Resources Contact Us Home
Semiconductor device

Image Number 15 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
Method and device for managing a turning setpoint applied to at least one turning actuator for the rear wheels of an automobile
Data security for dynamic random access memory using body bias to clear data at power-up
Encoder that detects positional information of a moving body generating interference fringes that move in opposite directions
Electrifying roller
Methods of fabricating semiconductor device
All-in-one information handling system
Enhanced telephony services
  Randomly Featured Patents
Wafer polishing apparatus
Semiconductor memory device
Muscle strengthening method and apparatus
Method and apparatus for improving end to end performance of a data network
Detecting cancerous conditions by assaying for telomerase activity
System and method for aircraft braking system usage monitoring
Hanger bracket and hook therefor
Semiconductor composite device, method for manufacturing the semiconductor composite device, LED head that employs the semiconductor composite device, and image forming apparatus that employs
Personalized annunciation signaling phone unit