High electron mobility transistor having improved electron...

Details High electron mobility transistor having improved electron... High electron mobility transistor having improved electron...

H - Electricity

01

L

H01L 29/778 (2006.01)

Patent

CA 2080081

First and second high-resistivity compound semiconductor channel layers are formed between an undoped compound semiconductor layer and a doped compound semiconductor layer having an electron affinity smaller than the undoped compound semiconductor layer. The first high-resistivity compound semiconductor channel layer is adjacent to the doped compound semiconductor layer, and has an electron affinity distribution that increases toward the undoped compound semiconductor layer. The second high-resistivity compound semiconductor channel layer is located between the first high- resistivity compound semiconductor channel layer and the undoped compound semiconductor layer, and has an electron affinity distribution that decreases toward the undoped compound semiconductor layer. A gate electrode and cap layers are formed on the doped compound semiconductor layer. Source and drain electrodes are formed on the respective cap layers.

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