What is the role of a buffer layer in high electron mobility transistor (HEMT)?

01 January 1970 1 8K Report

For example, I see HEMT structures such as AlGaN Barrier / GaN Channel / GaN Buffer. What is the role of a buffer layer? Is it primarily used for heat conduction (heat sink)?

Xing Wei

High quality channel and barrier layer;

High breakdown voltage.

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Science method

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