Resources Contact Us Home
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
Differentiated PSIP table update interval technology
Anti-phishing system and method
Developing device
Closed cell culture system
Stereoscopic display
Organic metal complex and its use in organic electroluminescent device
Systems and methods for adaptive blind mode equalization
  Randomly Featured Patents
Camera and method for controlling the same
Mirror with adjustment elements including bellows for a motor vehicle
Method and system for dynamic volume tracking in an installable file system
Conveyor belt
Hand-held power cue stick chalker and talcum powder dispenser
Infrastructure independent position determining system
Data transmission/receive system and control method using dummy data to signify transmission/reception state and to detect transmission error
TV receiver
Baking pan insulator