Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Diffused extrinsic base and method for fabrication










Image Number 15 for United States Patent #6869854.

The present invention provides a unique device structure and method that provides increased transistor performance in integrated bipolar circuit devices. The preferred embodiment of the present invention provides improved high speed performance by providing reduced base resistence. The preferred design forms the extrinsic base by diffusing dopants from a dopant source layer and into the extrinsic base region. This diffusion of dopants forms at least a portion of the extrinsic base. In particular, the portion adjacent to the intrinsic base region is formed by diffusion. This solution avoids the problems caused by traditional solutions that implanted the extrinsic base. Specifically, by forming at least a portion of the extrinsic base by diffusion, the problem of damage to base region is minimized. This reduced damage enhances dopant diffusion into the intrinsic base. Additionally, the formed extrinsic base can have improved resistence, resulting in an improved maximum frequency for the bipolar device. Additionally, the extrinsic base can be formed with a self-aligned manufacturing process that reduces fabrication complexity.








 
 
  Recently Added Patents
Converting machine
Establishing secure communication between an implantable medical device and an external device
Mobile communication terminal and data synchronization method
System and method for insertion and removal of video objects
Laundry caddy
Device management system, managed device, information providing method, and storage medium
Pressure gauge
  Randomly Featured Patents
Bank selection structures for a memory array, including a flat cell ROM array
Percussion drilling apparatus
Midstream urine specimen collection device
Spare tire installation structure
Convertible bag packing container and bag support device
Method for forming a microstructure
Network sales system
Antitheft system
Device for producing tactile-detectable warning surfaces and method for employing same
Travel alarm clock