US Patent 7566920 Bipolar transistor and power amplifier

Patent 7566920 was granted and assigned to Panasonic on July, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Panasonic

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

75669200

Date of Patent

July 28, 2009

Patent Application Number

114847530

Date Filed

July 12, 2006

Patent Primary Examiner

‌

Sue Purvis

Patent abstract

A base mesa finger (an emitter ledge layer 15, a base layer 16, and a collector layer 17) is interposed between two collector fingers (collector electrodes 13), and on the base mesa finger, a base finger (a base electrode 12) and two emitter fingers (an emitter layer 14 and an emitter electrode 11) on both sides of the base finger, are formed. The two emitter fingers are formed symmetric with respect to the base finger as a reference.