Seyfarth Shaw LLP
Heterojunction bipolar transistor unit cell and power stage for a power amplifier
A heterojunction bipolar transistor unit cell may include a compound semiconductor substrate. The heterojunction bipolar transistor unity may also include a base mesa on the compound semiconductor substrate. The base mesa may include a collector region on the compound semiconductor substrate and a base region on the collector region. The heterojunction bipolar transistor unity may further include a single emitter mesa on the base mesa.
QUALCOMM Incorporated
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Bin Miguel Gengming Xia
Yang Miranda Corbalan Tao Li