| 摘要 |
PURPOSE:To improve workability and yield by separately forming a sprocket hole for feeding a tape and another one for mounting of two kinds in sprocket holes. CONSTITUTION:With a tape-carrier system lead-frame, sprocket holes 2 for feeding a tape and sprocket holes 6 for mounting are formed separately on both sides of a tape-shaped insulating film 1 made of polyimide, etc. Accordingly, defective positioning on mounting due to the damage of the sprocket holes can be removed completely, and the facility of work and yield can be improved. |
