US2296616A - Electrolytic process of making photosensitive mosaic screens - Google Patents
Electrolytic process of making photosensitive mosaic screens Download PDFInfo
- Publication number
- US2296616A US2296616A US254070A US25407039A US2296616A US 2296616 A US2296616 A US 2296616A US 254070 A US254070 A US 254070A US 25407039 A US25407039 A US 25407039A US 2296616 A US2296616 A US 2296616A
- Authority
- US
- United States
- Prior art keywords
- silver
- electrolytic process
- mosaic
- screens
- making photosensitive
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 12
- 229910052709 silver Inorganic materials 0.000 description 12
- 239000004332 silver Substances 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 230000001235 sensitizing effect Effects 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
- H01J40/02—Details
- H01J40/04—Electrodes
- H01J40/06—Photo-emissive cathodes
-
- 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
- H01J29/36—Photoelectric screens; Charge-storage screens
- H01J29/39—Charge-storage screens
- H01J29/43—Charge-storage screens using photo-emissive mosaic, e.g. for orthicon, for iconoscope
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12361—All metal or with adjacent metals having aperture or cut
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12583—Component contains compound of adjacent metal
- Y10T428/1259—Oxide
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12896—Ag-base component
Definitions
- My invention relates to photo-sensitive mosaic electrode structures or screens of the type used in cathode ray transmitter tubes employed in the television art. Broadly, the function of such tubes whereby an optical image thrown on the mosaic screen is scanned by the cathode ray of the tube and electrical impulses are produced corresponding to the light and shade of the image is now too well known to require a description thereof.
- One object of my invention is to provide an improved and inexpensive process for the manufacture of the mosaic electrodes or screens for such tubes. Another object is the provision of the improved construction of the mosaic electrode or screen which results from that process.
- Fig. 1 is a perspective view drawn to an enlarged scale oi! a mosaic electrode or screen constructed in accordance with my invention and Fig. 2 is a cross section of a fragmentary portion thereof drawn to a still larger scale.
- the mosaic electrode or mosaic screen as I prefer to call it has a conducting base comprising the aluminum plate I in contradistinction to other-well known forms of such screens having insulating bases.
- On a face of this plate I electrolytically oxidize a film represented at 2.
- the aluminum oxide film thus produced presumably is of uniform thickness, the thickness being easily controlled, but I may find it desirable' for the purpose of obtaining certain particular effects to produce a film of a variable thickness.
- the process of forming a photo-sensitive mosaic screen which comprises electrolytically oxidizing the surface of an aluminum base plate, depositing silver on the oxide, heating the base plate to a temperature of the order of 400 C. to cause the oxide and the silver deposit thereon to separate into discrete islands and finally sensitizing the silver with a photo-sensitive material.
- the process of forming a photo-sensitive mosaic screen which comprises electrolytically producing an oxide film on an aluminum plate, sputtering a silver film on the oxide film, heating the plate and films to cause the oxide film to crack into small segregated islands and finally sensitizing the silver film with a photo-sensitive material.
Description
p 1942. R. KOLLER 2,296,616
ELECTROLYTIC PROCESS OF MAKING A PHOTO-SENSITIVE MOSAIC SCREEN Filed Feb. 1, 1939 SEIVJIT/Z/A/G SILVER LAYER 0/- 046670 J 4 j ALUMINUM 0x/a-- N Q L\\ I l ,1 O
Ihventor: Lewis R. Koller,
b fl j d y His Attorhey.
Patented Sept. 22, 1942 ELECTROLYTIC PROCESS OF MAKING PHO- TOSENSITIVE MOSAIC SCREENS Lewis B. Koller, Schenectady, N. Y., assignor to General Electric Company, a corporation of New York v Application February 1, 1939, Serial No. 254,070
3 Claims.
My invention relates to photo-sensitive mosaic electrode structures or screens of the type used in cathode ray transmitter tubes employed in the television art. Broadly, the function of such tubes whereby an optical image thrown on the mosaic screen is scanned by the cathode ray of the tube and electrical impulses are produced corresponding to the light and shade of the image is now too well known to require a description thereof.
One object of my invention is to provide an improved and inexpensive process for the manufacture of the mosaic electrodes or screens for such tubes. Another object is the provision of the improved construction of the mosaic electrode or screen which results from that process.
My invention will be better understood from the following description taken in connection with the accompanying drawing and its scope will be pointed out in the appended claims.
Referring to the drawing, Fig. 1 is a perspective view drawn to an enlarged scale oi! a mosaic electrode or screen constructed in accordance with my invention and Fig. 2 is a cross section of a fragmentary portion thereof drawn to a still larger scale.
The mosaic electrode or mosaic screen as I prefer to call it has a conducting base comprising the aluminum plate I in contradistinction to other-well known forms of such screens having insulating bases. On a face of this plate I electrolytically oxidize a film represented at 2. The aluminum oxide film thus produced presumably is of uniform thickness, the thickness being easily controlled, but I may find it desirable' for the purpose of obtaining certain particular effects to produce a film of a variable thickness. I coat the aluminum oxide film with silver shown at 3, for example by sputtering a silver film thereon and I then heat the aluminum plate with the film thereon to a temperature of the order of 400 C. As a result of this heat treatment a network of cracks represented at 4 is formed in the aluminum oxide film thereby producing a myriad of discrete islands 5 having diameters of the order of one one-thousandth of an inch. Finally, the silver on the tops of the islands thus formed is sensitized, for example with caesium.-
In a screen constructed'in accordance with my invention it will'be seen that the spaces between the elements of the mosaic are bridged by a metallic conductor and hence will be at a deiinitely controlled potential. As a result a more uniform field distribution is obtained than is possible withcertain well known forms of screens having silver globules on a mica background.
What I claim as new and desire to secure by Letters Patent of the United States is:
1. The process of forming a photo-sensitive mosaic screen which comprises electrolytically oxidizing an aluminum base, producing a silver coating on the oxide, heating the base member to cause the oxide thereon to become separated into discrete islands and sensitizing the silver with a photo-sensitive material.
2. The process of forming a photo-sensitive mosaic screen which comprises electrolytically oxidizing the surface of an aluminum base plate, depositing silver on the oxide, heating the base plate to a temperature of the order of 400 C. to cause the oxide and the silver deposit thereon to separate into discrete islands and finally sensitizing the silver with a photo-sensitive material.
3. The process of forming a photo-sensitive mosaic screen which comprises electrolytically producing an oxide film on an aluminum plate, sputtering a silver film on the oxide film, heating the plate and films to cause the oxide film to crack into small segregated islands and finally sensitizing the silver film with a photo-sensitive material.
LEWIS R. KOLLER.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US254070A US2296616A (en) | 1939-02-01 | 1939-02-01 | Electrolytic process of making photosensitive mosaic screens |
| DEL99985D DE726874C (en) | 1939-02-01 | 1940-01-27 | Process for the production of photosensitive mosaic screens |
| GB1819/40A GB534343A (en) | 1939-02-01 | 1940-01-30 | Improvements in and relating to photo-sensitive electrode structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US254070A US2296616A (en) | 1939-02-01 | 1939-02-01 | Electrolytic process of making photosensitive mosaic screens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2296616A true US2296616A (en) | 1942-09-22 |
Family
ID=22962814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US254070A Expired - Lifetime US2296616A (en) | 1939-02-01 | 1939-02-01 | Electrolytic process of making photosensitive mosaic screens |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2296616A (en) |
| DE (1) | DE726874C (en) |
| GB (1) | GB534343A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2588019A (en) * | 1946-06-05 | 1952-03-04 | Rca Corp | Monoscope target for pickup tubes |
| US2668936A (en) * | 1948-05-26 | 1954-02-09 | Sprague Electric Co | Electrical condenser |
| US2780591A (en) * | 1953-11-06 | 1957-02-05 | Oakite Prod Inc | Decorative metal plating |
| US2805986A (en) * | 1952-01-11 | 1957-09-10 | Harold B Law | Method of making fine mesh screens |
| US3189420A (en) * | 1962-10-01 | 1965-06-15 | Paul R Gould | Electrically conductive element |
| US3254006A (en) * | 1961-06-15 | 1966-05-31 | Sylvania Electric Prod | Method of making a cold cathode |
| US3380156A (en) * | 1965-11-15 | 1968-04-30 | Trw Inc | Method of fabricating thin film resistors |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE786084A (en) * | 1971-07-10 | 1973-01-10 | Philips Nv | LUMINESCENT SCREEN WITH MOSAIC STRUCTURE |
| US3798477A (en) * | 1972-08-03 | 1974-03-19 | Tektronix Inc | Storage tube with target having conductive surface exposed through random cracks in dielectric coating |
| FR2514947A1 (en) * | 1981-10-16 | 1983-04-22 | Hyperelec | Image quality enhancement technique for colour light intensifiers - uses disordered arrangement of luminous phosphor receptors to prevent Moire fringe image patterning |
-
1939
- 1939-02-01 US US254070A patent/US2296616A/en not_active Expired - Lifetime
-
1940
- 1940-01-27 DE DEL99985D patent/DE726874C/en not_active Expired
- 1940-01-30 GB GB1819/40A patent/GB534343A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2588019A (en) * | 1946-06-05 | 1952-03-04 | Rca Corp | Monoscope target for pickup tubes |
| US2668936A (en) * | 1948-05-26 | 1954-02-09 | Sprague Electric Co | Electrical condenser |
| US2805986A (en) * | 1952-01-11 | 1957-09-10 | Harold B Law | Method of making fine mesh screens |
| US2780591A (en) * | 1953-11-06 | 1957-02-05 | Oakite Prod Inc | Decorative metal plating |
| US3254006A (en) * | 1961-06-15 | 1966-05-31 | Sylvania Electric Prod | Method of making a cold cathode |
| US3189420A (en) * | 1962-10-01 | 1965-06-15 | Paul R Gould | Electrically conductive element |
| US3380156A (en) * | 1965-11-15 | 1968-04-30 | Trw Inc | Method of fabricating thin film resistors |
Also Published As
| Publication number | Publication date |
|---|---|
| GB534343A (en) | 1941-03-05 |
| DE726874C (en) | 1942-10-22 |
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