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
Pipe coupling
Apparatus and method for efficient transmission of acknowledgements
Devices including composite thermal capacitors
Solar-powered roadway light
Method and apparatus for accessing coconut water
Sense-amplifier monotizer
Scanned image projection system employing intermediate image plane
  Randomly Featured Patents
Carbon dioxide rate of change for vehicle trunk safety
Electronic keyboard musical instrument
Euler vector for color images
Methods for forming barrier regions within regions of insulating material resulting in outgassing paths from the insulating material and related devices
Gear unit for combination with an auxiliary power consuming unit of a motor-vehicle
Cutting tool and method of use
Fluorescent lamp with glass tube and protective layer, method for producing the same, and lighting system
Table game having a curved playing surface
Process for elimination of waste material during manufacture of acrylonitrile
Woodworking vise