Elimination of Non-stick on Leads Defect through Re-designed WCTP
Richard G. Mariano, Alyssa Grace S. Gablan, Frederick Ray I. Gomez
Journal of Engineering Research and Reports · pp. 22–26 · Published 17 Jul 2021
10.9734/jerr/2021/v20i1017385Abstract
This paper presents the reformation and fabrication resolved on the wire clamp and top plate (WCTP) design to eliminate the presence of lead finger bouncing resulting to high rejection of non-stick on leads (NSOL). Problem experienced was that the hollow or half-etched portion of the leadframe at the top and bottom units caused its bouncing effect. With the aim to improve localized massive NSOL defect, WCTP has been modified to provide positive bias to support its hollow part or the half-etched part of the leadframe at the top and bottom of the units. The re-designed WCTP was fabricated, extending its clamping with enhanced vacuum on top and bottom rows. The implementation of the improved WCTP design reduced the defect with 88 % improvement with the defect reduction during the lot runs.
Cited by 2
Behra E. Bamba, Frederick Ray I. Gomez, Jane Wanzel E. Rillera · 2023 IEEE 25th Electronics Packaging Technology Conference (EPTC) · 2023
Behra E. Bamba, Michael B. Tabiera, Frederick Ray I. Gomez · 2024 IEEE 26th Electronics Packaging Technology Conference (EPTC) · 2024
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