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
Integrated emergency medical database system
Solid-state imaging device and electronic apparatus with antireflection structure
Crystalline solvates of 6-(piperidin-4-yloxy)-2H-isoquinolin-1-one hydrochloride
Guitar strap attachment means
Image forming apparatus having exhaust fan
Human renal disease marker substance
Reaction medium for detecting and/or identifying bacteria of the Legionella genus
  Randomly Featured Patents
Dihaloformaldoxime carbamates as antimicrobial agents
Panoramic optical system with very sharp beam control
Flow valve installation and removal apparatus
Pneumatic tire
Variable speed controller for air moving applications using an AC induction motor
Visor
Wood golf club head
Method and apparatus for accurately modeling digital signal processors
Device for suppressing discontinuous motion of a moving motor vehicle
Prevention of chlamydia infection using SIRNA