Electricity: conductors and insulators – Boxes and housings – Hermetic sealed envelope type
Patent
1983-05-25
1988-03-22
Grimley, Arthur T.
Electricity: conductors and insulators
Boxes and housings
Hermetic sealed envelope type
357 70, 26427217, 264276, 361421, H01L 2348
Patent
active
047330147
ABSTRACT:
A lead frame for applying micro-electronic elements thereon, which lead frame comprises a series of lead patterns disposed at mutually equal pitch distances, each consisting of a carrier plate lying on the axis of the frame for applying a micro-electronic element thereto, further of leads terminating a short distance from said carrier plate, said leads being connected to lands extending perpendicularly to the frame axis and disposed on either side of the carrier plate, said leads extending beyond said lands in mutually parallel relationship so as to form lead terminals, as far as the next land of the adjoining lead pattern and being connected thereto, while the parallel leads of adjoining patterns are shifted relatively to each other in transverse direction: the mutual distance between two lands associated with one lead pattern is equal to the width of the standardized resin envelope of the micro-electronic element, the lands being provided with cuts in a direction approximately parallel to the axis of the lead frame, said cuts extending form the land edge oriented towards the carrier plate and terminating a short distance from the opposite land edge.
REFERENCES:
patent: 4490902 (1985-01-01), Eytcheson et al.
De Kler Dirk
Fierkens Richardus H.
ASM-Fico Tooling B.V.
Grimley Arthur T.
Tone David A.
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