| 摘要 |
A lead of a lead frame cannot be made close to a very small semiconductor chip in view of processing dimensions. If a TAB technique is used to directly connect the semiconductor chip and the lead in order to improve in reliability, a device for forming a bump on an electrode of the chip is required, which increases the cost of investment in equipment. A printed circuit board (33) is formed between the lead (34) and bed (31) and a bonding wire (37) is used to shorten the length of wiring and thus to decrease in cost and improve in reliability. Since an electrode pad (35) of the semiconductor chip (32), the printed circuit board (33), and the lead (34) are connected to each other using the TAB technique, the productivity of semiconductor devices is increased. Using the TAB technique, no bumps are formed anywhere and the cost of investment in equipment is not so increased. |
