| 摘要 |
PURPOSE:To improve the yield of a lead frame material by extending at the one ends of lead patterns in the amount of 1/2 of a lead pitch so that the tabs of the adjacent lead patterns of every other lead patterns are disposed in the same row and contracting the other ends of the lead patterns. CONSTITUTION:The outer leads 10 of a lead pattern 1 are so arranged as to be engaged with the outer leads 10 of the adjacent lead patterns 1 to be displaced toward the width of the lead frame by 1/2 of a lead pitch a with each other, to dispose the adjacent tabs on the same row, one ends of the inner leads 9 of every other lead patterns extend by a/2, and the other ends of the inner leads are contracted by a/2. In this manner, the yield of the lead frame material can be improved and since the tabs are aligned in one row along the longitudinal direction, the automation of bonding the pellets can be simplified. |
