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
Motor device and method of manufacturing the same
Removable case
Serving base station selection based on backhaul capability
Testing SQL query writing skills
Sensor coating
Wireless monitoring in process applications
Vending machine
  Randomly Featured Patents
Negative pressure air bearing slider
Continuous batch seed coating system
Method and apparatus for direct buffering of a stream of variable-length data
Secure virtual community network system
Flash photographing system
System and method for controlling and monitoring a wireless roaming call
Patient interface
Fixed bed hydrocracking process
Method of editing a video program with variable view point of picked-up image and computer program product for displaying video program
Display method and apparatus for navigation system