Chopping knife for bonding of bonding wire

Abstract

The utility model relates to a chopper for bonding a bonding wire, which aims to solve the technical problem that a copper wire rubs an orifice and is damaged after the copper wire passes through the orifice at present, and comprises a chopper body and a guide structure, the guide structure is arranged at the inlet end of a front end wire hole of the chopper body; the guide structure comprises a guide ring; the guide ring is arranged above the inlet end of the front end wire hole of the chopper body; the bottom side of the guide ring is fixedly connected with the top side of the front end of the chopper body through a plurality of supporting rods distributed in an annular array. Wherein the inner ring side of the guide ring is arranged to be an arc-shaped surface, and the device has the advantages that the copper wire is contacted with the arc-shaped surface through the copper wire of the guide ring, so that the copper wire cannot be damaged after being redirected.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor packaging, in particular to a capillary for bonding wires. Background Art

[0002] Semiconductor packaging refers to the process of processing a tested wafer into an independent chip according to product models and functional requirements. It includes connecting the bonding pads of the wafer to the corresponding pins of the substrate by using ultra-fine metal wires or conductive resins to form the required circuit.

[0003] When semiconductor packaging is bonded, the ultra-fine copper wire is cut by a capillary, and the copper wire passes through the hole at the front end of the capillary. Since the aperture of the hole is not large, after the copper wire passes through, the copper wire will rub against the hole opening and be damaged.

[0004] In view of this, we propose a capillary for bonding wires. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art, meet the actual needs, and provide a capillary for bonding wires to solve the technical problem that after the copper wire passes through, the copper wire will rub against the hole opening and be damaged.

[0006] To achieve the purpose of the utility model, the technical solution adopted by the utility model is: designing a capillary for bonding wires, including a capillary body and further including a guiding structure;

[0007] The guiding structure is arranged at the inlet end of the wire hole at the front end of the capillary body;

[0008] The guiding structure includes a guiding ring;

[0009] The guiding ring is arranged above the inlet end of the wire hole at the front end of the capillary body;

[0010] Wherein, the bottom side of the guiding ring is fixedly connected to the top side of the front end of the capillary body through a plurality of support rods distributed in an annular array;

[0011] Wherein, the inner ring side of the guiding ring is set as an arc surface.

[0012] Preferably, a protection component is arranged on the guiding ring;

[0013] The protection component includes an arc-shaped rubber ring;

[0014] The arc-shaped rubber ring is fitted and clamped with the inner ring side of the guiding ring.

[0015] Preferably, the protection component further includes a rubber snap ring A;

[0016] The rubber snap ring A is arranged at the top end of the arc-shaped rubber ring;

[0017] Among them, the cross-section of the rubber snap ring A is L-shaped, and the rubber snap ring A is clamped and matched with the top of the outer ring of the guiding ring.

[0018] Preferably, a rubber snap ring B is fixedly arranged on the inner side of the vertical section of the rubber snap ring A, and the rubber snap ring B is clamped and matched with an annular groove formed at the top of the outer ring of the guiding ring.

[0019] Preferably, the cross-section of the rubber snap ring B is arc-shaped, and the rubber snap ring B is adapted to the annular groove.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1. By arranging the guiding ring and the support rod, the present utility model has the advantage that the copper wire passing through the guiding ring contacts the arc surface, and the redirection will not damage the copper wire, solving the problem that the copper wire will be damaged due to friction at the hole opening after the copper wire is threaded through because the aperture of the hole is not large.

[0022] 2. By arranging the arc-shaped rubber ring, the present utility model has the advantage that the copper wire passing through the guiding ring contacts the arc-shaped rubber ring, protecting the copper wire while not affecting the passing of the copper wire.

[0023] 3. By arranging the rubber snap ring A, the present utility model has the advantage of positioning the arc-shaped rubber ring by the clamping connection between the rubber snap ring A and the top of the outer ring of the guiding ring, facilitating the replacement of the arc-shaped rubber ring.

[0024] 4. By arranging the rubber snap ring B and the annular groove, the present utility model has the advantage of further positioning the rubber snap ring A, and further keeping the arc-shaped rubber ring stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0026] Figure 2 is a schematic diagram of the guiding structure of the present utility model;

[0027] Figure 3 is a schematic diagram of the sectional decomposition structure of the guiding ring and the protection component of the present utility model;

[0028] Figure 4 is of the present utility model Figure 3 magnified schematic diagram at A;

[0029] Figure 5 is a schematic diagram of the sectional connection structure of the guiding ring and the protection component of the present utility model;

[0030] In the figure: 1. Bonder body; 2. Guiding structure;

[0031] 201. Guide ring; 202. Support rod; 203. Protection component;

[0032] 2011. Arc surface; 2012. Annular groove;

[0033] 2031. Arc-shaped rubber ring; 2032. Rubber snap ring A; 2033. Rubber snap ring B. Detailed implementation mode

[0034] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0035] Embodiment 1: A splitting knife for bonding wire bonding, see Figures 1 to 5 , including a splitting knife body 1, and further including a guiding structure 2; the guiding structure 2 is arranged at the entrance end of the wire hole at the front end of the splitting knife body 1;

[0036] The guiding structure 2 includes a guide ring 201; the guide ring 201 is arranged above the entrance end of the wire hole at the front end of the splitting knife body 1; the inner diameter of the guide ring 201 is larger than the aperture of the entrance of the wire hole at the front end of the splitting knife body 1; wherein, the bottom side of the guide ring 201 is fixedly connected to the top side of the front end of the splitting knife body 1 through a plurality of support rods 202 arranged in an annular array; the bottom end of the support rod 202 is fixed to the top side of the front end of the splitting knife body 1, and the top end of the support rod 202 is fixed to the bottom side of the guide ring 201; wherein, the inner ring side of the guide ring 201 is set as an arc surface 2011.

