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:
Mar. 01, 2005
Filed:
Dec. 09, 2002
John James Felten, Chapel Hill, NC (US);
John James Felten, Chapel Hill, NC (US);
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The invention is directed to a method to embed a thick film resistor composition into a printed wiring board comprising the steps of applying a reinforcing composition onto a resistor composition disposed on a metallic substrate forming an assembly wherein the resistor composition is at least partially coated with the reinforcing composition; processing the assembly; and applying the assembly onto at least one side of an organic substrate forming a component wherein the organic substrate is at least partially coated with an adhesive layer and wherein the reinforcing composition side of the assembly is embedded into the adhesive layer. The reinforcing composition allows laser trimming of the fired resistor and also eliminates cracking during lamination steps of the invention.