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:
Nov. 13, 2012
Filed:
Apr. 14, 2008
Applicant:
David Forehand, Plano, TX (US);
Inventor:
David Forehand, Plano, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/00 (2006.01); H01L 31/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of making thermodynamically stable, diffusion-impeded barrier layers within, for example, a photovoltaic cell with a metal-containing electrical contact using exposure to fluorine. Exposing the cadmium telluride surface to fluorine creates a Te-poor barrier layer of cadmium fluoride. Once that barrier layer is formed, the metal-containing electrical contact may be applied or formed. The barrier layer allows tunneling current to occur between the p-type layer and the metal-containing electrical contact establishing a low-resistance, highly uniform, and thermally stable electrical contact.