Resources Contact Us Home
Method for manufacturing power switching devices

Image Number 6 for United States Patent #4370180.

A method for manufacturing power switching devices such as thyristors and power transistors comprising the steps of forming impurity diffused layers of one conductivity type and of the opposite conductivity type in a semiconductor substrate of one conductivity type; forming a film containing phosphorus on the substrate; diffusing lifetime killer atoms into the substrate; and forming electrodes on the substrate.

  Recently Added Patents
Proximity sensor arrangement in a mobile device
Catalyst and process of hydrocarbon feedstock reformation to hydrogen and carbon monoxide
Semiconductor device and method for fabricating the same
Generalized AC-DC synchronous rectification techniques for single- and multi-phase systems
Herbicide composition having improved effectiveness, method of preparation and use
Compact light shield for flash photography
Agent for expelling parasites in humans, animals or birds
  Randomly Featured Patents
Manual motion simulator with resistance and video
Draft tell-tale for fired furnaces
Method for offset voltage trim for automatic gain controls
Granular detergent composition including soap noodles that contain free fatty acid to improve dissolution
Sports shoe having movable ground engaging elements
Reading devices and assay devices for use therewith
Saw blade
Applicator assembly for a cosmetic product
Integrated circuit package system including shield
Method and system for reducing transfer latency when transferring data from a network to a computer system