Donald R Ozogar

US Patent:

54645700, Nov 7, 1995

Filed:

Oct 25, 1993

Appl. No.:

8/140958

Inventors:

Frans P. Lautzenhiser - Noblesville IN
Bradley H. Carter - Kokomo IN
Donald A. Ozogar - Kokomo IN

Assignee:

Delco Electronics Corporation

International Classification:

H01B 100

US Classification:

252500

Abstract:

The invention includes the discovery that the addition of a thermosetting polymer to a thick-film conductor formulation including a thermoplastic polymer will substantially retard the spreading of the thick-film conductor ink upon firing of the printed conductor. The thermosetting polymer may be from the family of allylic esters, for example poly(diallyl phthalate). The invention also includes the discovery that the thermosetting resin can be dissolved with an organic solvent to form an additive so as to uniformly distribute the thermosetting polymer within the thick-film conductor formulation including the thermoplastic polymers. Preferred organic solvents include alcohols with a weight ratio of thermoset-to-organic solvent ranging from about 1:1. 5 to about 1:3.