| 摘要 |
PURPOSE:To equalize the operation of each transistor element by making the diameters of bonding wires at both end sections of a transistor element row smaller than that of a bonding wire at the central section of the transistor element row. CONSTITUTION:Bonding wires 3, 4 are stretched up to a lead electrode 6 for a stem through an electrode 5 for a capacitor chip from emitter electrodes 2 for transistor elements 7, 7A formed in a plurality of transistor chips 1 arranged in parallel. The diameters of the bonding wires 4 connected to the transistor elements 7A at both end sections are shaped in size smaller than those of the bonding wires 3 connected to the transistor elements 7 at a central section. Accordingly, the operation of the transistor elements is equalized, thus increasing an output and improving efficiency. |
