Gettering device and method
US4407656A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 1981 |
| Grant date | Oct 4, 1983 |
| Priority date | — |
| Expiry date | May 8, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J7/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.