CN204596772U - Pad pasting ball bonding pressing plate after a kind of QFN - Google Patents
Pad pasting ball bonding pressing plate after a kind of QFN Download PDFInfo
- Publication number
- CN204596772U CN204596772U CN201520253250.6U CN201520253250U CN204596772U CN 204596772 U CN204596772 U CN 204596772U CN 201520253250 U CN201520253250 U CN 201520253250U CN 204596772 U CN204596772 U CN 204596772U
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- pressing
- pressing plate
- ball bonding
- qfn
- pad pasting
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Abstract
The utility model relates to pad pasting ball bonding pressing plate after a kind of QFN, it comprises pressing plate body (1), described pressing plate body (1) center offers pressing window (5), extended obliquely bottom described pressing window (5) left and right sides have the second back-up block (8), described second back-up block (8) bottom is provided with longitudinal pressing bar (9), many horizontal pressing bars (6) are evenly provided with between longitudinal pressing bar (9) in the described left and right sides, described many horizontal pressing bars (6) are divided into some segments longitudinal pressing bar (9), lug boss (12) is provided with bottom described every a bit of longitudinal pressing bar.Pad pasting ball bonding pressing plate after a kind of QFN of the utility model, structure is simple, easy for installation, do not need to change processing technology, cost-saving, pressing better effects if, long service life, stability in use is good, and after can effectively solving QFN, pad pasting framework pin floats problem, and contributes to solving the disconnected and workability problem of ball bonding second point point.
Description
Technical field
The utility model relates to pad pasting ball bonding pressing plate after a kind of QFN, is mainly used in fixing metal lead frame, in ball bonding process, clamps working region, make metal lead wire frame smooth, belong to technical field of semiconductor encapsulation.
Background technology
In the ball bonding operation production process of semiconductor packages, if ball bonding pressing plate is inadequate to the pressing of pad pasting framework after QFN, the pin of framework can be caused to produce slight fluctuation, thus affect the workability of the second solder joint in operation process, there are rosin joint, second point pin to print bad and cannot the good defect such as automated job.
Current encapsulation factory is the pad pasting framework method that pin floats in ball bonding process after process QFN, is mainly made into latticed by the window of ball bonding pressing plate, makes three row and window form to increase its pressing total area (see Fig. 1).But adopt three row window grid type ball bonding pressing plate be used in QFN after pad pasting framework production process in have following shortcoming:
1, the vertical element in its ball bonding pressing plate window is thinner, easy temperature distortion under the effect of board temperature cycles for a long time, thus affects overall pressing, even causes pressing point unstable and weighs framework wounded;
2, have the phenomenon that framework stains (load glue, chip relic etc.) in process of production unavoidably, the pressing bar of three row ball bonding pressing plates can be caused to damage or distortion, thus affect pressing effect;
3, the support of three row grid type ball bonding pressing plates is few, and cannot carry out the adjustment of pressing for framework out-of-flatness (pressing of unit the right and left is unstable), the life-span is shorter;
4, three row grid type ball bonding pressing plate vertical elements are more, and processing technology is more loaded down with trivial details, and processing cost is higher.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides pad pasting ball bonding pressing plate after a kind of QFN, it can provide steadily for pad pasting shell frame products after QFN in ball bonding process, safety, convenience and automated production ability.
The purpose of this utility model is achieved in that pad pasting ball bonding pressing plate after a kind of QFN, it comprises pressing plate body, described pressing plate body central offers pressing window, extended obliquely bottom the described pressing window left and right sides have the second back-up block, described second back-up block is positioned at pressing window inner side, longitudinal pressing bar is provided with bottom described second back-up block, many horizontal pressing bars are evenly provided with between the longitudinal pressing bar in the described left and right sides, described many horizontal pressing bars are divided into some segments longitudinal pressing bar, lug boss is provided with bottom described every a bit of longitudinal pressing bar, the height of described lug boss is 0.015 ~ 0.02mm.
Described pressing window side is provided with air-vent.
Compared with prior art, the utility model has following beneficial effect:
1, after the utility model can effectively solve QFN, pad pasting framework (an especially large product) pin floats problem, and contributes to solving the disconnected and workability problem of ball bonding second point point;
2, the utility model structure is simple, easy for installation, does not need to change processing technology, cost-saving.
3, compared with the pressing of existing ball bonding pressing plate, its pressing is tightr, and pressing better effects if, long service life, stability in use is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of current QFN tri-row grid type ball bonding pressing plate.
Fig. 2 is the structural representation of pad pasting ball bonding pressing plate after a kind of QFN of the utility model.
Fig. 3 is the transverse sectional view of Fig. 2.
Fig. 4 is the I portion enlarged drawing of Fig. 3.
Fig. 5 is the longitudinal sectional view of Fig. 2.
Fig. 6 is the working state schematic representation of pad pasting ball bonding pressing plate after a kind of QFN of the utility model.
Wherein:
Pressing plate body 1
Pressing window 5
Horizontal pressing bar 6
Air-vent 7
Second back-up block 8
Longitudinal pressing bar 9
Framework 10
Heat block 11
Lug boss 12.
Embodiment
See Fig. 2 ~ Fig. 6, pad pasting ball bonding pressing plate after a kind of QFN of the utility model, it comprises pressing plate body 1, described pressing plate body 1 center offers pressing window 5, extended obliquely bottom described pressing window 5 left and right sides have the second back-up block 8, described second back-up block 8 is positioned at inside pressing window 5, longitudinal pressing bar 9 is provided with bottom described second back-up block 8, many horizontal pressing bars 6 are evenly provided with between the longitudinal pressing bar 9 in the described left and right sides, described many horizontal pressing bars 6 are divided into some segments longitudinal pressing bar 9, lug boss 12 is provided with bottom described every a bit of longitudinal pressing bar, described lug boss 12 is highly 0.015 ~ 0.02mm, described pressing window 5 side is provided with air-vent 7.
Through overtesting, longitudinal pressing bar projection can be good at pressing the right and left, and top and the bottom are fixed by vertical element pressing, and the increase of back-up block volume extends to framework stitching surface and adds and changes single-row window pressing into, contributes to significantly promoting useful life.Embody rear pad pasting pressing effect better in actual tests process, more stable for second point bonding wire.
Claims (3)
1. pad pasting ball bonding pressing plate after a QFN, it is characterized in that: it comprises pressing plate body (1), described pressing plate body (1) center offers pressing window (5), extended obliquely bottom described pressing window (5) left and right sides have the second back-up block (8), described second back-up block (8) is positioned at pressing window (5) inner side, described second back-up block (8) bottom is provided with longitudinal pressing bar (9), many horizontal pressing bars (6) are evenly provided with between longitudinal pressing bar (9) in the described left and right sides, described many horizontal pressing bars (6) are divided into some segments longitudinal pressing bar (9), lug boss (12) is provided with bottom described every a bit of longitudinal pressing bar.
2. pad pasting ball bonding pressing plate after a kind of QFN according to claim 1, is characterized in that: described lug boss (12) is highly 0.015 ~ 0.02mm.
3. pad pasting ball bonding pressing plate after a kind of QFN according to claim 1, is characterized in that: described pressing window (5) side is provided with air-vent (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520253250.6U CN204596772U (en) | 2015-04-24 | 2015-04-24 | Pad pasting ball bonding pressing plate after a kind of QFN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520253250.6U CN204596772U (en) | 2015-04-24 | 2015-04-24 | Pad pasting ball bonding pressing plate after a kind of QFN |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204596772U true CN204596772U (en) | 2015-08-26 |
Family
ID=53932896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520253250.6U Withdrawn - After Issue CN204596772U (en) | 2015-04-24 | 2015-04-24 | Pad pasting ball bonding pressing plate after a kind of QFN |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204596772U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835772A (en) * | 2015-04-24 | 2015-08-12 | 江苏长电科技股份有限公司 | QFN rear pad pasting ball bonding pressure plate |
-
2015
- 2015-04-24 CN CN201520253250.6U patent/CN204596772U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835772A (en) * | 2015-04-24 | 2015-08-12 | 江苏长电科技股份有限公司 | QFN rear pad pasting ball bonding pressure plate |
| CN104835772B (en) * | 2015-04-24 | 2018-01-09 | 江苏长电科技股份有限公司 | Pad pasting ball bonding pressing plate after a kind of QFN |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150826 Effective date of abandoning: 20180109 |