JPH0626253U - Bonding device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is not necessary to use a special material for the clamper member, and the clamper member can flow along the lead frame without being firmly fixed to the clamper body. Provides frame retainer. [Structure] A frame presser 10 is composed of a clamper member 30 for pressing a lead frame, a clamper body 20 on which the clamper member 30 is mounted, and a wave washer 12 for elastically pressing the clamper member 30 against the clamper body 20.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bonding device, and more particularly to a frame pressing structure for pressing a lead frame.

[0002]

[Prior art]

 For example, in the thermocompression bonding wire bonding apparatus combined with ultrasonic waves, as shown in FIG. 4, a lead frame 2 to which a die 1 is fixed is placed on a frame placing table 3 having a built-in heater, and a frame holder 4 that moves up and down 4 is provided. With this, it is pressed and fixed on the frame mounting table 3 and heated to a predetermined temperature (160 to 300 ° C.). Then, the ultrasonic transducer 7 is oscillated in a state in which the wire 6 is pressed against the electrode of the die 1 or the lead portion 2a of the lead frame 2 by the capillary 5, and the wire 6 is caused to oscillate the wire 6 or the lead portion of the lead frame 2. 2a.

As described above, since the lead frame 2 is pressed against the frame mounting table 3 by the frame pressing member 4, the pressing surface of the frame pressing member 4 needs to be parallel to the upper surface of the frame mounting table 3. is there. For this reason, when the frame retainer 4 is made of only metal, it is necessary to perform parallel alignment of the frame retainer 4 with high accuracy, which requires a great amount of adjustment time, and the frame retainer 4 may lead due to a parallel alignment error. It is impossible to evenly press the lead portions 2a against the frame 2 evenly.

The above-mentioned problems can be solved by providing an elastic portion 4b as a clamper member on the lower surface of the clamper body 4a of the frame retainer 4. That is, when the lead frame 2 is pressed by the frame retainer 4, the elastic portion 4b is deformed to absorb the parallel deviation error of the frame retainer 4, so that the lead frame 2 does not have to be parallelized with high accuracy. Each of the two lead portions 2a can be pressed evenly. An example of a bonding device having such a frame retainer 4 is shown in Japanese Utility Model Publication No. 2-5536.

[0005]

[Problems to be solved by the device]

 Since the lead frame 2 is heated to about 160 to 300 ° C., the elastic member 4b of the frame holder 4 needs to be heat resistant, and the clamper body 4a and the elastic member 4b are firmly fixed. is necessary. Therefore, in the above conventional technique, it is necessary to use a special material having excellent heat resistance. Further, the clamper main body 4a and the elastic portion 4b need to be firmly fixed, but no consideration is given to this fixing.

An object of the present invention is that it is not necessary to use a special material for the clamper member, and the clamper member can follow the lead frame and flow without being firmly fixed to the clamper body. It is to provide a bonding device equipped with a simple frame retainer.

[0007]

[Means for Solving the Problems]

 To achieve the above object, the structure of the present invention is a bonding apparatus that bonds a lead frame while it is being pressed by a frame holder on a frame mounting table. It is characterized by comprising a clamper main body on which the ramper member is placed, and a spring member which elastically presses the clamper member against the clamper main body.

[0008]

[Action]

 When the lead frame is pressed by the frame retainer, the clamper member is pushed upward and the spring member elastically deforms, creating a gap between the clamper body and the clamper member, and the clamper member is elastically deformed in the floating state. Press the lead frame against the frame mounting table by floating it so that it follows the frame mounting table. As a result, each lead portion of the lead frame is evenly pressed by the clamper member. That is, the clamper member may be made of metal, and it is not necessary to firmly fix the clamper member to the clamper body.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the frame retainer 10 includes a clamper body 20, a clamper member 30, a nut 11, a washer 12, and a washer fixing screw 13.

As shown in FIG. 2, the clamper main body 20 is provided with a clamper member mounting portion 21 on which the clamper member 30 is mounted, and the clamper member mounting portion 21 has a central portion at which the clamper member 30 is mounted. An opening hole 22 having a size large enough to allow the frame pressing portion 31 to project downward and face it is provided. The clamper member mounting portions 21 on both sides of the opening hole 22 are provided with nut holes 23 for fixing the nut 11, and the nut holes 23 are press-fitted and caulked as shown in FIG. It is fixed by etc.

As shown in FIG. 3, the clamper member 30 is provided with a bonding hole 32 inside the frame pressing portion 31. Further, a nut insertion hole 33 is provided at a position corresponding to the nut 11 fixed to the clamper main body 20, and a wave washer mounting surface 34 is provided on an upper surface portion of the nut insertion hole 33.

Therefore, the nut insertion hole 33 of the clamper member 30 is inserted into the nut 11 fixed integrally to the clamper body 20, and the clamper member 30 is placed on the upper surface of the clamper member placement portion 21 of the clamper body 20. . Next, the wave washer 12 is inserted into the nut 11 and placed on the wave washer mounting surface 34 of the clamper member 30. Then, the wave washer fixing screw 13 is screwed into the nut 11, a tool such as a wrench is inserted into the turning hole 14 provided in the wave washer fixing screw 13, and the wave washer fixing screw 13 is turned, so that the wave washer 12 is suitable. The strength of the spring property of the wave washer 12 is adjusted so as to have a restoring force. As a result, the clamper member 30 is attached to the clamper body 20 via the wave washer 12.

Next, the operation will be described. When the lead frame is pressed by the frame retainer 10, the clamper member 30 is pushed upward and the wave washer 12 is elastically deformed, so that a gap is created between the clamper body 20 and the clamper member 30. Therefore, the clamper member 30 is pressed against the lead frame by the elastic force of the wave washer 12 in the floating state, and the clamper member 30 floats as if following the frame mounting table 3 (see FIG. 4). And press the lead frame 2 against the frame mounting table 3. As a result, the lead portions 2a of the lead frame 2 are evenly pressed by the clamper member 30. That is, the clamper member 30 may be made of metal, and it is not necessary to firmly fix the clamper member 30 to the clamper body 20.

[0014]

[Effect of device]

 According to the present invention, the frame retainer includes the clamper member for retaining the lead frame, the clamper main body on which the clamper member is placed, and the spring member for elastically pressing the clamper member against the clamper main body. It is not necessary to use a special material for the member, and the clamper member floats following the lead frame even if the clamper member is not firmly fixed to the clamper body.

[Brief description of drawings]

1A and 1B show an embodiment of a frame retainer applied to a bonding apparatus according to the present invention, FIG. 1A is a plan view, and FIG.
FIG. 7A is a sectional view taken along line AA of (a).

2A and 2B show a clamper main body, FIG. 2A is a plan view, and FIG.
FIG. 7A is a sectional view taken along line BB of (a).

3A and 3B show a clamper member, FIG. 3A is a plan view, and FIG.
FIG. 7A is a sectional view taken along line CC of FIG.

FIG. 4 is an explanatory perspective view of a conventional bonding device.

[Explanation of symbols]

 10 Frame holder 12 Wave washer 20 Clamper body 30 Clamper member

Claims (1)

[Scope of utility model registration request] 1. A bonding apparatus for bonding a lead frame while holding a lead frame on a frame mounting table by a frame holder, wherein the frame holder comprises a clamper member for holding the lead frame, and a clamper body on which the clamper member is mounted. And a spring member that elastically presses the clamper member against the clamper body.