| 摘要 |
PURPOSE:To obtain the excellent characteristics for a chip when a large current is applied by a method wherein a flat wire is joined together in the direction of thickness and the strength and junction area of the chip are increased. CONSTITUTION:A supersonic junction is performed on an Al-Si metal wire having rectangular section and other metal wires 11e and 11b. A wire and an electrode have a flat surface, they have a large contact area and they have also a strong adhesive strength. According to this constitution, an emitter electrode can be replaced with a flat wire, for example, working hours can be reduced, and the percentage of rejects and the percentage of troubles in a long lifetime test can also be reduced. |
