Journal of the Korean institute of surface engineering (한국표면공학회지)
- Volume 34 Issue 2
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- Pages.142-150
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- 2001
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- 1225-8024(pISSN)
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- 2288-8403(eISSN)
Analyses of Fracture Surfaces after Pull-out Test: Brown Oxide
Pull-out 시험 후의 표면분석 : 갈색산화물
Abstract
Due to naturally formed copper oxides, the adhesion strength between copper and epoxy resin is often very poor. To improve the adhesion strength between copper and epoxy resin, Cu-based leadframe sheets were oxidized in a brown-oxide forming solution. Then the effect of brown-oxide formation on the adhesion strength of leadframe to epoxy molding compound (EMC) was studied using pull-out specimens. After the pull-out test, fracture surfaces were analyzed using SEM, AES and EDS to determine failure path. The results showed that the failure path lay over inside the CuO and inside the EMC irrespective of the pull strength.
Keywords