US3753710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ceramics
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1971-06-28
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Granted: 1973-08-21
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Expires: 1991-06-28
Abstract
Abstract Method for forming ceramics and more particularly for fabricating screens for colored television tubes comprising coating a cathode ray tube faceplate with a solid, lightsensitive organic layer capable of developing a Rd of 0.2 to 2.2, preferably a Rdp of 0.4 to 2.0; exposing said light-sensitive organic layer to actinic radiation in image-receiving manner to establish a potential Rd of 0.2 to 2.2; applying to said layer of organic material, free flowing phosphor particles having a diameter, along at least one axis of at least about 0.3 micron but less than 25 times the thickness of said organic layer; while the layer is at a temperature below the melting points of the phosphor powder and of the organic layer, physically embedding said phosphor particles as a monolayer in a stratum at the surface of said light-sensitive layer to yield an image having portions varying in density in proportion to the exposure of each portion; removing non-embedded particles from said organic layer to develop a discrete phosphor pattern, repeating said process to deposit a second phosphor and firing said faceplate to remove all of the organic material on the surface of the faceplate and fuse the phosphors to said faceplate. Ceramics may be processed in the same manner and in those cases where the ceramic pigment comprises a conductive metal, the technique can be employed to prepare ceramic circuit boards.
Inventors
- 👤 R Jones
- 👤 W Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:07
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/28; B; B82; B82Y; B82Y10/00; B82Y30/00; H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H05; H05K; H05K3/00; H05K3/10; H05K3/102; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K2203/00; H05K2203/05; H05K2203/0502; H05K2203/0525; H05K2203/11; H05K2203/1131
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
12 words
continuing the exposure to clear the background of said light-sensitive organic layer;
Claim 2
Dependent Claim
12 words
continuing the exposure to establish a potential Rd of 0.2 to 2.2;
Claim 3
Dependent Claim
12 words
continuing the expsoure to clear the background of said light-sensitive organic layer;
Claim 4
Independent Claim
36 words
The method of fabricating upon the concave surface of a faceplate of a cathode ray tube a screen bearing sets of discrete elements of at least two different colored light emitting phosphors affixed thereon which comprise:
Claim 5
Dependent Claim
12 words
continuing the exposure to establish a potential Rd of 0.2 to 2.2;
Claim 6
Dependent Claim
42 words
applying to said first layer of organic material, free flowing phosphor particles of a first color having a diameter along at least one axis of at least about 0.3 micron but less than 25 times the thickness of said first organic layer;
Claim 7
Dependent Claim
42 words
applying to said first layer of organic material, free flowing phosphor particles of a first color having a diameter along at least one axis of at least about 0.3 micron but less than 25 times the thickness of said first organic layer;
Claim 8
Dependent Claim
37 words
applying to said layer of organic material, free flowing fusible pigment particles having a diameter along at least one axis of at least about 0.3 micron but less than 25 times the thickness of said organic layer;
Claim 9
Dependent Claim
178 words
The process of claim 2 wherein said faceplate is coated after step 10 with a solid, light-sensitive organic layer having a thickness of at least 0.1 micron while maintaining the phosphors in image-wise configuration, said light-sensitive organic layer being capable of developing a Rdp of 0.2 to 2.2; exposing said light-sensitive organic layer to actinic radiation in image-receiving manner to clear the background of said light-sensitive organic layer; applying to said organic layer, free flowing phosphor particles of a third color having a diameter along at least one axis of at least 0.3 micron but less than 25 times the thickness of said organic layer; while the layer is at a temperatuere below the melting points of the phosphor particles and of the organic layer,physically embedding said phosphor particles as a monolayer at a stratum at the surface of said light-sensitive layer to yield an image having portions varying in density in proportion to the exposure of each portion; and removing non-embedded particles from said organic layer to develop a triad of three different colored light emitting phosphors.
Claim 10
Dependent Claim
37 words
applying to said layer of organic material, free flowing fusible pigment particles having a diameter along at least one axis of at least about 0.3 micron but less than 25 times the thickness of said organic layer;
Claim 11
Dependent Claim
54 words
while the element is at a temperature below the melting points of the pigment particles and of the organic layer; embedding said pigment particles as a monolayer in a stratum at the surface of said organic layer to yield an image having portions varying in density in proportion to the exposure of each portion;
Claim 12
Dependent Claim
26 words
The process of claim 2 wherein said faceplate is fired after step 5 fusing said first phosphor to said faceplace and removing said first organic layer.
Claim 13
Dependent Claim
55 words
while the ceramic article is at a temperature below the melting points of the pigment particles and of the organic layer, embedding said pigment particles as a monolayer in a stratum at the surface of said organic layer to yield an image having portions varying in density in proportion to the exposure of each portion;
Claim 14
Dependent Claim
56 words
while the element is at a temperature below the melting points of the phosphor particles and of the first organic layer, embedding said phosphor particles as a monolayer in a stratum at the surface of said first organic layer to yield an image having portions varying in density in proportion to the exposure of each portion;
Claim 15
Dependent Claim
56 words
while the element is at a temperature below the melting points of the phosphor particles and of the first organic layer, embedding said phosphor particles as a monolayer in a stratum at the surface of said first organic layer to yield an image having portions varying in density in proportion to the exposure of each portion;
Claim 16
Dependent Claim
14 words
removing non-embedded phosphor particles from said first organic layer to develop a phosphor pattern;
Claim 17
Dependent Claim
14 words
removing non-embedded phosphor particles from said first organic layer to develop a phosphor pattern;
Claim 18
Dependent Claim
14 words
removing non-embedded pigment particles from said organic layers to develop a pigmented image; and
Claim 19
Dependent Claim
14 words
removing non-embedded pigment particles from said organic layer to develop a pigmented image; and
Claim 20
Dependent Claim
22 words
The process of claim 2 wherein said faceplate is coated after step 5 with a hydrophilic colloid to form an isolating layer.
Claim 21
Dependent Claim
25 words
The process of claim 5 wherein said isolating layer contains a tanning agent and said isolating layer is tanned uniformly by exposure to actinic radiation.
Claim 22
Dependent Claim
23 words
firing said ceramic article to fuse any unfused fusible pigment to said ceramic article and remove any organic material on said ceramic article.
Claim 23
Dependent Claim
23 words
firing said ceramic article to fuse any unfused fusible pigment to said ceramic article and remove any organic material on said ceramic article.
Claim 24
Dependent Claim
43 words
coating said element with a second solid, light-sensitive organic layer having a thickness of at least 0.1 micron while maintaining said first phosphor pattern in its image-wise configuration, saId second light-sensitive organic layer being capable of developing a Rdp of 0.2 to 2.2;
Claim 25
Dependent Claim
43 words
coating said element with a second solid, light-sensitive organic layer having a thickness of at least 0.1 micron while maintaining said first phosphor pattern in its image-wise configuration, said second light-sensitive organic layer being capable of developing a Rd of 0.2 to 2.2;
Claim 26
Dependent Claim
21 words
exposing said second light-sensitive organic layer to actinic radiation in image-receiving manner to establish a potential Rd of 0.2 to 2.2;
Claim 27
Dependent Claim
21 words
exposing said second light-sensitive organic layer to actinic radiation in image-receiving manner to clear the background of said light-sensitive organic layer;
Claim 28
Dependent Claim
31 words
The process of claim 2 wherein said solid, light-sensitive organic layer is applied in step 6 from a liquid vehicle, which is a poor solvent for said first light-sensitive organic layer.
Claim 29
Dependent Claim
30 words
The process of claim 2, wherein said solid, light-sensitive organic layer applied to step 6 comprises a film-forming organic material containing no terminal ethylenically unsaturation and at least one photo-activator.
Claim 30
Dependent Claim
41 words
applying to said second layer of organic material, free flowing phosphor particles of a second color having a diameter along at least one axis of at least 0.3 micron but less than 25 times the thickness of said second organic layer;
Claim 31
Dependent Claim
41 words
applying to said second layer of organic material, free flowing phosphor particles of a second color having a diameter along at least one axis of at least 0.3 micron but less than 25 times the thickness of said second organic layer;
Claim 32
Dependent Claim
57 words
while the element is at a temperature below the melting points of the second phosphor particles and of the second organic layer, embedding said phosphor particles as a monolayer in a stratum at the surface of said second light-sensitive layer to yield an image having portions varying in density in proportion to the exposure of each portion;
Claim 33
Dependent Claim
57 words
while the element is at a temperature below the melting points of the second phosphor particles and of the second organic layer, embedding said phosphor particles as a monolayer in a stratum at the surface of said second light-sensitive layer to yield an image having portions varying in density in proportion to the exposure of each portion;
Claim 34
Dependent Claim
17 words
The process of claim 8 wherein said solid, film-forming organic material comprises an internally ethylenically unsaturated acid.
Claim 35
Dependent Claim
17 words
The process of claim 9 wherein said solid, film-forming organic material comprises a partially hydrogenated rosin acid.
Claim 36
Dependent Claim
15 words
removing embedded phosphor particles from said second organic layer to develop a phosphor pattern; and
Claim 37
Dependent Claim
15 words
removing non-embedded phosphor particles from said second organic layer to develop a phosphor pattern; and
Claim 38
Dependent Claim
24 words
firing said faceplate to remove all of the organic material on the surface of the faceplate and fusing any unfused phosphors to said faceplate.
Claim 39
Dependent Claim
25 words
firing said face plate to remove all of the organic material on the surface of the faceplate and fusing any unfused phosphors to said faceplate.
Claim 40
Dependent Claim
19 words
The process of claim 8 wherein said solid-film-forming organic material comprises an ester of an internally ethylenically unsaturated acid.
Claim 41
Dependent Claim
14 words
The process of claim 11 wherein said ester comprises a partially hydrogenated rosin ester.
Claim 42
Dependent Claim
11 words
The process of claim 11 wherein said ester comprises a phosphatide.
Claim 43
Independent Claim
9 words
The method of forming a ceramic article which comprises:
Claim 44
Independent Claim
9 words
The method of forming a ceramic article which comprises:
Claim 45
Dependent Claim
174 words
The process of claim 15 wherein said ceramic article is coated before step 6 with a second solid, light-sensitive organic layer having a thickness of at least 0.1 micron while maintaining the first pigment in image-wise configuration, said second light-sensitive organic layer being capable of developing a Rdp of 0.2 to 2.2; exposing said light-sensitive organic layer to actinic radiation in image-receiving manner to clear the background of said light sensitive organic layer; applying to said organic layer, free flowing fusiable pigment particles of a second color having a diameter along at least one axis of at least 0.3 micron but less than 25 times the thickness of said organic layer; while the layer is at a temperature below the melting points of the pigment particles and of the organic layer, physically embedding said pigment particles as a monolayer at a stratum at the surface of said light-sensitive layer to yield an image having portions varying in density in porportion to the exposure of each portion; and removing non-embedded particles from said organic layer.
Claim 46
Dependent Claim
13 words
The process of claim 14, wherein said fusible pigment comprises a conductive metal.
Claim 47
Dependent Claim
18 words
The process of claim 17, wherein after step 5, said conductive image is overcoated with a passivating layer.
Claim 48
Dependent Claim
182 words
The process of claim 17, wherein after step 5, said conductive metal image is overcoating with a passivating layer; said ceramic article is coated with a second solid, light-sensitive organic layer having a thickness of at least 0.1 micron while maintaining the first conductive metal image in image-wise configuration, said second light-sensitive organic layer being capable of developing a Rdp of 0.2 to 2.2; exposing said light-sensitive organic layer to actinic radiation in image-receiving manner to clear the background of saiD light-sensitive organic layer; applying to said organic layer, free-flowing conductive metal pigment particles having a diameter along at least one axis of at least 0.3 micron but less than 25 times the thickness of said organic layer; while the layer is at a temperature below the melting points of the pigment particles and of the organic layer, physically embedding said conductive metal particles as a monolayer at a stratum at the surface of said light-sensitive layer to yield an image having portion varying in density in proportion to the exposure of each portion; and removing non-embedded particles from said organic layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |