Method for manufacturing on a film substrate at a temperature above its glass transition
First Claim
Patent Images
1. A method for elevated temperature processing of a film, comprising:
- providing a film 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 clamped film under tension in at least two orthogonal directions; and
holding the clamped film flat in a zero strain condition while subjecting the clamped film to elevated temperature processing comprising heating the clamped film in the zero strain condition above the glass transition temperature of the polymeric substrate, wherein the clamped film does not show any visible curl or distortion when unclamped after said elevated temperature processing.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
16 Claims
-
1. A method for elevated temperature processing of a film, comprising:
-
providing a film 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 clamped film under tension in at least two orthogonal directions; and holding the clamped film flat in a zero strain condition while subjecting the clamped film to elevated temperature processing comprising heating the clamped film in the zero strain condition above the glass transition temperature of the polymeric substrate, wherein the clamped film does not show any visible curl or distortion when unclamped after said elevated temperature processing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification