Surface energy control methods for color filter printing
US7879390B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2007 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Oct 15, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/201
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Black matrix (BM) material is deposited on glass and patterned to form walls that define an array of wells. Various surface treatments and masking schemes are utilized to achieve surface energy control of the BM glass. The surface treatments include one or more of chemically treating the BM walls by depositing hydrophobic self-assembled monolayers on the uppermost wall surfaces, and plasma treatments to control the surface energy of the various BM glass surfaces. Masking processes include backside exposure and development of photoresist, and maskless, self-aligned photo-patterning of the monolayers. Color filter ink is then injected into each well from an ink jet print head. The high surface energy of the lower and side wall surfaces facilitates wetting of the ink, and the low surface energy of the monolayers prevents intermixing of ink between adjacent wells. The ink then dries to form a color filter in each well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.