Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1989-08-07
1992-04-14
Lawrence, Evan
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427240, 427346, 427425, B05D 104, B05D 312
Patent
active
051046822
ABSTRACT:
A highly reflective surface coating on a substrate is formed by a coating method in a coating line. A paint is sprayed on the substrate in a viscosity of 18 seconds or lower when measured by means of Ford Cup #4 at 20.degree. C. in a film thickness thicker than a thickness at which the paint sags, the paint containing a solvent or solvents, having a boiling point as high as 110.degree. C. or lower in an amount of 50% by weight or higher.
After completion of the spraying, a coat of the paint is dried by a drying step including sequential setting and baking steps. The substrate is held in an ambient temperature during the setting step which is lower than the ambient temperature during the baking step, and the rotation of the substrate in the drying step being carried out about its horizontal axis at a speed which is high enough to rotate the substrate from a vertical position to a horizontal position before the paint coated thereon substantially sags due to gravity yet which is low enough so as to cause no sagging as a result of centrifugal force, thereby allowing the coat formed thereon to achieve a substantially sagless state.
This coating method prevents the paint from swelling on an edge portion of the substrate forming a mass, whereby a coat surface is provided with a high degree of flatness.
REFERENCES:
patent: 4874639 (1989-10-01), Matsui et al.
patent: 4919977 (1990-04-01), Yamane et al.
patent: 4968530 (1990-11-01), Yamane et al.
Nakahama Tadamitsu
Tanimoto Yoshio
Yamane Takakazu
Lawrence Evan
Mazda Motor Corporation
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