JPS6455353A - Shadow mask and its production - Google Patents
Shadow mask and its productionInfo
- Publication number
- JPS6455353A JPS6455353A JP20933987A JP20933987A JPS6455353A JP S6455353 A JPS6455353 A JP S6455353A JP 20933987 A JP20933987 A JP 20933987A JP 20933987 A JP20933987 A JP 20933987A JP S6455353 A JPS6455353 A JP S6455353A
- Authority
- JP
- Japan
- Prior art keywords
- shadow mask
- sheet metal
- alloy
- production
- high definition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To obtain a shadow mask having low coercive force, high magnetic permeability, and high definition, by subjecting an extra thin sheet metal made of Ni-Fe-base alloy containing specific percentages of Cr, C, Mn, and Si to piercing by etching. CONSTITUTION:An alloy which has a composition consisting of, by weight, 60-90% Ni, 1-8% Cr, <=0.1% C, 0.1-3% Mn, 0.01-1% Si, and the balance Fe is refined. This alloy is cold rolled to <=50mum thickness so as to be formed into an extra thin sheet metal. Subsequently, this sheet metal is pierced by the ordinary process, by which the shadow mask having high definition can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20933987A JPS6455353A (en) | 1987-08-25 | 1987-08-25 | Shadow mask and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20933987A JPS6455353A (en) | 1987-08-25 | 1987-08-25 | Shadow mask and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6455353A true JPS6455353A (en) | 1989-03-02 |
Family
ID=16571310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20933987A Pending JPS6455353A (en) | 1987-08-25 | 1987-08-25 | Shadow mask and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6455353A (en) |
-
1987
- 1987-08-25 JP JP20933987A patent/JPS6455353A/en active Pending
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