mechanism And moves just above intermediate stage 444. Thereafter, the collet 6 of the pick-up head portion is lowered, and the die 4 is placed on the die placement surface.

The attaching head portion of the bonding head portion 32 picks up the die 4 from the intermediate stage by the suction nozzle portion 56 and moves the picked up die 4 up and parallel to the frame feeder 22, To the bonding point. That is, the suction nozzle unit 56 sucking the die 4 is appropriately moved in the X direction (horizontal direction), the Y direction (depth direction) and the Z direction (vertical direction) by a drive mechanism And moves on the substrate P just above the bonding point. Thereafter, the suction nozzle 561 of the suction nozzle unit 56 descends to bond (die attach) the die 4 onto the substrate P. At this time, the control section 10 corrects the position to which the die 4 is attached by using the correction amount by the image picked up by the substrate check section 31, and bonds the position.

Further, the wafer supply unit 1 is responsible for the peeling process in the die bonding process. In the wafer supplying section 1, the wafer cassette lifter 11 has a wafer cassette (not shown) accommodating wafer rings, and sequentially supplies the wafer ring to the pick-up device 12. The detailed configuration and operation of the pickup device 12 will be described with reference to FIG. 2 and FIG. 3 which will be described later.

The configuration of the pickup device 12 will be described with reference to Figs. 2 and 3. Fig. Fig. 2 is a diagram showing an external perspective view of the pickup device 12. Fig. 3 is a schematic cross-sectional view showing a main part of the pickup device 12. Fig. In the pickup device 12, reference numeral 5 denotes a wafer, reference numeral 4 denotes individual dies of the wafer 5, reference numeral 14 denotes wafer ring, reference numeral 15 denotes expanding, reference numeral 16 denotes a dicing tape, A ring 18, a die attach film (die bonding tape), and a push-up unit 50.

As shown in Figs. 2 and 3, a die attach film (DAF) 18 is adhered to the backside (lower surface) of the wafer 5, and a dicing tape 16 Respectively. The edges of the dicing tape 16 are fixedly held by the wafer ring 14 and the expander ring 15.

That is, the pick-up device 12 includes an extender ring 15 for holding a wafer ring 14, a die ring 14 held by the wafer ring 14 and having a plurality of dies 4 (wafers 5) A supporting ring 17 for horizontally positioning the singing tape 16 and a pushing unit 50 disposed inside the supporting ring 17 for pushing up the die 4 upward.

The push-up unit 50 is moved up and down by a driving mechanism (not shown). The movement for positioning of the push-up unit 50 to the pick-up die 4 is performed by moving the wafer ring 14 in the horizontal (X) direction and pushing in the depth (Y) direction Although the unit 50 is to be moved, it is obvious that the unit 50 can be relatively moved. The movement for positioning of the collet 6 (see Fig. 4) and the die 4 to be picked up is also the same.

In recent years, the adhesive for die bonding has a structure in which a film-like adhesive material such as a DAF (18) is adhered between the wafer (5) and the dicing tape (16) In the wafer 5 having the DAF 18 on the back side, dicing is performed on the wafer 5 and the DAF 18. [ Although dicing tape 16 and DAF 18 are integrated with each other in recent years, dicing is performed on wafer 5 and DAF 18 in this case as well.

Up device 12 lowers the expander ring 15 holding the wafer ring 14 when the die 4 is pushed up. At this time, since the support ring 17 does not descend, the dicing tape 16 held on the wafer ring 14 is stretched to enlarge the distance between the dies 4, And the die to be picked up is spaced apart, so that it can be easily pushed up.

The push-up unit 50 pushes up the die 4 from below and improves the pick-up performance of the die 4 by the collet 6. In the wafer 5 having the die attach film 18, dicing is performed on the wafer 5 and the die attach film 18. The die 4 and the die attach film 18 are peeled off from the dicing tape 16 and the distal end portion 461 of the collet 6 ) Picks up the die 4 by suction.

