Coating processes – Direct application of electrical – magnetic – wave – or... – Sonic or ultrasonic
Patent
1992-12-21
1994-07-12
Beck, Shrive
Coating processes
Direct application of electrical, magnetic, wave, or...
Sonic or ultrasonic
427162, 427163, 427168, 4273722, 295921, 359 80, 359 81, B05D 506
Patent
active
053287282
ABSTRACT:
A process for manufacturing a substrate (12) used in a device (10) for containing a liquid crystal fluid (30) between two spaced electrodes. A plurality of spacers (35) is distributed on a first surface of a substrate by coating the first surface with an admixture of spacers dispersed in a liquid (36). The admixture is agitated during the applications step in order to maintain a uniform dispersion of the spacers in the liquid. The liquid is then evaporated from the substrate surface, leaving a plurality of spacers distributed on the substrate. Preferably, an ester alcohol dispersant is employed in the admixture in order to facilitate dispersion of the spacers in the liquid. Ultrasonics are preferred as the means of agitating the admixture during application. Ultrasonic energy can also be applied to the substrate during application of the admixture to the substrate. Ultrasonic energy can also be applied to the admixture at the point of application (44) of the admixture onto the substrate.
REFERENCES:
patent: 4148128 (1979-04-01), Feldman
patent: 4341445 (1992-07-01), Matsuyama et al.
patent: 4470668 (1984-09-01), Inoue et al.
patent: 4705360 (1987-11-01), Funada et al.
patent: 4973138 (1990-11-01), Yamazaki et al.
Mulligan Robert J.
Swirbel Thomas J.
Williams Melanie
Beck Shrive
Dorinski Dale W.
Maiorana David
Motorola Inc.
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