CN207282464U

CN207282464U - A kind of chopper device for chip and metal composite glass fibre carrier band

Info

Publication number: CN207282464U
Application number: CN201721059638.8U
Authority: CN
Inventors: 陈莹
Original assignee: Nuodeka (shanghai) Electronics Co Ltd
Current assignee: Nuodeka (shanghai) Electronics Co Ltd
Priority date: 2017-08-23
Filing date: 2017-08-23
Publication date: 2018-04-27
Anticipated expiration: 2027-08-23

Abstract

The utility model discloses a kind of chopper device for chip and metal composite glass fibre carrier band, including chopper, transducing bar and sparking bar；Chopper is integrally formed, and the top of chopper is cylinder, and bottom is cone, and the center of chopper offers a gold thread passage along the axial direction of chopper；Chopper is fixed on transducing bar by fixed screw；The head of sparking bar is directed toward the end of chopper.The utility model is fired by bar of striking sparks and forms gold goal by the gold thread of chopper gold thread passage, and continuous welding operation is realized by chopper cut-out gold thread again after chip-pad area is bonded；Chopper end sides and horizontal plane institute angle degree are adjusted to 8 degree so that thickened the solder joint fish tail after cutting off, ensure that bonding quality, it is possible to prevente effectively from equipment alarm caused by line tail tangent line is bad；Chopper end face forms graininess projection through polishing, can avoid that original chopper is easy to wear, needs to replace the shortcomings that just can guarantee that welding quality in the short time.

Description

A kind of chopper device for chip and metal composite glass fibre carrier band

Technical field

It the utility model is related to microelectronics Packaging field, and in particular to be used for chip and metal composite glass fibers for one kind Tie up the chopper device of carrier band.

Background technology

For smart card module manufacture, the most critical technique of usual module encapsulation is gold ball bonding, i.e., gold thread welds. According to technological requirement, module will be connected chip with carrier band by gold thread, be that chip can bear certain resistance to compression and turn round curved Normal operation under environment.

Metal composite glass fibre carrier band progressively substitutes original pure glass in the high end module encapsulation of smart card in this year Fiber is carried to reduce the cost of raw material.And the second solder joint of this new metal composite glass fibre carrier band butt welding wire material Bond quality bring challenges.It is hard to carry the quality of metal contact surface, general chopper design can not normal cutoff fish tail line, Cause the second solder joint combination power weak, module can not be tested by the mechanical external force of card rank, and failure mode is often with reference to point off Split.On the other hand common chopper serious wear in continuous production, not only aggravates the generation of bonding wire exception, more makes the use of chopper Service life declines.Problem above ultimately results in the percent defective increase of smart card module, causes a large amount of of product to scrap, serious shadow Product qualification rate and productivity have been rung, has added production cost.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided one kind is used for chip and metal composite glass The chopper device of glass fiber carrier band, it can make chopper tip more resistant while welding force is increased, and improve service life, Improve the yield rate and product quality of smart card module product.

Realizing a kind of technical solution of above-mentioned purpose is：A kind of chopper for chip and metal composite glass fibre carrier band Device, including chopper, transducing bar and sparking bar；

The chopper is integrally formed, and the top of the chopper is cylinder, and bottom is cone, the central edge of the chopper The axial direction for the chopper offers a gold thread passage；

The chopper is fixed on transducing bar by fixed screw；

The head of the sparking bar is directed toward the end of the chopper.

Further, the side of the end of the chopper and horizontal plane institute angle degree are 8 degree.

Further, there is the graininess bulge-structure formed by polishing on the end face of the end of the chopper.

A kind of chopper device for chip and metal composite glass fibre carrier band of the utility model, is burnt by bar of striking sparks System forms gold goal by the gold thread of chopper gold thread passage, is realized again by chopper cut-out gold thread after chip-pad area is bonded Continuous welding operation；Chopper end sides and horizontal plane institute angle degree are adjusted to 8 degree so that thickened the solder joint after cutting off Fish tail, ensure that bonding quality, it is possible to prevente effectively from equipment alarm caused by line tail tangent line is bad；Chopper end face is formed through polishing Graininess projection, can avoid that original chopper is easy to wear, needs to replace the shortcomings that just can guarantee that welding quality in the short time.This reality It is smoothed out with the production of the new a large amount of smart card module products that ensure that long-time, understatement and warn, lifts product qualification rate, drop Low production cost.

Brief description of the drawings

Fig. 1 is that a kind of structure of chopper device carried for chip with metal composite glass fibre of the utility model is shown It is intended to；

Fig. 2 is a kind of chopper for chip and the chopper device of metal composite glass fibre carrier band of the utility model Structure diagram；

Fig. 3 is a kind of chopper for chip and the chopper device of metal composite glass fibre carrier band of the utility model The structure diagram of end；

Fig. 4 is the solder joint fish tail schematic diagram after being welded using conventional gold thread welding with chopper；

Fig. 5 is to be carried out using a kind of of the utility model for chip and the chopper device that metal composite glass fibre carries Solder joint fish tail schematic diagram after welding.

