Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method for reducing extrinsic base resistance and improving manufacturability in an NPN transistor










Image Number 6 for United States Patent #6830982.

According to one exemplary embodiment, an NPN bipolar transistor comprises a base layer situated over a collector, where the base layer comprises an intrinsic base region and an extrinsic base region. The NPN bipolar transistor may be, for example, an NPN silicon-germanium heterojunction bipolar transistor. The base layer can be, for example, silicon-germanium. According to this exemplary embodiment, the NPN bipolar transistor further comprises a cap layer situated over the base layer, where a portion of the cap layer is situated over the extrinsic base region, and where the portion of the cap layer situated over the extrinsic base region comprises an indium dopant. The cap layer may be, for example, polycrystalline silicon. According to this exemplary embodiment, the NPN bipolar transistor may further comprise an emitter situated over the intrinsic base region. The emitter may be, for example, polycrystalline silicon.








 
 
  Recently Added Patents
Piezoelectric device and fabricating method thereof
Circuits for prevention of reverse leakage in V.sub.th-cancellation charge pumps
Semiconductor integrated circuit
Vehicle driving assistance apparatus
Account managing device, image processing system, and storage medium
Authenticating messages sent between a vehicle and a central facility
Antibodies to Clostridium difficile toxins
  Randomly Featured Patents
Semiconductor integrated circuit device and method of manufacturing the same
Method and system for administering storage medium
Resistance heater assembly
Process for the control of the quality and of the production of transmission belts
Methods, systems and computer products for always-on dialtone incentive to purchase wireline telephone services
Power semiconductor device for suppressing substrate recirculation current and method of fabricating power semiconductor device
Plants and seeds of corn variety I291741
Framing jig and lifting apparatus
Retractable signage device
Semiconductor pressure sensor for sensing pressure applied thereto