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:
Jan. 22, 1991
Filed:
Apr. 18, 1990
Applicant:
Inventors:
Assignee:
Nippon Sheet Glass Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ;
U.S. Cl.
CPC ...
65 3013 ; 20415745 ; 20415751 ; 427164 ;
Abstract
The present invention concerns a method of preparing an alkali metal diffusion-preventive layer by applying one of three specific methods in a method of forming an alkali metal diffusion-preventive layer containing phosphorus at the inside of the substrate containing silicon by ion implantation of phosphorus, thereby enabling to prepare an alkali metal diffusion-preventive layer having higher alkali metal diffusion-preventive performance than that of the alkali metal diffusion-preventive layer prepared by the conventional method.