GB2234064A - Sample preparing method for phospher layers of cathode ray tubes - Google Patents
Sample preparing method for phospher layers of cathode ray tubes Download PDFInfo
- Publication number
- GB2234064A GB2234064A GB8926009A GB8926009A GB2234064A GB 2234064 A GB2234064 A GB 2234064A GB 8926009 A GB8926009 A GB 8926009A GB 8926009 A GB8926009 A GB 8926009A GB 2234064 A GB2234064 A GB 2234064A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphor layer
- sample
- cathode ray
- ray tube
- layer
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/01—Recovery of luminescent materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Sampling And Sample Adjustment (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
The phosphor layer adhered to a panel is chemically treated to cause its removal and optionally then cleaned with pure water and heat-treated to obtain a sample of phosphor layer in thin film form. Layer inspections for determining the shape of the phosphor particles, their bonding state, the thickness of the phosphor layer and the film layer and the formation state of the black matrix can be carried out on the prepared sample.
Description
SAMPLE PREPARING METHOD FOR PHOSPHOR LAYER
OF CATHODE RAY TUBE
Field of the Invention
The present invention relates to a sample preparing method for the phosphor layer of a cathode ray tube, by which samples of the phosphor layer are filed in order to permanently keep them, so that the formation state of the phosphor layer of a cathode ray tube should be made to be easily observable.
Background of the Invention
Generally, samples of a cathode ray tube or particularly samples of a phosphor layer are kept in the original state with the layer adhered on the panel, but this is accompanied by various problems in storing and maintaining them. Particularly, if the phosphor layer is to be observed, many kinds of handling inconveniences are involved, and in practical observations, if a microscope is to be used, a precise observation becomes impossible because the phosphor layer is adhered to the panel.
SummarY of the Invention
Therefore it is the object of the present invention to provide a sample preparing method for the phosphor layer of a cathode ray tube in which samples of the phosphor layer of a cathode ray tube are taken in the form of a film in such a manner that they can be conveniently and permanently stored, and that they should be rendered possible to observe precisely.
In achieving the above object, the sample preparing mathod according to the present invention comprises:
step of softening the phosphor layer adhered on the panel by heating up the panel and treating a chemical thereto;
step of detaching the softened phosphor layer from the panel by applying another proper chemical to the softened phosphor layer;
step of cleaning the detached phosphor layer with pure water; and
step of heat-treating the cleaned phosphor layer at a certain temperature, thereby forming a phosphor layer sample in the form of a film.
Descrintion of the Dreferred embodiment
The above object and other davantages of the present invention will become more apparent by describing in detail the preferred embodiment of the present invention.
Through the phosphor layer forming process, a black matrix, phosphor stripes and a filming layer are formed, and before a metal back made of an aluminum layer is deposited on the surface of the phosphor layer, the panel which has not been bonded to the funnel is heated to a temperature of 45 C (t 2 C ) for 3-- 4 minutes. Then a thin acetone (CH3 COCH3 ) is administered to the surface of the softened phosphor layer, i.e., to the inner surface of the panel1 or alternatively, the whole panel may be immersed into an acetone solution preferably for about 5 imnutes. Then, a thin hydrogen peroxide (H2 O2 ) is applied for a neutralization, so that the phosphor layer should be detached from the inner face of the panel.Thereafter pure water is sprinkled to the detached phosphor layer with a pressure of 1.5kg /an' so as for the above chemical compounds to be washed off, and then, the detached phosphor layer is cut out in a proper size. This sample is heat-treated twice: first at a temperature of 50"C for 10 minutes, and then, at a temperature of 100"C for 20 minutes.
The film of the phosphor layer which is prepared through the above described process keeps the black matrix and the phosphor stripes intact in the original form, and therefore, it becomes easy to observe them through a microscope, while particularly, if the film is inserted between highly transparent acetate vinyl sheets, then the observation and the storage can be facilitated. Further, the above described phosphor layer sample has enough elasticity and flexibility, and therefore, there is no apprehension that it might be damaged or difficult in handing.
As described above, according to the present invention1 a part of the phosphor layer is formed into a sample of thin film, and therefore, the method of the present invention will greatly contribute, to carrying out conveniently and precisely the layer inspections (which are indispensable to the researches for the improvements of cathode ray tubes) such as inspections for:
a) shape of the phosphor particles;
b) bonding state of the phosphor particles;
c) thickness of the phosphor layer formed;
d) thickness of the filming layer; and
e) formation state of the black matrix.
Further, a permanent storage of the film is possible, and therefore, conveniences are provided in the handing, storage and maintenance of it.
Claims (4)
1. A sample preparing method for the phosphor layer of a cathode ray tube, comprising:
step of softening said phosphor layer adhered to a panel by heating and treating a proper chemical;
step of detaching said phosphor layer from said panel by applying another proper chemical;
step of cleaning said detached phosphor layer with pure water; and
step of heat-treating said cleaned phosphor layer at a certain temperature;
thereby forming a sample of phosphor layer in the form of a thin film.
2. The sample preparing method for the phosphor layer of a cathode ray tube as claimed in claim 1, wherein acetone is used as the softening for the softening step; and
hydrogen peroxide is used as the chemical for the phosphor layer detaching step.
3. The preparation of a sample of a phosphor layer on a cathode ray tube by chemically loosening at least a portion of the phosphor layer, and removing that portion, the removed portion being the sample.
4. A method of preparing a sample of the phosphor layer of a cathode ray tube substantially as hereinbefore described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019890009619A KR910006671B1 (en) | 1989-07-06 | 1989-07-06 | Method of picking the fluorescent film sample |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8926009D0 GB8926009D0 (en) | 1990-01-10 |
| GB2234064A true GB2234064A (en) | 1991-01-23 |
| GB2234064B GB2234064B (en) | 1992-12-02 |
Family
ID=19287852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8926009A Expired - Lifetime GB2234064B (en) | 1989-07-06 | 1989-11-17 | Sample preparing method for phosphor layer of cathode ray tube |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR910006671B1 (en) |
| GB (1) | GB2234064B (en) |
| MY (1) | MY105062A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2182585A (en) * | 1985-11-07 | 1987-05-20 | Sony Corp | Removing coatings from cathode ray tubes or parts thereof |
-
1989
- 1989-07-06 KR KR1019890009619A patent/KR910006671B1/en not_active IP Right Cessation
- 1989-11-16 MY MYPI89001602A patent/MY105062A/en unknown
- 1989-11-17 GB GB8926009A patent/GB2234064B/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2182585A (en) * | 1985-11-07 | 1987-05-20 | Sony Corp | Removing coatings from cathode ray tubes or parts thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR910006671B1 (en) | 1991-08-30 |
| MY105062A (en) | 1994-07-30 |
| GB2234064B (en) | 1992-12-02 |
| KR910003736A (en) | 1991-02-28 |
| GB8926009D0 (en) | 1990-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20011117 |