Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame – With stress relief
Patent
1990-09-24
1993-07-13
James, Andrew J.
Active solid-state devices (e.g., transistors, solid-state diode
Lead frame
With stress relief
257666, 257671, H01L 2348, H01L 2944, H01L 2952, H01L 2960
Patent
active
052276619
ABSTRACT:
A lead over chip packaged device that is less prone to package cracking during surface mounting is disclosed. The lead over chip lead frame overlies the active face of a semiconductor circuit. The backside of the semiconductor circuit is covered with an aminopropyltriethoxysilane coating. The aminopropyltriethoxysilane coating promotes adhesion between the backside of the semiconductor circuit and the mold compound used to encapsulate the device. This reduces package cracking resulting from delamination between the inactive face of the chip and the mold compound during reflow solder.
REFERENCES:
patent: 4395527 (1983-07-01), Berger
patent: 4477828 (1984-10-01), Scherer
patent: 4480009 (1984-10-01), Berger
patent: 4499149 (1985-02-01), Berger
patent: 4862245 (1989-08-01), Pashby et al.
patent: 4916519 (1990-04-01), Ward
Barndt B. Peter
Donaldson Richard L.
Holland Robby T.
James Andrew J.
Jr. Carl Whitehead
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