Eugene C Herrmann

US Patent:

7280170, Oct 9, 2007

Filed:

Jul 20, 2004

Appl. No.:

10/895787

Inventors:

Nickey Ambrose - Mt. Vernon IN, US
Grant Hay - Evansville IN, US
Eugene David Herrmann - Clifton Park NY, US
Karkala Arun Kumar - Evansville IN, US
Philip Matthew Peters - Mt. Vernon IN, US
Joe Riello - Pittsfield MA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

G02F 1/1335

US Classification:

349 62, 349 64, 362355

Abstract:

A method of making an optical film comprises heating the optical film comprising greater than or equal to 80 wt. % polycarbonate to a sufficient temperature to stretch the optical film, wherein the weight percent is based on a total weight of the optical film; and stretching the optical film, wherein a resulting stretched optical film has a linear CTE measured in a direction parallel to a stretching direction of less than or equal to 50×10cm/cm/ C.