Method for manufacture of aluminum-coated lead frame

Details Method for manufacture of aluminum-coated lead frame Method for manufacture of aluminum-coated lead frame

1985-08-26

1986-08-05

Pianalto, Bernard D.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 38, 427 91, 427 99, 427282, 427287, B05D 306

Patent

active

046042911

ABSTRACT:
A lead frame with an Al coating which enjoys satisfactory tightness of adhesion and sufficiently low hardness is manufactured by a method, comprising the steps of covering the lead frame with a mask sheet possessing an opening for exposing an inner lead part of the lead frame, keeping the lead frame at a temperature in the range of 100.degree. to 240.degree. C. under a high degree of vacuum exceeding the level of 10.sup.-5 Torr, and depositing aluminum on the inner lead part by arc-discharge type ion plating.

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