Home » KnowledgeCenter » Shear tests » Passivation layer shear
As gold ball bonding geometries reduce, so too does the height of the ball bond. The thickness of the passivation layer though remains the same. This creates a problem when shear testing, because the thickness of passivation layer is greater than the shear height required to test the bond. Conventional shear testing then results in the shear tool “scalping” the top of the ball, low test forces and no measurement of the bond strength.
“Passivation shear” overcomes this problem by testing the bond with an appropriate shear height. After aligning the shear tool to the bond the tool lands on the substrate (passivation layer) in the normal manner. Instead of then lifting up to the required shear height it descends into the passivation layer. It then shears the ball bond. In so doing it shears through a small portion of the passivation layer. The force required to do this is much less than the ball bond strength and the peak force measurement remains that of the bond.
Local support and parts, global presence, world-class testers
J.F. Kennedylaan 14b5981 XC PanningenThe Netherlands
Schäferei 1806237 LeunaOT GünthersdorfGermany
72/7 M.12 Soi. SoonthornwipakBangpla, Bangphli,10540 Samut PrakanThailand
No. 157, Zhongzheng 6th St., Hukou Township, Hsinchu County 303, Taiwan (R.O.C.)
Room 2012 Haichuang Mansion, No.288 Dengyun Road, High-tech district, Kunshan, Jiang Su, China
Click to download thispage as PDF.
Follow us on:
© 2021 xyztec bv
Xyztec develops world-class bond testing technologies and works together with global partners to provide local support worldwide.
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.