Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Field effect semiconductor device










Image Number 3 for United States Patent #5650642.

A field effect semiconductor device comprises a first channel layer composed of an undoped semiconductor in which electrons mainly drift in low-noise operation and a second channel layer composed of a semiconductor of one conductivity type in which electrons mainly drift in high-power operation, a third channel layer being provided in the second channel layer or on the second channel layer on the opposite side of the first channel layer. The third channel layer is constituted by at least one semiconductor layer of the one conductivity type or undoped having a greater electron affinity than that of the second channel layer and having a smaller forbidden bandgap than that of the second channel layer. In another field effect semiconductor device, an undoped impurity diffusion preventing layer having an electron affinity approximately equal to that of the second channel layer is provided between the first channel layer and the second channel layer.








 
 
  Recently Added Patents
Focus detection device and imaging apparatus having the same
Real-time demand prediction in a fast service restaurant environment
Methods and systems for assessing sales activity of a merchant
Method for eliciting an immune response to human telomerase reverse transcriptase
Treatment devices with deliver-activated inflatable members, and associated systems and methods for treating the spinal cord and other tissues
Switchable memory diodes based on ferroelectric/conjugated polymer heterostructures and/or their composites
Pre-primed roofing membrane
  Randomly Featured Patents
Stain-resistant plasticizer compositions and method of making same
Ventilated photovoltaic module frame
Process for multiple stage direct electrowinning of copper
Repair pressure applicator
Delay circuit and semiconductor memory device including the same
User wearable personal/medical information device
Method for the treatment of tap water and drinking water
Concentrical slot telecommunications equipment enclosure
Optical modulator element and image forming apparatus
Electrode-containing device with capillary transport between electrodes