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:
Nov. 05, 2013
Filed:
Jul. 23, 2010
Thomas Edward Carney, Orient, OH (US);
Jeffrey Michael Bartolin, Westerville, OH (US);
Meredith L. Dunbar, Canal Winchester, OH (US);
Scott John Herrmann, Gahanna, OH (US);
Thomas Edward Carney, Orient, OH (US);
Jeffrey Michael Bartolin, Westerville, OH (US);
Meredith L. Dunbar, Canal Winchester, OH (US);
Scott John Herrmann, Gahanna, OH (US);
E.I. du Pont de Nemours & Company, Wilmington, DE (US);
Abstract
The present disclosure is directed to a base film having a thickness from 8 to 152 microns, a 60 degree gloss value from 2 to 35, an optical density greater than or equal to 2 and a dielectric strength greater than 1400 V/mil. The base film comprises a chemically converted (partially or wholly aromatic) polyimide in an amount from 71 to 96 weight percent of the base film. The base film further comprises a pigment and a matting agent. The matting agent is present in an amount from 1.6 to 10 weight percent of the base film, has a median particle size from 1.3 to 10 microns, and has a density from 2 to 4.5 g/cc. The pigment is present in an amount from 2 to 9 weight percent of the base film. The present disclosure is also directed to coverlay films comprising the base film in combination with an adhesive layer.