GB1324377A - Process for fabricating a screen structure for a cathode ray tube - Google Patents
Process for fabricating a screen structure for a cathode ray tubeInfo
- Publication number
- GB1324377A GB1324377A GB4650970A GB4650970A GB1324377A GB 1324377 A GB1324377 A GB 1324377A GB 4650970 A GB4650970 A GB 4650970A GB 4650970 A GB4650970 A GB 4650970A GB 1324377 A GB1324377 A GB 1324377A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dye
- phosphor
- screen
- solution
- mordant
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 3
- 239000000975 dye Substances 0.000 abstract 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 9
- 239000000463 material Substances 0.000 abstract 4
- 239000000203 mixture Substances 0.000 abstract 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 abstract 2
- 229910002804 graphite Inorganic materials 0.000 abstract 2
- 239000010439 graphite Substances 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 229920002120 photoresistant polymer Polymers 0.000 abstract 2
- 238000005406 washing Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000001828 Gelatine Substances 0.000 abstract 1
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract 1
- 239000001063 aluminium ammonium sulphate Substances 0.000 abstract 1
- 235000011124 aluminium ammonium sulphate Nutrition 0.000 abstract 1
- LCQXXBOSCBRNNT-UHFFFAOYSA-K ammonium aluminium sulfate Chemical compound [NH4+].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O LCQXXBOSCBRNNT-UHFFFAOYSA-K 0.000 abstract 1
- ITHZDDVSAWDQPZ-UHFFFAOYSA-L barium acetate Chemical compound [Ba+2].CC([O-])=O.CC([O-])=O ITHZDDVSAWDQPZ-UHFFFAOYSA-L 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000004833 fish glue Substances 0.000 abstract 1
- 229920000159 gelatin Polymers 0.000 abstract 1
- 235000019322 gelatine Nutrition 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 239000001044 red dye Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
- H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/221—Applying luminescent coatings in continuous layers
- H01J9/223—Applying luminescent coatings in continuous layers by uniformly dispersing of liquid
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
1324377 Luminescent screens RCA CORPORATION 30 Sept 1970 [1 Oct 1969] 46509/70 Heading H1D A method of fabricating a C.R.T. screen structure comprises covering discrete surface areas with phosphor mixed with a photo resist material insolubilized by light, applying a light opaque dye 11a as a solution to the phosphor deposits and insolubilizing by applying a mordant solution, applying to the covered and uncovered areas a screen material mixed with a soluble photo-resist material, e.g. dichromate sensitized P.V.A., projecting radiation through the screen support to insolubilize the overcoating mixture between the phosphor deposits and removing the remaining overcoat mixture. The photo-resist with the phosphor may be P.V.A., fish glue or gelatine, and the dye and mordant solutions may be aqueous e.g. a mordant solution of 2 % by wt. aluminium chloride, 1% by wt. barium acetate or aluminium ammonium sulphate and an aqueous dye solution of 5% black dye with 1À25% P.V.A. or a red dye may be used. The overcoating mixture may be lightabsorbing, e.g. of graphite, to produce a matrix type screen, or may be of a phosphor material. Overcoating 12 may be of water, graphite particles and a dichromated sensitized polyvinyl alcohol, and after drying, exposed to U.V. lamps 13. The dye and mordant are preferably thermally decomposed with the organic photoresist on bake-out. The production of an insolubilized dye prior to the step of selective dye removal ensures the insolubilized dye is not leached or removed from the phosphor coated areas in any subsequent process step and the dye area ensures less than 2% U.V. transmission. As exemplified, dye areas 11a are formed by initially coating the entire screen area with the dye solution, insolubiilzing, and then washing with water spray, the insoluble dye layer then washing off the glass area. The process may be applied to two types of phosphor dots, the remaining screen area being covered with a third phosphor. Colour TV shadow mask tubes are exemplified and dot type phosphor screens are instanced and also grid and bar type screens.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86275869A | 1969-10-01 | 1969-10-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1324377A true GB1324377A (en) | 1973-07-25 |
Family
ID=25339267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4650970A Expired GB1324377A (en) | 1969-10-01 | 1970-09-30 | Process for fabricating a screen structure for a cathode ray tube |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS4913426B1 (en) |
| CA (1) | CA924564A (en) |
| DE (1) | DE2048366C3 (en) |
| FR (1) | FR2068255A5 (en) |
| GB (1) | GB1324377A (en) |
| NL (1) | NL7014369A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2000366A (en) * | 1977-06-16 | 1979-01-04 | Philips Nv | Cathode ray tube screen |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57115123U (en) * | 1981-01-08 | 1982-07-16 | ||
| JPS5886402U (en) * | 1981-12-08 | 1983-06-11 | 株式会社 モリタ東京製作所 | dental wireless turbine |
-
1970
- 1970-08-26 CA CA091657A patent/CA924564A/en not_active Expired
- 1970-09-30 NL NL7014369A patent/NL7014369A/xx unknown
- 1970-09-30 JP JP8582170A patent/JPS4913426B1/ja active Pending
- 1970-09-30 FR FR7035311A patent/FR2068255A5/fr not_active Expired
- 1970-09-30 GB GB4650970A patent/GB1324377A/en not_active Expired
- 1970-10-01 DE DE19702048366 patent/DE2048366C3/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2000366A (en) * | 1977-06-16 | 1979-01-04 | Philips Nv | Cathode ray tube screen |
| GB2000366B (en) * | 1977-06-16 | 1982-01-27 | Philips Nv | Colour display tube and screen therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| CA924564A (en) | 1973-04-17 |
| FR2068255A5 (en) | 1971-08-20 |
| NL7014369A (en) | 1971-04-05 |
| JPS4913426B1 (en) | 1974-03-30 |
| DE2048366C3 (en) | 1979-01-18 |
| DE2048366B2 (en) | 1978-05-11 |
| DE2048366A1 (en) | 1971-04-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |