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:
Sep. 01, 1987
Filed:
May. 13, 1985
Applicant:
Inventors:
James A Gregory, Sudbury, MA (US);
Jack I Hanoka, Brookline, MA (US);
Zinovy Y Vayman, Brookline, MA (US);
Assignee:
Mobil Solar Energy Corporation, Billerica, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
136256 ; 136261 ; 357 30 ; 357 52 ; 357 91 ; 2504922 ; 427 74 ; 437-2 ; 437 20 ;
Abstract
An improved optical match to a subsequently-formed antireflection overcoating is achieved by providing a silicon solar cell substrate with an altered surface layer that is formed by an ion-beam process, and has a refractive index between about 3.4 and about 3.6 at 633 nm and between about 3.6 and about 3.8 at 442 nm. The surface layer is formed by adding between about 2% and about 10% methane, by volume, to the hydrogen flow in a Kaufman type broad beam ion source.