Coating processes – Electrical product produced
Patent
1994-02-18
1995-01-03
Beck, Shrive
Coating processes
Electrical product produced
427358, 4273722, 427384, B05D 512
Patent
active
053784944
ABSTRACT:
A method of applying a thin coating to the lower surface of a bilevel substrate includes the following steps: A liquid coating, such as a material useful as an alignment layer, is applied over a bilevel substrate, such as an LCD panel. The bilevel substrate may have flat-topped ribs or other protrusions so long as the tops of the protrusions are coplanar. Next, a leveling device, such as a doctor blade, is moved across the upper surface of the bilevel substrate so that the liquid coating is removed from the upper surface but remains on the lower surface. Finally, the liquid coating is hardened and shrunk, e.g., by drying or curing, resulting in a highly uniform hardened coating, such as an alignment layer, on the lower surface of the bilevel substrate.
REFERENCES:
patent: 1494630 (1923-06-01), Reizenstein
patent: 3941901 (1976-03-01), Harsch
patent: 4235525 (1980-11-01), Berman et al.
patent: 4261650 (1981-04-01), Sprokel
patent: 5077157 (1991-12-01), DiSanto et al.
patent: 5106441 (1992-04-01), Brosig et al.
patent: 5128788 (1992-07-01), Takatoh et al.
patent: 5268782 (1993-12-01), Wenz et al.
Thomas Patrick A.
Wenz Robert P.
Beck Shrive
Griswold Gary L.
Kirn Walter N.
Levinson Eric D.
Minnesota Mining and Manufacturing Company
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