| 摘要 |
PROBLEM TO BE SOLVED: To improve the heat radiative property of the operation region of a bipolar transistor, to reduce heat resistance and to provide the efficient bipolar transistor with high output. SOLUTION: The other end of an emitter air bridge 4 which is thermally and electrically connected to an emitter electrode 7 is connected to an emitter wiring 1 on a semi-insulation substrate 11. The emitter wiring 1 is pulled out from the lower part of the other wirings such as a base wirings 2 and a collector wiring 3, for example, without electric contact, and it is provided in a large area detached from the operation region. Thus, heat generated in a device can considerably efficiently be set free to a substrate 11-side and heat resistance can be reduced with such structure. |
