Low-Cost Complementary BiCMOS Integration Scheme

摘要

A bipolar complementary-metal-oxide-semiconductor (BiCMOS) device is disclosed. The BiCMOS device includes a CMOS device in a CMOS region, a first CMOS well in the CMOS region, an NPN bipolar device in a bipolar region, a second CMOS well in the bipolar region, the second CMOS well being a collector sinker and being electrically connected to a sub-collector of the NPN bipolar device, where the first CMOS well in the CMOS region and the second CMOS well in the bipolar region form a p-n junction to provide electrical isolation between the CMOS device and the NPN bipolar device. The BiCMOS device further includes a PNP bipolar device having a sub-collector, the sub-collector of the PNP bipolar device being electrically connected to a third CMOS well.