Method for manufacturing on a film substrate at a temperature above its glass transition
Assignee3M Innovative Properties Company
InventorsMark A. Roehrig, Yufeng R. Liu, Robert W. Peterson
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Abstract
A method for preparing a flexible film substrate with a low glass transition temperature can be used in the production of an article that retains dimensions and improves the surface smoothness after high temperature processing. The invention, for example, would enable low temperature films such as PET and PEN to be dimensionally stable and ultra flat at conditions commonly used in electronic processing which can typically exceed 200° C. More specifically, the methods enable the use of e.g. barrier films based on PET or PEN in OLED/PLED manufacturing.
Claims16
A method of preparing a film for elevated temperature processing, comprising:
- providing a film having comprising a polymeric substrate having a glass transition temperature under about 200° C., and further comprising at least one layer of metal oxide and at least one layer of coated polymer;
- clamping the film so as to place the film under tension in at least two orthogonal directions;
- heating the clamped film above its glass transition temperature.
Dependencies are inferred from the claim text.