Figure 4 is a schematic side view of the main part of one embodiment of the die bonder of the present invention. The die bonder in Fig. 4 is an example in which the transfer intermediate stage is used to correct the die suction position and correctly execute the die attach. Reference numeral 100 denotes a die bonding body, reference numeral 12 denotes a pickup device, reference numeral 444 denotes an intermediate stage, reference numeral 3 denotes a die bonding portion for performing a die attach operation, reference numeral 4 denotes a die, reference numeral 6 denotes a die 4, (444) of the bonding head (32). Likewise, reference numeral 56 denotes a suction nozzle portion provided on the attachment head portion of the bonding head portion 32 for adsorbing the die 4 and attaching it to the substrate P. [ Reference numeral 461 denotes a tip end of the collet, and reference numeral 561 denotes a suction nozzle for the suction nozzle portion 56. Reference numeral 5 denotes a wafer, reference numeral 14 denotes a wafer ring for holding the wafer 5, reference numeral 450 denotes a push-up unit for pushing the die 4 from below to peel the die from the dicing tape, Reference numeral P denotes a substrate which is a member to be mounted on which the die 4 is mounted and reference numeral 13 denotes an attaching table of the die bonding section 3. Reference numeral 45 denotes a resin coating portion on the upper surface (surface) of the intermediate stage 444, reference numeral 62 denotes an upper surface of the attachment table 13, reference numeral 130 denotes an opening of the upper surface of the attachment table 13, And a heating device for heating the detachable table 13. The inside of the dashed frame 500 represents the vicinity of the intermediate stage 444 of the die bonding portion 3. In Fig. 4, the die recognition camera is not shown.

The operations from the steps (1) to (4) until the die 4 is picked up from the wafer 5 and placed on the intermediate stage 444 will be described with reference to Fig. This operation is executed by a command of the control unit 10. [

4, a semiconductor wafer (simply referred to as a wafer in this specification) 5, in which a plurality of dies 4 are gathered, is held in the wafer ring 14 of the pickup device 12. The wafers 5 are diced so as to be picked up separately for each die 4.

(Procedure 1) Pickup Step

The lifting unit 450 pushes the die 4 to be picked up on the wafer 5 from below and peels the die 4 from the dicing tape adhered to the back surface of the wafer 5. [ On the other hand, the distal end portion 461 of the collet 6 descends to just above the die 4 to be picked up, and the die 4 peeled off from the dicing tape is vacuum-absorbed.

(Procedure 2) The collet moving step

The collet 6 moves the tip end portion 461 of the collet 6 to the upper side of the die surface of the surface of the intermediate stage 444 by performing a movement operation such as a rising operation or a parallel moving operation after vacuum suctioning the die 4, do.

(Procedure 3) The collet descent step

The collet 6 performs a lowering operation for lowering the tip portion 461 to a predetermined height of the intermediate stage 444. [

(Procedure 4) The die placement step

The collet 6 stops the suction operation. At the same time or after a predetermined time elapses, the intermediate stage 444 initiates the adsorption operation. As a result, the die 4 is placed on the die surface of the intermediate stage 444.

Each adsorption mechanism of the collet 6, the intermediate stage 444 and the adsorption nozzle unit 56 appropriately controls the adsorption start operation or the stop operation by a command from the control unit 10 And contributes to the normal operation of the die bonder 100. [

The die 4 placed on the intermediate stage 444 is picked up by the image pick-up unit (die recognition camera) for die position confirmation and the picked-up image is transmitted to the control unit 10 of the die bonder 100. [ The control unit 10 calculates the displacement amounts (X, Y, and? Directions) of the die 4 on the intermediate stage 444 from the die position reference point of the die bonder by image processing. In addition, the die position reference point previously holds a predetermined position of the intermediate stage 444 as the initial setting of the apparatus. The &thetas; direction refers to the direction of rotation on the XY plane.

The control unit 10 corrects the suction position of the suction nozzle unit 56 based on the displacement of the calculated die 4 and sucks the die 4. [ The adsorption nozzle unit 56 adsorbing the die 4 from the intermediate stage 444 performs vacuum suction on the die 4 and then ascends and translates and descends to move the die 4 to the die attach table 13 The die 4 is attached to a predetermined position of the substrate P on the substrate P.

Further, similarly to the die recognition camera, the substrate P placed on the attachment table 13 is also picked up by an image pickup apparatus (substrate recognition camera) for substrate position confirmation (not shown), and the picked- And transmitted to the control unit. The control unit 10 calculates the shift amounts (X, Y, and θ directions) of the substrate P from the substrate position reference point of the die bonder by image processing. In addition, the substrate position reference point holds a predetermined position of the substrate check unit as an initial setting of the apparatus in advance.

5 and 6, an embodiment of the collet of the present invention will be described. 5 and 6 are cross-sectional views showing the configuration of one embodiment of the collet of the present invention.

The collet 6 of the embodiment of the present invention is composed of a body portion 602 and a distal end portion 601 provided below the body portion 602. The distal end portion 601 has a flat bottom surface capable of adsorbing the upper surface of the die 4 and a plurality of suction holes (not shown) for allowing the collet 6 to attract the die 4 , See Fig. 8).

