摘要:
A technology which allows a reduction in the thermal resistance of a semiconductor device used in a radio communication device, and the miniaturization thereof is provided. For example, the semiconductor device can include a plurality of unit transistors Q, transistor formation regions 3a, 3b, and 3e each having a first number (e.g., seven) of the unit transistors Q, and transistor formation regions 3c and 3d each having a second number (e.g., four) of the unit transistors Q. The transistor formation regions 3c and 3d are located between the transistor formation regions 3a, 3b, 3e, and 3f, and the first number is larger than the second number.
摘要:
A heterojunction bipolar transistor with InGaP as the emitter layer and capable of both reliable electrical conduction and thermal stability wherein a GaAs layer is inserted between the InGaP emitter layer and AlGaAs ballast resistance layer, to prevent holes reverse-injected from the base layer from diffusing and reaching the AlGaAs ballast resistance layer.