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:
Feb. 28, 2006
Filed:
Jan. 23, 2004
Armin Tilke, München, DE;
Kristin Schupke, Dresden, DE;
Armin Tilke, München, DE;
Kristin Schupke, Dresden, DE;
Infineon Technologies AG, Munich, DE;
Abstract
In a method of producing a bipolar transistor, a semiconductor substrate having a substrate surface is provided. A base-terminal layer for providing a base terminal is formed on the substrate surface, and an emitter window having a wall area is formed in the base-terminal layer. A first spacing layer is formed on the wall area of the emitter contact window, and a recess is etched into the substrate within a window specified by the first spacing layer. A base layer contacted by outdiffusion from the base-terminal layer is formed in the recess of the emitter window, and a second spacing layer is formed on the first spacing layer and on the base layer. The second spacing layer is structured for the purpose of specifying a planar terminal pad on the base layer, and an emitter layer is formed on the planar terminal pad.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile