| 摘要 |
PURPOSE:To obtain leads of large width nucessary for automatic wire connection, although lead space is narrow, as far as circumstances allow, on a lead frame for LSI equipped with numerous leads. CONSTITUTION:Tab 1, for pellet connection lead 2 connected to each other on its top part 3 surrounding the tab and formed in a terminal lead except for the connection part, and frame 4 are fabricated by pressing a metal sheet. Next, a cut edge is sized up and sheared from the top part 3 by means of punch and die corresponding to the top width of each lead. Then each lead is formed with every other lead slightoy bent, at the middle part 5 of its length, upward on the plane of the frame. Under this constitution, the incidence of short-circuit is reduced during assembly process handling or resin sealing. In addition, it is easy to provide the press die and to maintain thereof. |
