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. 17, 2001
Filed:
Nov. 10, 1998
Abstract
A method for manufacturing varistor by which a varistor having a high plating resistance and a high moisture resistance is manufactured by selectively forming a compact high-resistance layer having a uniform thickness on the surface of a varistor element. In the method, the varistor element (,) is first formed by alternately laminating ceramic sheets (,) mainly of a zinc oxide and internal electrodes (,) upon one another, and then, Ag electrode paste which becomes external electrodes (,) is applied to both end faces of the element (,). Then, after the element (,) is sintered through heat treatment, the element (,) is buried in SiO,or a mixture (,) containing SiO,and the element (,) is heat-treated for 5-10 minutes at 600-950° C. in the air or in an oxygen atmosphere.