Embodiment

In order to preferably understand the technical solution of the utility model, below by specifically embodiment and combine Attached drawing is described in detail：

Smart card module, after have passed through chip welding in the production line, next process is exactly to being welded on carrier band On chip and carrier band, the method with gold thread by welding, will be connected between chip and carrier band.Due to the tape base of flex tape Typically using made of glass fabric.This tape base is usually FR4, and the glass fibre epoxy cloth of G10 forms.This material The characteristics of be it is relatively soft have enough toughness, but cost of manufacture is high.With the increasingly fierceness of market competition, cost control is inevitable Trend.Common glass fibre carrier band, starts to be substituted by the lower metal composite glass fibre carrier band of cost.This kind carrier band Material is in the majority with metal ingredient, so harder.Original chopper is caused, occurs the bad alarm of bonding wire in batch production More, the short phenomenon of service life, has not been suitable for the production of such strip product.

Referring to Fig. 1, a kind of chopper device for chip and metal composite glass fibre carrier band of the utility model, bag Include chopper 1, transducing bar 2 and sparking bar 3.

Chopper 1 is fixed on transducing bar 2 by fixed screw 4, can be replaced.The transmission of transducing bar 2 and chopper device Mechanism connects, and chopper 1 can be driven to be in vertical motion, to complete cutting action.The head of sparking bar 3 is directed toward the end of chopper 1 Portion.

Referring to Fig. 2, chopper 1 is integrally formed, the top of chopper 1 is cylinder 11, and bottom is cone 12, chopper 1 Center offers a gold thread passage 13 along the axial direction of chopper 1, welding is passed through with gold thread from gold thread passage 13.

Needed during a kind of chopper device use carried for chip with metal composite glass fibre of the utility model Praetersonic vibrations and high temperature are subjected to, so the material of the chopper 1 is using ceramics.When the chopper device works, pass through sparking Bar 3, burns a gold goal by the bottom of the chopper 1 where gold thread, is then bonded in chip-pad area, is passing through welding Head, is moved to the welding region of carrier band, and bonding is completed by welding pressure and ultrasonic wave.Then, the sharp mouth of chopper 1 cuts gold thread It is disconnected.Referring to Fig. 3, the side of the end of chopper 1 and the angle (FA) of horizontal plane form fish tail, gold thread is completed to chip and carrier band Between connection, for ensure formed fish tail thickness, length, width it is moderate, FA angles are adjusted to 8 degree by original 4 degree.So both While ensure that product qualification rate, and reach optimal bonding quality.The gold thread head of disconnection carries out standard to burn ball in next step again It is standby, so as to fulfill continuous wire-bonding operations.

Referring to Fig. 4, conventional gold thread welding chopper, when completing tangent line on metal composite glass fibre carrier band, cuts Line angle degree is almost into 90 degree so that the thickness that fish tail 51 is formed is very thin.This causes the combination power of gold thread line tail small, easily occurs The undesirable alarm of bonding wire, and in the reliability test for weighing module quality quality, crash rate greatly improves.

Referring to Fig. 5, the chopper 1 of the use of the utility model, increases the angle that gold thread is formed with carrier band so that splitting During cutter head tangent line, tangential angle becomes flat mitigation, considerably increases the thickness of fish tail 52, there is gold thread and the combination power of carrier band Significantly improve.

There is the graininess bulge-structure formed by polishing on the end face of the end of chopper 1, make the welding of gold thread and carrier band Higher is spent, it is more preferable with reference to power.Coarse surface reduces the loss at 1 tip of chopper, so as to effectively improve the use longevity of chopper 1 Life, then improves Product jointing success rate and quality, reduces scrapping for product, saved production cost.

Those of ordinary skill in the art is it should be appreciated that the embodiment of the above is intended merely to illustrate that this practicality is new Type, and be not used as the restriction to the utility model, as long as in the spirit of the utility model, to the above Change, the modification of embodiment will all fall in the Claims scope of the utility model.

Claims

1. a kind of chopper device for chip and metal composite glass fibre carrier band, including chopper, transducing bar and sparking bar, It is characterized in that,

The chopper is integrally formed, and the top of the chopper is cylinder, and bottom is cone, and the center of the chopper is along institute The axial direction for stating chopper offers a gold thread passage；

The chopper is fixed on transducing bar by fixed screw；

The head of the sparking bar is directed toward the end of the chopper.

2. a kind of chopper device for chip and metal composite glass fibre carrier band according to claim 1, its feature It is, the side of the end of the chopper and horizontal plane institute angle degree are 8 degree.

3. a kind of chopper device for chip and metal composite glass fibre carrier band according to claim 1, its feature It is there is the graininess bulge-structure formed by polishing on the end face of the end of the chopper.