Patent ID: 6101101
Filing Date: 2000-08-08
Classification: H01L

Abstract:
A lead frame for a semiconductor device including a chip having a bottom surface secured to said lead frame by silver epoxy, said semiconductor device being encapsulated by plastic resin, wherein a problem of delamination between said chip, said silver epoxy and said lead frame is substantially eliminated, said lead frame comprising:a chip paddle, said chip paddle having a central flat portion and substantially flat inclined plane extending from a perimeter of said flat portion of said chip paddle and forming a substantially closed contour therearound,said chip being bonded to said chip paddle by said silver epoxy disposed between said central flat portion of said chip paddle and a corresponding first portion of said bottom surface of said chip,said bottom surface of said chip having a second portion devoid of said silver epoxy surrounding said first portion thereof, said second portion extending beyond said chip paddle, andsaid plastic resin substantially completely filling a gap defined between said second portion of said bottom surface of said chip and said chip paddle.