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:
Jul. 15, 1997
Filed:
Oct. 19, 1995
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
On a metallic wiring substrate, a first metallic layer is connected to a second metallic layer at a non-anodic-oxide section of the first metallic layer exposed at a bottom of a contact hole. The surface of the first metallic layer is anodically oxidized except for the non-anodic-oxide section. After resist is patterned so as to be entirely positioned on the surface of the first metallic layer, the first metallic layer is anodically oxidized, and the resist is removed therefrom. In such a manner, the non-anodic oxide section and the anodic oxide section are formed. This method makes it possible to produce the metallic wiring substrate having good insulation properties between layers easier than a method for forming the non-anodic-oxide section by etching the anodic oxide section.