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:
Apr. 12, 2011
Filed:
Nov. 29, 2005
Philippe Meunier-beillard, Kortenberg, BE;
Hendrik G. A. Huizing, Neerkant, NL;
Philippe Meunier-Beillard, Kortenberg, BE;
Hendrik G. A. Huizing, Neerkant, NL;
NXP B.V., Eindhoven, NL;
Abstract
The invention relates to the manufacture of an epitaxial layer, with the following steps: providing a semiconductor substrate; providing a Si—Ge layer on the semiconductor substrate, having a first depth; —providing the semiconductor substrate with a doped layer with an n-type dopant material and having a second depth substantially greater than said first depth; performing an oxidation step to form a silicon dioxide layer such that Ge atoms and n-type atoms are pushed into the semiconductor substrate by the silicon dioxide layer at the silicon dioxide/silicon interface, wherein the n-type atoms are pushed deeper into the semiconductor substrate than the Ge atoms, resulting in a top layer with a reduced concentration of n-type atoms; removing the silicon dioxide layer; growing an epitaxial layer of silicon on the semiconductor substrate with a reduced outdiffusion or autodoping.