发明名称 |
Method of making multicolor CRT display screen with minimal phosphor contamination |
摘要 |
An improved method of forming a multicolor cathode-ray tube display screen to minimize phosphor contamination. A light-absorbing matrix is first formed on the inner surface of a CRT faceplate, preferably by photoetching of a substantially black metallic layer. Then, multiple color dot patterns are deposited in the matrix openings by (a) depositing a layer of positive photoresist on the matrix and any previously-deposited dot pattern; (b) exposing the resist through a shadow mask to light from a point source positioned to simulate an electron gun; (c) developing the resist to form an integral mask containing a pattern of holes aligned with the matrix openings for one color phosphor; (d) coating the developed resist layer with a photohardenable phosphor slurry; (e) exposing the slurry coating through the faceplate to light from a diffuse source; (f) developing the slurry to remove the unexposed portions, leaving a pattern of dots of one color; and (g) stripping away the photoresist masking layer. Steps (a) through (g) are then repeated to produce each additional color dot pattern.
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申请公布号 |
US4251610(A) |
申请公布日期 |
1981.02.17 |
申请号 |
US19790090709 |
申请日期 |
1979.11.02 |
申请人 |
TEKTRONIX, INC. |
发明人 |
HAVEN, DUANE A.;CHITWOOD, DONALD P. |
分类号 |
G03F7/00;H01J9/227;(IPC1-7):G03C5/00 |
主分类号 |
G03F7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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