Process for making a phase retarder film
US5658505A · kind A · utility
9Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1995 |
| Grant date | Aug 19, 1997 |
| Priority date | — |
| Expiry date | Feb 27, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31533
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A phase retarder film made of a thermoplastic resin having an in-plane retardation of 50 to 300 nm and a ratio of the in-plane retardation to the retardation normal to the plane of not less than 0.5 but not more than 1.8, a process for the production thereof and a laminate phase retarder film using said phase retarder film above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.