The distal end portion 601 is provided with a skirt-like foot 603 so as to surround the side (periphery) of the die 4 to be adsorbed to the bottom surface 604 which is the adsorption surface. The foot 603 serves to efficiently adsorb the die 4 when the die 4 is adsorbed by cutting off the ambient atmosphere and bringing the periphery of the die 4 close to the vacuum state have.

The dimension of the opening of the foot 603 is substantially equal to the size (X, Y direction) of the die 4 and the die 4 is received in the opening of the foot 603 and the bottom surface 604 of the die 4 And the upper surface is adsorbed. The larger the size of the opening, the more easily the die 4 enters but the poorer the adsorption efficiency. Further, the smaller the size of the opening, the better the efficiency of adsorption of the die 4, but it becomes difficult to enter the opening. Therefore, the size of the opening of the foot 603 needs to be appropriately designed in consideration of both.

5 or 6, the length d from the lower surface of the tip end portion 601 is set to be larger than the thickness t of the die 4 to be attracted (t <d).

Therefore, even if the collet 6 on which the die 4 is attracted is lowered and the distal end portion 601 of the collet 6 is lowered and brought into contact with the die placement surface of the intermediate stage 444, The bottom surface of the die 603 comes into contact with the die surface, and does not descend further. As a result, the die 4 does not directly contact the die surface of the intermediate stage 444.

Another embodiment of the operations from (Steps 1) to (4) until the die 4 is picked up from the wafer 5 described with reference to Fig. 4 and placed on the intermediate stage 444 will be described with reference to Figs. 5 and 6 Lt; RTI ID = 0.0 &gt; collet &lt; / RTI &gt;

The operation of the pick-up step (procedure 1) is performed so that the die 4 is sucked to the bottom surface 604 of the distal end portion 601 of the collet 6.

Then, the collet moving step (procedure 2) is executed, and the collet 6 moves just above the die surface of the surface of the intermediate stage 444. [

Next, a collet descent step (procedure 3) is executed. At this time, the collet 6 descends, and the lowermost surface of the foot 603 of the distal end portion 601 comes into contact with the surface (die placement surface) of the intermediate stage 444. That is, the bottom surface of the foot 603 is lowered until it contacts the surface of the intermediate stage 444. [ 5, since the thickness t of the die 4 is smaller than the height d of the feet 603, the lower surface of the die 4 adsorbed to the tip end portion 601 is located on the lower surface of the intermediate stage 444 It does not touch the surface.

In the die placement step (procedure 4), the collet 6 stops the suction of the die 4. At the same time, or after a lapse of a predetermined time after the adsorption of the die 4 is stopped, the intermediate stage 444 adsorbs the die 4. As a result, the die 4 is placed on the intermediate stage 444, as shown in Fig.

Thereafter, the collet 6 of the pick-up head performs the ascending operation and the parallel moving operation to perform an operation of picking up the next die. The die 4 mounted on the intermediate stage 444 is also diced onto the substrate P by the operation of the bonding head 32.

According to the embodiments of Figs. 5 and 6 described above, when placing the die on the intermediate stage, no place load due to collision between the collet or the tip, the die, and the die surface is applied, There is no DAF deterioration.

By way of example, the die 4, after the adsorption of the collet 6 has been released from the adsorption, stops adsorption of the die, and the intermediate stage 444 activates the adsorption mechanism to initiate the adsorption of the die 4, Falls by the height alpha (alpha = d-t) and lands on the intermediate stage 444. [ However, since the drop distance is small, only a very small force is applied to the die 4, so there is no breakage of the die and no DAF deterioration occurs.

Further, for example, the die 4 naturally drops and lands on the intermediate stage 444 after the die 4 releases the adsorption of the collet 6 or a predetermined time elapses from the stop of adsorption of the die, 444 on the die mounting surface. However, since the falling distance is small and the self weight of the die is small, only a very small force is applied to the die 4, so there is no breakage of the die and no deterioration of the DAF.

5 and 6, the feet 603 surround the entire outer periphery of the side surface of the die 4. [ However, it is not necessary to surround the entire outer periphery, and for example, for a predetermined length below the side surface or the side surface of the die 4, the entire outer periphery is surrounded. A foot 603 having a height d greater than the thickness t of the die 4 may be provided on the side or the four sides. The thickness and shape of the feet may be arbitrary.

The present invention is also applicable regardless of whether or not the DAF is attached to the die.

In addition, after the collet 6 releases the adsorption or after a predetermined period of time has elapsed from the adsorption stop of the die, air is blown toward the die 4 instead of being sucked, and the die 4 is moved toward the intermediate stage 444 It may be mounted on the die mounting surface. This makes it possible to quickly and surely mount the die.

Example 2

Hereinafter, one embodiment of the collet of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 is a cross-sectional view showing the structure of a collet among pick-up heads of the bonding head 32, according to an embodiment of a conventional collet. 8 is a cross-sectional view showing the structure of a collet among pick-up heads of the bonding head 32 according to one embodiment of the collet of the present invention. Also in the second embodiment, the die bonders described in Figs. 1 to 4 of the first embodiment are used.

7 is a cross-sectional view showing the configuration of the tip end 401 of the collet 40 of the bonding head 32, as an example of a conventional collet, for comparison with the collet of the second embodiment of the present invention. 8 is a cross-sectional view showing the configuration of the distal end portion 461 of the collet portion 6 of the bonding head 32 according to one embodiment of the collet of the present invention. Reference numerals 40 and 86 denote a collet. Denoted at 41 is a collet holder. Denoted at 42 and 82 are tip ends. Denoted at 41v is an attracting hole of the collet holder 41. Denoted at 42v is an attracting hole at the tip end, A numeral 82v denotes a suction hole of the tip end portion 82, and a numeral 82t denotes a foot (flange) of the tip end portion 82. [

7, the collet 40 of the pick-up head portion of the bonding head 32 includes a tip portion 42, a collet holder 41 for holding the tip portion 42, and a collet holder There are a suction hole 41v for sucking the die 4 and a suction hole 42v for sucking the die 4 formed at the tip end portion 42. [ Arrows in Fig. 7 indicate the direction in which the collet 40 sucks the die 4. 7, when the die 4 is mounted on the intermediate stage 444, the die 4 of the lower surface of the tip end portion 401 of the collet 40 A force due to collision with the surface of the intermediate stage 444 is applied to the die 4. Therefore, there is a risk of breakage of the die or DAF deterioration.

The collet 86 of the embodiment of the present invention shown in Fig. 8 is composed of a collet holder (body portion) 41 and a distal end portion 82 provided below the collet holder 41 in the same manner as the collet of Embodiment 1 . The distal end portion 82 has a flat bottom surface capable of adsorbing the upper surface of the die 4 and the bottom surface 45 has a plurality of suction holes 82v for allowing the collet 6 to absorb the die 4 have.

The distal end portion 82 is provided with a skirt-like foot 82t so as to surround the side (periphery) of the die 4 to be adsorbed on the bottom surface 45 which is the adsorption surface. The foot 82t serves to efficiently adsorb the die 4 when the die 4 is adsorbed by cutting off the ambient atmosphere and bringing the periphery of the die 4 close to the vacuum state have.

The dimension of the opening of the foot 82t is substantially equal to the size (X, Y direction) of the die 4 and the die 4 enters the opening of the foot 82t, And the upper surface is adsorbed. The larger the size of the opening, the more easily the die 4 enters but the poorer the adsorption efficiency. Further, the smaller the size of the opening, the better the efficiency of adsorption of the die 4, but it becomes difficult to enter the opening. Therefore, the size of the opening of the foot 82t needs to be appropriately designed in consideration of both.

6, the length d from the lower surface of the distal end portion 82 is set to be larger than the thickness t of the die 4 to be absorbed (t <d).

Therefore, even if the collet 86 to which the die 4 is adsorbed is lowered and the distal end portion 82 of the collet 86 is brought down and brought into contact with the die surface of the intermediate stage 444, The bottom surface of the die 82t is brought into contact with the die surface, and the die surface is not lowered further. As a result, the die 4 does not directly contact the die surface of the intermediate stage 444.

The operations (Steps 1) to (4) until picking up the die 4 from the wafer 5 described with reference to FIG. 4 and placing it on the intermediate stage 444 are the same as those of the collet 86 ) Can be used.

According to the embodiment of Fig. 8 described above, when the die is placed on the intermediate stage, no place load due to collision between the collet or the tip, die, and die placement surface is applied. Therefore, there is no breakage of the die, There is no.

By way of example, the intermediate stage 444 activates the adsorption mechanism to initiate the adsorption of the die 4, simultaneously with the adsorption stop of the die after the die 4 releases adsorption of the collet 86, Falls by the height alpha (alpha = d-t) and lands on the intermediate stage 444. [ However, since the drop distance is small, only a very small force is applied to the die 4, so there is no breakage of the die and no DAF deterioration occurs.

The present invention is also applicable regardless of whether or not the DAF is attached to the die.

