Patent ID: 7759702

Claim:
A semiconductor device comprising: a substrate including a first portion having a <110> crystalline orientation and a second portion having a <100> crystalline orientation; a pnp hetero-junction bipolar transistor (HBT) disposed on the first portion of the substrate, the pnp HBT including: a collector disposed on the first portion of the substrate; a base disposed on the collector to form a hetero-junction therebetween; and an emitter disposed on the base to form a hetero-junction therebetween; and an npn hetero-junction bipolar transistor (HBT) disposed on the second portion of the substrate, the npn HBT including: a collector disposed on the second portion of the substrate; a base disposed on the collector to form a hetero-junction therebetween; and an emitter disposed on the base to form a hetero-junction therebetween.