Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Power semiconductor rectifier with ring-shaped trenches










Image Number 8 for United States Patent #6670650.

A high-speed, soft-recovery semiconductor device that reduces leakage current by increasing the Schottky ratio of Schottky contacts to pn junctions. In one embodiment of the present invention, an n.sup.- drift layer is formed on an n.sup.+ cathode layer 1 by epitaxial growth, and ring-shaped ring trenches having a prescribed width are formed in the n.sup.- drift layer. Oxide films are formed on the side walls of each ring trench. The ring trenches are arranged such that the centers of the rings of the ring trenches adjacent to one another form a triangular lattice unit. A p.sup.- anode layer is formed at the bottom of each ring trench. Schottky contacts are formed at the interface between an anode electrode and the surface of the n.sup.- drift layer. Ohmic contact is established between the surfaces of polysilicon portions and the anode electrode.








 
 
  Recently Added Patents
Secure provisioning of a portable device using a representation of a key
Cooler
Image processing apparatus and method having defective pixel detection and correction ability
Method and system for utilizing native ethernet as a virtual memory interconnect
Information retrieval system, information retrieval method, and information retrieval program
Laminar library screen
Wireless communication system, associated methods and data structures
  Randomly Featured Patents
Camera body
Coupler having arbitrary impedance transformation ratio and arbitrary coubling ratio
Method and device for facilitating double-contrast studies of the upper gastrointestinal tract
Planetary lap
Friction fit tab and slot shape
Multi-size grout striking tool
Output control device and image processing apparatus and method and storage medium
Fuel cell platelet separators having coordinate features
Device security system
Perimeter