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:
Oct. 23, 2007
Filed:
Nov. 12, 2003
Kuppsuamy Kanakarajan, Dublin, OH (US);
Brian C. Auman, Pickerington, OH (US);
Sounak Banerji, Cary, NC (US);
Kuppsuamy Kanakarajan, Dublin, OH (US);
Brian C. Auman, Pickerington, OH (US);
Sounak Banerji, Cary, NC (US);
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The present invention relates to a multi-layer laminate having a low glass transition temperature polyimide layer, a high glass transition temperature polyimide layer, and a conductive layer. The low glass transition temperature polyimide layer is synthesized by contacting an aromatic dianhydride with a diamine component, the diamine component comprising about 50 to about 90 mole % aliphatic diamine (the remainder being aromatic diamine) having the structural formula HN—R—NHwherein R is hydrocarbon from Cto C. The low glass transition polyimide is an adhesive and has a glass transition temperature in the range of from 150° C. to 200° C. The high glass transition temperature polyimide layer has a glass transition temperature above the low glass transition temperature polyimide layer and is a thermoset polyimide. A multi-layer-layer substrate of the present invention has the high glass transition temperature polyimide layer positioned between the conductive layer and the low glass transition polyimide, or optionally contains an additional low glass transition temperature polyimide positioned between the conductive layer and the high glass transition polyimide layer.