Semiconductor lead frame with channel beam tie bar

摘要

The invention is a lead frame (30) with tie bars (32-35) having reenforcing channels (44, 53, 64) extending at least a portion of the length of the tie bar. The lead frame (30) and channels (44, 53, 64) in the tie bars (32-35) may be formed either by stamping or by chemical etching. Each channel tie bar has at least two parts (51,52) forming a channel, the parts extending from each other at an angle less than 180 DEG .