| 发明名称 |
METHOD AND APPARATUS FOR CONTROLLING THE SIZE OF PERFORATIONS IN A SHADOW MASK |
| 摘要 |
Air is blown onto a television shadow mask during the etching of the holes in the mask in order to remove excess etching solution from the holes and permit optical measurement of the size of the holes. Air is also blown onto the optical measurement apparatus for the same purpose.
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| 申请公布号 |
US3645811(A) |
申请公布日期 |
1972.02.29 |
| 申请号 |
USD3645811 |
申请日期 |
1970.03.02 |
| 申请人 |
BUCKBEE-MEARS CO. |
发明人 |
JOHN G. DAVIES;JOHN C. THOMAS |
| 分类号 |
C23F1/00;H01J9/14;(IPC1-7):C23F1/02;B23P15/00 |
主分类号 |
C23F1/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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