Method and device for metallizing the internal surface of a holl

Details Method and device for metallizing the internal surface of a holl Method and device for metallizing the internal surface of a holl

1983-03-14

1984-12-25

Kittle, John E.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 38, 427237, 427238, 118622, B05D 306, B05B 502

Patent

active

044904088

ABSTRACT:
A coating of metallic material is deposited on the internal surface of a hollow object. An elongate member comprising two electrical conductors extending side-by-side from end-to-end of the member has one end inside the hollow object and its opposite end outside the object. A filament has its two ends connected to the conductors respectively at the one end of the elongate member, and a crucible containing metal to be deposited is supported above the filament and in spaced relationship thereto. By supplying current to the filament by way of the conductors for the filament is heated to achieve thermonic emission. The filament and the crucible are connected to negative and positive terminals respectively of a potential source so that electrons emitted by the filament are accelerated towards the crucible and cause the crucible to be heated by electron bombardment.

REFERENCES:
patent: 4039699 (1977-08-01), Morimoto et al.
patent: 4293594 (1981-10-01), Yoldas et al.

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