[0037] By setting the guide ring 201 and the support rod 202, the present utility model has the advantage that the copper wire passing through the guide ring 201 contacts the arc surface 2011, and the redirection will not damage the copper wire, solving the problem that the copper wire will be damaged due to friction at the hole opening after the copper wire passes through because the aperture of the hole is not large.

[0038] Specifically, a protection component 203 is arranged on the guide ring 201;

[0039] The protection component 203 includes an arc-shaped rubber ring 2031; the arc-shaped rubber ring 2031 is fitted and clamped with the inner ring side of the guide ring 201.

[0040] By setting the arc-shaped rubber ring 2031, the present utility model has the advantage that the copper wire passing through the guide ring 201 contacts the arc-shaped rubber ring 2031, protecting the copper wire without affecting the passage of the copper wire.

[0041] Furthermore, the protection component 203 further includes a rubber snap ring A2032;

[0042] The rubber snap ring A2032 is arranged at the top end of the arc-shaped rubber ring 2031; wherein, the cross section of the rubber snap ring A2032 is L-shaped, and the rubber snap ring A2032 is in snap-fit connection with the top of the outer ring of the guide ring 201.

[0043] The utility model is provided with a rubber snap ring A2032, which has the advantages of positioning the arc-shaped rubber ring 2031 by clamping the rubber snap ring A2032 with the top of the outer ring of the guide ring 201, and facilitating the replacement of the arc-shaped rubber ring 2031.

[0044] Furthermore, a rubber snap ring B2033 is fixedly arranged on the inner side of the vertical section of the rubber snap ring A2032, and the rubber snap ring B2033 is in clamping fit with an annular groove 2012 formed at the top of the outer ring of the guide ring 201; the cross section of the rubber snap ring B2033 is arc-shaped, and the rubber snap ring B2033 is adapted to the annular groove 2012.

[0045] The utility model is provided with the rubber snap ring B2033 and the annular groove 2012, which has the advantages of further positioning the rubber snap ring A2032 and further maintaining the stability of the arc-shaped rubber ring 2031.

[0046] Working principle: When using the device of the utility model, the splitting knife body 1 is installed and positioned, and the copper wire passing through penetrates through the guide ring 201 and enters the front wire hole of the splitting knife body 1 and passes through. The copper wire passing through the guide ring 201 contacts the arc-shaped rubber ring 2031, which protects the copper wire while not affecting the passing of the copper wire.

[0047] After the arc-shaped rubber ring 2031 is damaged, expand the rubber snap ring A2032 and remove it. The rubber snap ring B2033 leaves the annular groove 2012, so as to remove the damaged arc-shaped rubber ring 2031. Install a new arc-shaped rubber ring 2031, expand the rubber snap ring A2032 to be clamped with the top of the outer ring of the guide ring 201, and the rubber snap ring B2033 is clamped and positioned with the annular groove 2012. At this time, the new arc-shaped rubber ring 2031 fits the arc-shaped surface 2011 of the inner ring of the guide ring 201.

[0048] The embodiments disclosed in the utility model are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the utility model according to the above embodiments and make different extensions and changes. As long as they do not depart from the spirit of the utility model, they are within the protection scope of the utility model.

Claims

1. A splitter for bonding wire, comprising a splitter body (1), characterized in that: Also includes: A guide structure (2) is arranged at an entrance end of the front wire hole of the riving knife body (1); The guiding structure (2) comprises: A guide ring (201) is arranged above the entrance end of the front wire hole of the riving knife body (1); The bottom side of the guide ring (201) is fixedly connected to the top side of the front end of the chopper body (1) via a plurality of support rods (202) distributed in a ring array; Wherein, the inner ring side of the guide ring (201) is configured as an arc-shaped surface (2011).

2. A bonding wire bonding knife as claimed in claim 1, characterized in that: A protection component (203) is arranged on the guide ring (201); The protection component (203) comprises: The arc-shaped rubber ring (2031) is fitted and clamped with the inner ring side of the guide ring (201).

3. A bonding wire bonding knife as claimed in claim 2, characterized in that: The protection component (203) further includes: A rubber clamping ring A (2032), arranged at the top end of the arc-shaped rubber ring (2031); The cross section of the rubber clamping ring A (2032) is L-shaped, and the rubber clamping ring A (2032) is clamped and matched with the top of the outer ring of the guide ring (201).

4. A bonding wire bonding knife as claimed in claim 3, characterized in that: A rubber clamping ring B (2033) is fixedly provided on the inner side of the vertical section of the rubber clamping ring A (2032), and the rubber clamping ring B (2033) is clamped and matched with an annular groove (212) provided on the top of the outer ring of the guide ring (201).

5. A bonding wire bonding knife as claimed in claim 4, characterized in that: The cross section of the rubber clamp ring B (2033) is arc-shaped, and the rubber clamp ring B (2033) is compatible with the annular groove (2012).

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