Electronic device and lead frame used thereon

Details Electronic device and lead frame used thereon Electronic device and lead frame used thereon

1986-05-22

1988-02-16

Grimley, Anthony T.

Electricity: conductors and insulators

Boxes and housings

Hermetic sealed envelope type

357 70, H01L 2312

Patent

active

047256923

ABSTRACT:
An electronic device having a first type of external leads with a mechanical strength enhanced therefor and a second type of external leads smaller in a mechanical strength as compared with that of the first type of external leads. The mechanical strength of the first type of external leads is enhanced by making a width or a diameter of the first type of external leads larger than the width or the diameter of the second type of external leads, and the first type of external leads are disposed near edge portions or corner portions of the electronic device having a rectangular sealing means. Then the second type of external leads are disposed between the first type of external leads.

REFERENCES:
patent: 4084312 (1978-04-01), Kirk et al.
patent: 4338621 (1982-07-01), Braun
patent: 4482781 (1984-11-01), Burns
patent: 4532538 (1985-07-01), Wurz
patent: 4598307 (1986-07-01), Wakabayashi et al.
patent: 4627678 (1986-12-01), Biswas
"Current Applications for Miniature and Multi-pin LSI Packages", Jun. 4, 1984, pp. 141-152, Nikkei Electronics, McGraw Hill Inc., translation found in Serial #865,979.

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