Resources Contact Us Home
Method for manufacturing power switching devices

Image Number 7 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
Acrylic pressure-sensitive adhesive composition, acrylic pressure-sensitive adhesive layer, and acrylic pressure-sensitive adhesive tape
Bi-directional, compact, multi-path and free space channel replicator
Information distribution system, information distributing method, node, and recording medium
Radiation protective garment with forced ventilation and method
Detection system and method for mobile device application
Electronic component, a semiconductor wafer and a method for producing an electronic component
Image capture apparatus and program
  Randomly Featured Patents
Articulated manipulation device
Method for double-side thermoforming
Steel cord for reinforcing rubber
Optical head and image forming apparatus incorporating the same
Viscosity index improvement in dewaxed lube basestock by partial desulfurization in hydrotreat bed
Self-actuating water containment barrier
Method of plugging up a taphole in a blast furnace
Apparatus and method for forming multi-colored yarn
Multi-segment photonic-crystal-rod waveguides coupled across a free-space gap and associated method