Patent ID: 6307253
Filing Date: 2001-10-23
Classification: H01L,Y10T

Abstract:
A lead frame comprising:a first elongated side frame;a second elongated side frame extending in parallel to the first elongated side frame;section bars connecting the first side frame and the second side frame at predetermined intervals for allowing the first side frame and the second side frame to be shifted relative to each other longitudinally thereof;a plurality of first lead terminals arranged at predetermined intervals and extending from the first side frame toward the second side frame, each first lead terminal including a base portion and an enlarged semiconductor-mounting free end portion; anda plurality of second lead terminals arranged in corresponding relationship to the plurality of first lead terminals and extending from the second side frame toward the first side frame, each second lead terminal including a base portion and a free end portion, the free end portion of each said second lead overlapping the free end portion of a corresponding first lead terminal when the first side frame and the second side frame are shifted relative to each other longitudinally thereof;wherein each said first lead terminal includes a weakening neck portion between the base portion and the free end portion of each said first lead terminal, the weakening neck portion being narrower than the base portion and the free end portion of each said first lead terminal.