CN105632988A - Chip welding positioning tooling - Google Patents
Chip welding positioning tooling Download PDFInfo
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- CN105632988A CN105632988A CN201410625225.6A CN201410625225A CN105632988A CN 105632988 A CN105632988 A CN 105632988A CN 201410625225 A CN201410625225 A CN 201410625225A CN 105632988 A CN105632988 A CN 105632988A
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- chip
- resilient piece
- location resilient
- positioning tool
- welding
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Abstract
A chip welding positioning tooling disclosed by the present invention comprises a pedestal and a positioning part, the positioning part comprises a positioning frame and a positioning spring leaf, and the positioning spring leaf is fixed by the cylindrical fixing strips at the two ends of the positioning spring leaf. The positioning frame is a polygon, and each edge of the positioning frame is equipped with two grooves protruded outwards. The distance between the two grooves on the same edge is less than the length of the positioning spring leaf, and the grooves are used to fix the fixing strips at the two ends of the positioning spring leaf. The chip welding positioning tooling of the present invention changes the contact of a tooling and a chip into the elastic contact, after being contacted, the tooling and the chip can be separated via a tool, and the chip is not damaged.
Description
Technical field
The invention belongs to electronic manufacturing field, particularly to a kind of dismounting time not easy damaged chip chip welding positioning tool.
Background technology
IGBT (InsulatedGateBipolarTransistor), insulated gate bipolar transistor, it is by BJT (BipolarJunctionTransistor, bipolar junction transistor) and MOS (metaloxidesemiconductor, insulating gate type field effect tube) the compound full-control type voltage driven type power semiconductor that forms, have MOSFET (Metal-Oxide-SemiconductorField-EffectTransistor concurrently, metal-oxide half field effect transistor) high input impedance and GTR (GiantTransistor, huge transistor) the advantage of low conduction voltage drop two aspect. modern power electronics technology obtains and is increasingly widely applied, in the big or middle power of upper frequency is applied, occupy leading position.
After IGBT module has encapsulated, the overall performance of module is by chip controls, so after IGBT module encapsulated, the quality of chip has influence on the performance of module. Wherein chip welding is to have the technique directly contacted with chip, so the inefficacy after chip welding have also been obtained increasing attention, and the inefficacy after welding is irreversible. Chip welding is to be welded on chip and solder by frock to cover on copper ceramic substrate. Except welding procedure, the quality of welding tooling directly influences the inefficacy after the welding of chip, even the reliability of module.
It is presently mainly employing tradition location mode, chip, weld tabs and DBC is placed in tool locating part, then welds. But, this location mode there is the problem that chip basis material is silicon, frangible; In welding process, after solder melts, chip can offset, and causes the hard contact between chip and positioning tool. After welding completes, chip and positioning tool are in close contact, it is necessary to use brute force to dismantle, cause chip cracks.
Therefore, it is necessary to design a kind of welding complete after, convenient disassembly and be not easy damage chip welding positioning tool.
Summary of the invention
Can there is the hard contact between chip and frock in original frock, but die drift inevitably occurs again in actual production after having welded, and causes contact. Based on this reason, frock and chip contacting portion are become Elastic Contact by us, even if there occurs that chip and frock can also be easily separated by contact by instrument, and will not damage chip.
A kind of chip welding positioning tool, including base and positioning element, it is characterised in that: described positioning element includes posting and Location resilient piece; Described Location resilient piece two ends adopt the fixed strip of column to be fixed by Location resilient piece; Described posting is a polygon, each limit of described posting all arranges the groove of two outwardly convexs, and the distance between two grooves on same limit is less than the length of described Location resilient piece, described groove is for fixing the fixed strip at described Location resilient piece two ends.
Preferably, described Location resilient piece adopts elastic force steel disc less, that elastic characteristic will not change under welding high temperature.
Preferably, the fixed strip at described Location resilient piece two ends is preferably cylindric, and the groove shapes on described posting is consistent with described fixed strip shape.
Preferably, the fixed strip at described Location resilient piece two ends is that iron prop or directly directly rolled by described fixation spring tab two ends forms.
Preferably, described Location resilient piece middle body adopts the material that hardness is bigger compared with both sides, and when Location resilient piece is bent, middle body remains straight.
Compared with prior art, beneficial effects of the present invention: the part that this chip welding positioning tool directly contacts with chip adopts has certain elastic material, difference with tradition positioning tool in weld after need brute force dismounting positioning tool separate mode, only need to use specific purpose tool to make elastic material compress further, and then make the part that supports that chip directly contacts with fixing tool produce gap and be separated, position the dismounting of frock in this case, it is possible to avoid the damage of chip; Simultaneously when welding, owing to elastomeric material is extruded by chip, chip can be securely fixed by its counteracting force.
Accompanying drawing explanation
In order to the technical scheme in the embodiment of the present invention is more clearly described, the accompanying drawing used required in embodiment will be introduced simply below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the front view of traditional die positioning tool;
Fig. 2 is the side view of traditional die positioning tool;
Fig. 3 is traditional die positioning tool chip positioning schematic diagram;
Fig. 4 is the front view of Location resilient piece in the preferred embodiment for the present invention;
Fig. 5 is the side view of Location resilient piece in the preferred embodiment for the present invention;
Fig. 6 is the front view of posting in the preferred embodiment for the present invention;
Fig. 7 is preferred embodiment for the present invention chips welding positioning tool assembling figure;
Fig. 8 is the schematic diagram of chip positioning in preferred embodiment for the present invention chips welding positioning tool;
Fig. 9 is preferred embodiment for the present invention chips welding positioning tool inner position shell fragment resilience schematic diagram.
Wherein:
1, base; 2, posting; 3, Location resilient piece; 31, fixed strip;
4, groove; 5, chip.
Detailed description of the invention
It is presently mainly employing tradition location mode as shown in Figure 1 to Figure 3, chip, weld tabs and DBC is placed in tool locating part, then welds. And chip basis material is silicon, frangible. In welding process, after solder melts, chip can offset, and causes the hard contact between chip and positioning tool. After welding completes, chip and positioning tool are in close contact, it is necessary to use brute force to dismantle, cause chip cracks.
The present invention is directed to deficiency of the prior art, it is provided that a kind of chip welding positioning tool, this positioning tool and chip contacting portion adopt Elastic Contact, even if there occurs that chip and frock can also be easily separated by contact by instrument, and will not damage chip.
Following by detailed description of the invention, technical scheme is clearly and completely described. Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
According to a kind of chip welding positioning tool not needing to remove by brute force that the purpose of the present invention proposes. As shown in Fig. 4 to Fig. 8, the chip welding positioning tool in the embodiment of the present invention, including base 1 and positioning element. Wherein, positioning element includes posting 2 and Location resilient piece 3. This Location resilient piece 3 introduces elastic part, it is preferable that this elastic part uses the steel disc that elastic force is less, so both can ensure that elasticity, it is also ensured that under welding high temperature, the characteristic of elastic part will not change. The two ends of Location resilient piece 3 adopt the fixed strip 31 of column to be fixed by Location resilient piece 3, it is preferable that the fixed strip 31 at Location resilient piece 3 two ends is preferably columned iron prop, it is simple to in the above-mentioned posting 2 of arbitrarily angled insertion. As another embodiment of the invention, this fixed strip 31 can directly be rolled by the two ends of described fixation spring tab 3 and form, and is similarly formed cylindric, it is simple to in the above-mentioned posting 2 of arbitrarily angled insertion.
As shown in Figure 6, above-mentioned posting 2 is a polygon, can determine the shape of posting 2 according to the shape of chip, owing to chip mostly is square, is therefore preferably square posting 2 in the embodiment of the present invention. As shown in Figure 6, each limit of above-mentioned posting 2 all arranges the groove 4 of two outwardly convexs, groove 4 is for fixing the fixed strip 31 at described Location resilient piece 3 two ends, and the distance between two grooves 4 on same limit is less than the length of described Location resilient piece 3, elastic part so can be made to have certain bending, then elastic part is installed in frock, as shown in Figure 7, ensure that it is elastic for allowing this positioning tool and chip 5 contact portion, rather than hard contact. After being completed by positioning tool, chip 5 is put into frock, as shown in Figure 8.
Another preferred implementation as the present invention, owing to the edge of chip 5 is general comparatively smooth, therefore the middle body of Location resilient piece 3 can adopt the material that hardness is bigger compared with both sides, when Location resilient piece 3 is bent, middle body remains straight, i.e. two lateral bends of Location resilient piece 3, middle keep plane with the contact area increasing between Location resilient piece 3 and chip 5, better fit chip 5, as long as ensureing that elastic part has the space can resilience.
