US Patent 7888654 Cold field emitter

Patent 7888654 was granted and assigned to FEI Company on February, 2011 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

FEI Company

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

78886540

Patent Inventor Names

Theodore Carl Tessner, II0

Lynwood W. Swanson0

Gregory A. Schwind0

Date of Patent

February 15, 2011

Patent Application Number

119009560

Date Filed

September 14, 2007

Patent Citations Received

‌

US Patent 11715615 Light modulated electron source

Patent Primary Examiner

Jack I. Berman

Patent abstract

A stable cold field electron emitter is produced by forming a coating on an emitter base material. The coating protects the emitter from the adsorption of residual gases and from the impact of ions, so that the cold field emitter exhibits short term and long term stability at relatively high pressures and reasonable angular electron emission.

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