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. 19, 1988
Filed:
Dec. 02, 1985
Wei-Yean Howng, Albuquerque, NM (US);
Rong-Fong Huang, Albuquerque, NM (US);
Rickey G Pastor, Albuquerque, NM (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A first layer of titanium or tin is vapor deposited upon opposing major surfaces on the ceramic sensor. A second layer consisting of platinum, palladium or ruthenium is deposited over the first layer. The structure is then preferably annealed in air in order to crystallize the external layer to roughen the exterior surface and enhance adhesion. Lead wires, preferably made of Nichrome, are attached to the opposing surfaces by applying a conductive paste to the wire and surface functions, and firing the structure. The conductive paste provides a relatively low resistance, strong, mechanical bond between the lead wires and the roughened external surfaces of the structure. The first layer facilitates bonding of the second layer to the ceramic. The first and second layers cooperate to protect the ceramic from the potentially harmful glass frit contained in the conductive paste.