Back to results
US 6,322,860 B1Granted
Plastic substrates for electronic display applications
AssigneeRohm and Haas Company
InventorsAlan Daniel Stein, Michael Paul Hallden-Abberton, Audrey Brenda Liss, Steven David Fields
Life of this patent
Estimating the term…
Abstract
Disclosed is the use of certain polyglutarimides as plastic substrates for use in electronic display applications. These substrates have relatively high Tgs for plastics, and good optical clarity and flatness, with low shrinkage and low birefringence. Also disclosed are electronic display cells made using such polyglutarimide substrates.
Claims19
A plastic substrate for electronic display applications, comprising a polyglutarimide sheet of 25 mm or less having a Tg of at least 150° C.;
- total white light transmission of at least 88%;
- and a shrinkage of no more than 0.1%;
- wherein the polyglutarimide sheet has a waviness of ≦1μ in a profile over a 20 mm sampling length;
- and wherein the polyglutarimide sheet has an optical retardance of no more than 20 nm.
1 more element
A plastic substrate for electronic display applications, comprising:
- polyglutarimide sheet of 25 mm or less having a Tg of at least 150° C.;
- total white light transmission of at least 88%;
- and a shrinkage of no more than 0.1%;
- wherein the polyglutarimide sheet has a waviness of ≦1μ in a profile over a 20 mm sampling length;
- and wherein the polyglutarimide sheet has an optical retardance of no more than 20 nm;
- a layer of crosslinked coating disposed on either side of the polyglutarimide sheet;
- and
- a layer of a barrier coating disposed on each layer of crosslinked coating, exterior to the glutarimide sheet;
- and
- a layer of a clear conductive coating disposed on a layer of the barrier coating, exterior to the crosslinked coating.
7 more elements
Dependencies are inferred from the claim text.