Gettering device and method

Details Gettering device and method Gettering device and method

1981-05-08

1983-10-04

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Generating gas or vapor within an envelope, or coating by...

445 55, 445 17, 2521812, 2521816, H01J 920

Patent

active

044076568

ABSTRACT:
The invention relates to a method of manufacturing a color television display tube having an envelope including a conical portion (11) and a window portion (12) which are sealed together in a vacuum-tight manner by means of a sealing glass (18). Before these portions are sealed together, a gettering device (21) is assembled in a place inside the envelope of the tube, for example to the internal magnetic screening cap (17) or the high-voltage contact (26). The gettering device (21) comprises a source of evaporable gettering metal and at least one gas source formed from a material which releases gas upon heating. The gas-releasing material includes a nitrided pulverulent ternary alloy of iron, germanium and at least one of the metals chromium and manganese. Such a gas-releasing material can be exposed to moist air of 450.degree. C. for at least one hour without any deterioration, which conditions occur when the window portion (12) and the conical portion (11) are sealed together.

REFERENCES:
patent: 4111689 (1978-09-01), Liu
patent: 4203860 (1980-05-01), Ichise et al.

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