Environmentally safe methods and apparatus for depositing and/or

Details Environmentally safe methods and apparatus for depositing and/or Environmentally safe methods and apparatus for depositing and/or

1992-06-15

1994-11-22

Padgett, Marianne

Coating processes

Coating by vapor, gas, or smoke

427250, 427345, 427561, 427569, 427576, 427570, B05D 306, C23C 1600, C23C 1424

Patent

active

053667646

ABSTRACT:
This invention describes an environmentally and occupationally safer method and apparatus for coating and/or reclaiming materials in low pressure inert atmospheres. This invention is useful for coating a large number of irregularly shaped articles, such as industrial fasteners, tools and the like, with metals, semiconductor materials, composites, or alloys. The process related to this invention is also useful for coating parts in a rack or barrel type coating apparatus, as well as the continuous coating of parts which are fed through the path of material vapor streams. The processes and apparatus disclosed use sublimation techniques which allow almost unrestricted size, shape and placement of the depositing source. Heating sources serve to sublimate materials which can then be directed to the desired substrate for condensing. Additional heating sources may be provided to prevent vapors from condensing on chamber surfaces, or these heating sources may be used to periodically or continuously recover extraneously deposited material. In the reclamation mode, coated articles may be heated until sublimation of the coating occurs to allow the material to be reclaimed for safe disposal or reuse.

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