Method of making grid lines for thermally-transferred color filter array element
US5077155A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | May 4, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133512
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process of making opaque grid lines for a color filter array element comprising PA1 a) exposing a photographic element comprising an unhardened gelatin-silver halide emulsion coated on a support to light through a mask which defines the grid pattern, the emulsion being coated at a total dry weight coverage of at least 0.5 g/m.sup.2 ; PA1 b) developing the element with a tanning developer to develop the exposed areas of grid lines; PA1 c) washing off the undeveloped emulsion leaving the grid line pattern on the element; and PA1 d) drying the element to produce open cells on the support divided by opaque lines of silver in hardened gelatin greater than 0.3 .mu.m in height above the support. In a preferred embodiment, the process includes the further steps of: PA1 d) coating the cellular element with a polymeric dye-receiving layer; and PA1 e) thermally transferring individual dyes to form a color filter array element comprising a repeating mosaic pattern of colorants in a polymeric binder, the pattern being made up of color patches bounded by the opaque lines in a grid pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.