The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2007
Filed:
Dec. 08, 2004
Reinhard Losehand, Munich, DE;
Reinhard Losehand, Munich, DE;
Infineon Technologies AG, Munich, DE;
Abstract
A high-frequency switching transistor comprises a collector area, which has a first conductivity type, a first barrier area bordering on the collector area, which has a second conductivity type which differs from the first conductivity type, and a semiconductor area bordering on the first barrier area, which has a dopant concentration which is lower than a dopant concentration of the first barrier area. Further, the high-frequency switching transistor has a second barrier area bordering on the semiconductor area, which has a first conductivity type, as well as a base area bordering on the second barrier area, which has a second conductivity type. Additionally, the high-frequency switching transistor comprises a third barrier area bordering on the semiconductor area, which has the second conductivity type and a higher dopant concentration than the semiconductor area. Further, the high-frequency switching transistor has an emitter area bordering on the third barrier area, which has the first conductivity type. Thereby it is possible to provide a high-frequency switching transistor, which has a lower bias voltage, a higher switchable power as well as a shorter switching time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile