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:
Dec. 23, 1997
Filed:
May. 26, 1995
Shinji Nakamura, Kyoto, JP;
Chojiro Kuriyama, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
The use of a wire of a metal other than tantalum as a lead wire fixed to a chip formed by sintering tantalum powder is enabled. Prior to the formation of a dielectric film on a chip through anodic oxidation, an insulating material is applied to a surface of the lead wire fixed to the chip at a connection with the chip. With the application of the insulating material, a short circuit between the lead wire and a chemical conversion solution is prevented when the entire chip is drenched in the chemical conversion solution in anodic oxidation, so that a dielectric film of tantalum pentoxide is surely formed on the chip. As the lead wire, an arbitrary metal having conductivity may be used.