Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Semiconductor device










Image Number 12 for United States Patent #6365925.

A semiconductor device that is easily operated with a single positive voltage supply and exhibits an excellent linearity of mutual conductance and source-gate capacitance with regard to a gate voltage is provided. The semiconductor device comprises a second barrier layer of AlGaAs, a channel layer of InGaAs and a first barrier layer of AlGaAs that are stacked in this order on a substrate of GaAs with a buffer layer of u-GaAs between the substrate and the second barrier layer. Carrier supply regions doped with n-type impurity are formed in part of the first and second barrier layers. A low resistivity region including a high concentration of p-type impurity (Zn) is formed in the first barrier layer. The low resistivity region is buried in a high resistivity region and brought to contact with a gate electrode. Upon an application of positive voltage to the gate electrode, a carrier deficient region disappears in the channel layer and no parasitic resistance component remains.








 
 
  Recently Added Patents
Supplier capability methods, systems, and apparatuses for extended commerce
Low power voltage controlled oscillator (VCO)
Image processing device and information storage medium including motion vector information calculation
Method and system for providing geohazard information to customers
Video editing apparatus
Processor micro-architecture for compute, save or restore multiple registers, devices, systems, methods and processes of manufacture
Capacity and coverage self-optimization method and device in a mobile network
  Randomly Featured Patents
Shrub rose plant named `Austop`
Carbonaceous fines in an oxygen-blown blast furnace
Downhole surge pressure reduction and filtering apparatus
Electronic thermometer decoder and display system
Positive-type photoresist composition
Method for fabricating thin film transistor
Image forming apparatus with improved capabilities for toner supply
Rim compositions using amino acid salt catalysts
Travelling precipitate collector
Method of molding a multi-colored article