Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame
Patent
1995-05-10
1997-06-10
Whitehead, Carl W.
Active solid-state devices (e.g., transistors, solid-state diode
Lead frame
257669, 257670, 257671, 257674, H01L 23495
Patent
active
056379145
ABSTRACT:
A lead frame for use with a plastic encapsulated semiconductor device includes a tab on which the semiconductor chip is mounted, chip pad supporting leads, inner leads to be electrically coupled with the semiconductor chip, outer leads formed in a monoblock structure together with the inner leads, and a frame for supporting the chip pad supporting leads and outer leads. In the lead frame, there is disposed a dam member only between the outer leads. Alternatively, dummy outer leads are formed between the frame and leads adjacent thereto so as to connect the dummy leads to the outer leads by the dam member. The frame is removed after the semiconductor device is assembled.
REFERENCES:
patent: 4899207 (1990-02-01), Hallowell et al.
patent: 5176366 (1993-01-01), Masumoto et al.
patent: 5281851 (1994-01-01), Mills et al.
patent: 5336927 (1994-08-01), Suetake
Kitano Makoto
Kumazawa Tetsuo
Nagata Tatsuya
Nakamura Atsushi
Suzuki Hiromichi
Hitachi , Ltd.
Whitehead Carl W.
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