Further, for example, the die 4 naturally falls and lands on the intermediate stage 444 after the die 4 releases the adsorption of the collet 86 or a predetermined time elapses from the stop of adsorption of the die, 444 on the die mounting surface. However, since the falling distance is small and the self weight of the die is small, only a very small force is applied to the die 4, so there is no breakage of the die and no deterioration of the DAF.

In the embodiment of Fig. 8, the feet 82t surround the entire outer periphery of the side surface of the die 4. However, it is not necessary to surround the entire outer periphery, and for example, for a predetermined length below the side surface or the side surface of the die 4, the entire outer periphery is surrounded. A foot 82t having a height d larger than the thickness t of the die 4 may be provided on the side or the four sides. The thickness and shape of the feet may be arbitrary.

In addition, after the collet 86 releases the adsorption or after a predetermined period of time has elapsed from the adsorption stop of the die, the air is sprayed toward the die 4, not the suction, and the die 4 is moved toward the intermediate stage 444 It may be mounted on the die mounting surface. This makes it possible to quickly and surely mount the die.

According to the first or second embodiment, when placing the die on the intermediate stage, the place load due to the collision of the collet or the front end portion, the die, and the die placement surface is not applied. Therefore, even if the die thickness is thin, And there is no deterioration of the DAF.

The present invention is also applicable regardless of whether or not the DAF is attached to the die.

As a recent tendency, the effect of the present invention is large in view of the thinness of the die.

The embodiments of the present invention have been described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. , &Lt; / RTI &gt; It is to be understood that the present invention is not limited to the above-described embodiment, and that various changes and modifications may be made without departing from the spirit and scope of the invention, It goes without saying that the invention is included.

1: wafer supply section
2: Workpiece supply /
3: Die bonding part
4: Die
5: wafer
6: Collet
10:
11: Wafer cassette lifter
12: Pickup device
13: Attachment table
14: Wafer ring
15: Expand Ring
16: Dicing tape
17: Support ring
18: Die attach film (DAF)
21: Stack Loader
22: frame feeder
23: Unloader
31: Substrate check section
32: bonding head
40: Collet
41: collet holder
42:
41v: The suction hole of the collet holder 41
42t: the flange of the tip 42
42v: the suction hole of the distal end portion 42
45: Resin coating part
46: Vacuum room
50: Push-up unit
56: suction nozzle section
62: upper surface
82:
82t: Foot (Flange)
82v: the suction hole of the tip end portion 82
86: Collet
100: die bonder
130: opening
140: Heating device
401:
402:
444: Intermediate stage
450: Push up unit
461:
561: Adsorption nozzle
601: Collet
602:
603: Foot
604: Bottom
P: substrate

Claims (6)

A flat adsorbing surface for adsorbing an upper surface of the die and a distal end having a foot surrounding the side of the adsorbed die wherein the depth of the foot at the distal end is greater than the thickness of the die. The method according to claim 1,
And a collet holder for inserting and fixing the distal end portion. 3. The method according to claim 1 or 2,
Wherein the foot has a shape surrounding two sides, three sides, or four sides opposite to the side surface of the adsorption face. A die supply portion for holding the wafer,
A pick-up head for picking up a die from the wafer and placing the die on an intermediate stage,
An actuator for picking up the die from the intermediate stage and bonding the substrate onto the die,
And,
Wherein the pick-up head has a flat adsorbing surface for adsorbing an upper surface of the die, and a collet having a tip end provided with a foot surrounding a side surface of the sucked die, the tip of the foot having a depth greater than the thickness of the die And the die bonder. 5. The method of claim 4,
Wherein said collet also has a collet holder for inserting and fixing said distal end. The method according to claim 4 or 5,
And the foot of the distal end portion has a shape surrounding two sides, three sides, or four sides opposite to the side surface of the adsorption face.
KR1020140100346A 2013-08-09 2014-08-05 Collet and die bonder KR101666276B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013166600A JP6341641B2 (en) 2013-08-09 2013-08-09 Die bonder
JPJP-P-2013-166600 2013-08-09

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KR20150018405A true KR20150018405A (en) 2015-02-23
KR101666276B1 KR101666276B1 (en) 2016-10-13

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Country Link
JP (1) JP6341641B2 (en)
KR (1) KR101666276B1 (en)
CN (1) CN104347435B (en)
TW (1) TW201521138A (en)

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TWI562263B (en) 2016-12-11
JP2015035548A (en) 2015-02-19
CN104347435B (en) 2018-09-11
JP6341641B2 (en) 2018-06-13
CN104347435A (en) 2015-02-11
KR101666276B1 (en) 2016-10-13
TW201521138A (en) 2015-06-01

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