焊线原理介绍.ppt

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1、什麼是WIREBONDL/FDIE鋁墊銲金線一.W/B銲線基本理論:二.BONDING(固態銲接)的四大基本要素:要如何才能得到最佳的銲接，主要要素如下A.壓力。(BONDFORCE)B.振盪功率。(BONDPOWER)C.銲接時間。(BONDTIME)D.銲接溫度。(TEMPERATURE)1.目前我們電子產品銲接是採用固態銲接，所謂固態銲接，就是金屬在未達熔解溫度下之銲接。決定固態銲接的要素有那些？1.鋁墊之構造:a.最上層為少量水氣與雜質b.第二層為氧化鋁c.第三層才是純鋁d.第四層是二氧化鋁e.最下層就是矽層2.最佳之銲接，就是金球

2、與純鋁密切結合。故如何運用四大基本要素，掌控最佳配合時機為學習要旨。如壓力、振盪過大會造成缺鋁或矽崩過小昨則無法有效排除第一、二層與純鋁層作密切接合銲接。三.金球與鋁墊之最佳銲接:溫度溫度金球二氧化矽層矽層純鋁玻璃層水氣及雜質氧化鋁壓力(FORCE)振盪(POWER)金球與鋁墊的銲接模式鋁墊SEM側視圖BONDING時銲針位置之時序圖RESET位置LOOPHEIGHTTORESET加速度REVERSELOOP留線尾燒一個金球等速度逆打等速度1STBONDTIMEKINKHEIGHT2NDBONDTIME銲針高度TIME時間L/FDIE鋁墊銲

3、金線*WIREBOND*padleadFreeairballiscapturedinthechamferFreeairballiscapturedinthechamferpadleadFreeairballiscapturedinthechamferpadleadFreeairballiscapturedinthechamferpadleadFreeairballiscapturedinthechamferpadleadFormationofafirstbondpadleadFormationofafirstbondpadlead

4、FormationofafirstbondpadleadheatPRESSUREUltrasonicVibrationFormationofafirstbondpadleadUltraSonicVibrationheatPRESSURECapillaryrisestoloopheightpositionpadleadCapillaryrisestoloopheightpositionpadleadCapillaryrisestoloopheightpositionpadleadCapillaryrisestoloopheightpo

5、sitionpadleadCapillaryrisestoloopheightpositionpadleadFormationofalooppadleadFormationofalooppadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadpadleadFormationofasecondbondpadleadheatFormationofasecondbondpadle

6、adheatheatpadleadheatheatpadleadheatheatpadleadpadleadpadleadpadleadpadleadpadleadpadleadDisconnectionofthetailpadleadDisconnectionofthetailpadleadFormationofanewfreeairballWireBondedpadleadDie