Material for shadow mask, method for production thereof, shadow mask and image receiving tube
US6946041B2 · kind B2 · utility
1Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2003 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Sep 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0733
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A material for shadow mask having the following composition of components: C≦0.0008 wt %, Si≦0.03 wt %, Mn:0.1 to 0.5 wt %, P≦0.02 wt %, S≦0.02 wt %, Al:0.01 to 0.07 wt %, N≦0.0030 wt %, B: an amount satisfying the formula: 5 ppm≦B−11/14×N≦30 ppm, balance: Fe and inevitable impurities; a method for producing the material; a shadow mask using the material (cold rolled steel sheet); and an image receiving tube equipped with the shadow mask. The material has excellent etching characteristics, which are uniform within the same coil, and excellent press formability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.