After chip has welded, it is necessary to positioning tool and chip are easily separated. When running into the situation of chip and frock close contact, original frock needs brute force makes chip separate with frock, after dismounting completes, causes chip damaged; But the chip welding positioning tool in the present invention is under chip and frock close contact situation, it is possible to elastic part uses instrument carry out resilience, makes chip and frock Elastic Contact part be easily separated, then dismantle, thus avoiding wafer damage. Elastic part resilience schematic diagram is as shown in Figure 9.
Compared with prior art, the invention have the advantages that
(1) part that this chip welding positioning tool directly contacts with chip adopts and has certain elastic material, difference with tradition positioning tool in weld after need brute force dismounting positioning tool separate mode, only need to use specific purpose tool to make the further resilience of elastic material, and then make the part that supports that chip directly contacts with fixing tool produce gap and be separated, position the dismounting of frock in this case, it is possible to avoid the damage of chip.
(2) simultaneously when welding, owing to elastomeric material is extruded by chip, chip can be securely fixed by its counteracting force.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when without departing substantially from the spirit of the present invention or basic feature, it is possible to realize the present invention in other specific forms. Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the invention rather than described above limits, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in the present invention. Any accompanying drawing labelling in claim should be considered as the claim that restriction is involved.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, and the technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.
Claims (5)
1. a chip welding positioning tool, including base and positioning element, it is characterised in that: described positioning element includes posting and Location resilient piece; Described Location resilient piece two ends adopt the fixed strip of column to be fixed by Location resilient piece; Described posting is a polygon, each limit of described posting all arranges the groove of two outwardly convexs, and the distance between two grooves on same limit is less than the length of described Location resilient piece, described groove is for fixing the fixed strip at described Location resilient piece two ends.
2. chip according to claim 1 welding positioning tool, it is characterised in that: described Location resilient piece adopts elastic force steel disc less, that elastic characteristic will not change under welding high temperature.
3. chip according to claim 1 welding positioning tool, it is characterised in that: the fixed strip at described Location resilient piece two ends is preferably cylindric, and the groove shapes on described posting is consistent with described fixed strip shape.
4. chip according to claim 1 welding positioning tool, it is characterised in that: the fixed strip at described Location resilient piece two ends is that iron prop or directly directly rolled by described fixation spring tab two ends forms.
5. chip according to claim 1 welding positioning tool, it is characterised in that: described Location resilient piece middle body adopts the material that hardness is bigger compared with both sides, and when Location resilient piece is bent, middle body remains straight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410625225.6A CN105632988A (en) | 2014-11-07 | 2014-11-07 | Chip welding positioning tooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410625225.6A CN105632988A (en) | 2014-11-07 | 2014-11-07 | Chip welding positioning tooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105632988A true CN105632988A (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410625225.6A Pending CN105632988A (en) | 2014-11-07 | 2014-11-07 | Chip welding positioning tooling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105632988A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192448A (en) * | 2010-12-30 | 2011-09-21 | 友达光电股份有限公司 | Backlight module |
| CN202495587U (en) * | 2012-02-16 | 2012-10-17 | 深圳市同洲电子股份有限公司 | Card holder for CA card |
| CN103177995A (en) * | 2013-02-21 | 2013-06-26 | 西安永电电气有限责任公司 | Positioning plate for one-off welding of IGBT (insulated gate bipolar transistor) |
| CN103567683A (en) * | 2012-07-18 | 2014-02-12 | 西安永电电气有限责任公司 | Positioning tool for chip welding |
-
2014
- 2014-11-07 CN CN201410625225.6A patent/CN105632988A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192448A (en) * | 2010-12-30 | 2011-09-21 | 友达光电股份有限公司 | Backlight module |
| CN202495587U (en) * | 2012-02-16 | 2012-10-17 | 深圳市同洲电子股份有限公司 | Card holder for CA card |
| CN103567683A (en) * | 2012-07-18 | 2014-02-12 | 西安永电电气有限责任公司 | Positioning tool for chip welding |
| CN103177995A (en) * | 2013-02-21 | 2013-06-26 | 西安永电电气有限责任公司 | Positioning plate for one-off welding of IGBT (insulated gate bipolar transistor) |
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Application publication date: 20160601 |
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