Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1987-12-24
1989-08-29
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415744, 20415763, 204193, 422186, 244163, B01J 1908, B64G 146
Patent
active
048614459
ABSTRACT:
Apparatus and method for preventing the escape of contaminates outgassing from polymer materials within an enclosure. In an illustrative embodiment the invention provides an exhaust path for an electronic enclosure 10 containing polymeric materials (12,14). The exhaust path comprises a tubular member 16 which permits the atmospheric gases within the enclosure to escape from the enclosure during liftoff. Within the member are at least one region 26 containing an ionizing source, such as a radioactive substance which emits alpha particles. These alpha particles are relatively low energy particles and are stopped by a relatively thin layer of material. The radiation polymerizes, into a solid surface film 30 outgassing molecular species 28 as they traverse the inner region of the member. The use of the invention provides for permitting the atmospheric gasses within the enclosure to escape the enclosure during the initial ascent and, further, serves as a pathway and removal device for molecular contaminates.
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patent: 3105024 (1963-09-01), Schutz
patent: 3560363 (1971-02-01), Goetz
patent: 3997415 (1976-12-01), Machi
patent: 4507265 (1985-03-01), Higo
Collinson et al, Chemical Reviews, vol. 56, Jun. 1956, pp. 477-483, 517-523.
Lind et al, Journal of American Chemical Society, 48, 1926, pp. 2335-2347.
Hsing Ben C.
Hughes Aircraft Company
Karambelas A. W.
Niebling John F.
Streeter William J.
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