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US3720535A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for applying a non-self-supporting metal layer atop a plate surface

Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1971-03-15
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Granted: 1973-03-13
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Expires: 1991-03-15
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Abstract

Abstract The process of coating or placing a fragile thin non-selfsupporting metal layer upon a surface of a flat platelike body, such as a microchannel plate as disclosed comprises the steps of placing a thin self-supporting layer of lacquer upon the surface of the platelike body, thereupon depositing over and atop said lacquer layer a sufficient metal to the desired thickness, suitably by vacuum deposition techniques, to form a layer of the metal, and then placing the entire structure in an oven to bake off the lacquer in an air atmosphere and allow the thin non-selfsupporting metal layer to settle against the end surface of the plate. An additional process provides for the formation of the lacquer layer in which the plate remains dry by spreading liquid lacquer over the surface of a fluid in which is submerged a support ring, allowing the lacquer to harden, draining the fluid to permit the lacquer to drape over the support ring, removing the latter assembly and applying the lacquer layer to the platelike body.

Inventors

  • 👤 H Parish
  • 👤 B Einstein

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 15:40
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J43/246; C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/20

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 339 words
The improved method of positioning a very thin non-self-supporting layer of a given composition upon a surface of a body of a different composition, said given composition being of such physical characteristics that it vaporizes at a higher temperature than another material, lacquer, comprising the steps of: a. submerging a support ring in a fluid confined within a fluid reservoir, said support ring comprising a rim portion bordering an open space, b. depositing a lacquer in liquid form upon the surface of said fluid to form on said fluid surface a first layer of a predetermined thickness, c. permitting said lacquer to stand for a predetermined period of time whereby said lacquer changes to a solid state and forms a self-supporting layer, d. draining said reservoir to gradually reduCe the fluid level therein beneath the level of said support ring whereby said lacquer layer rides down with said fluid and a portion thereof settles down upon said support ring and drapes across the opening in said support ring, e. removing said support ring and supported lacquer layer from said reservoir, f. manipulating said support ring so that said lacquer layer is in contact with the surface of said body whereby said lacquer layer adheres to said surface, g. detaching and removing said support ring so as to leave said lacquer layer on said surface, h. inserting said body and attached lacquer layer into a vacuum deposition chamber and depositing upon said lacquer layer a very thin non-self-supporting second layer of said given composition, i. thereafter placing said body and supported lacquer layer and second layer in an oven, j. baking said body and supported layers in said oven in an air atmosphere at a predetermined temperature and for a predetermined time to bake off said lacquer layer without baking off said second layer whereby said second non-self-supporting layer settles down onto said surface of said body, wherein said non-self-supporting layer of said given composition is positioned on said surface without the necessity of immersing said body in said fluid.
Claim 2
Dependent Claim 339 words
The improved method of positioning a very thin non-self-supporting layer of a given composition upon a surface of a body of a different composition, said given composition being of such physical characteristics that it vaporizes at a higher temperature than another material, lacquer, comprising the steps of: a. submerging a support ring in a fluid confined within a fluid reservoir, said support ring comprising a rim portion bordering an open space, b. depositing a lacquer in liquid form upon the surface of said fluid to form on said fluid surface a first layer of a predetermined thickness, c. permitting said lacquer to stand for a predetermined period of time whereby said lacquer changes to a solid state and forms a self-supporting layer, d. draining said reservoir to gradually reduCe the fluid level therein beneath the level of said support ring whereby said lacquer layer rides down with said fluid and a portion thereof settles down upon said support ring and drapes across the opening in said support ring, e. removing said support ring and supported lacquer layer from said reservoir, f. manipulating said support ring so that said lacquer layer is in contact with the surface of said body whereby said lacquer layer adheres to said surface, g. detaching and removing said support ring so as to leave said lacquer layer on said surface, h. inserting said body and attached lacquer layer into a vacuum deposition chamber and depositing upon said lacquer layer a very thin non-self-supporting second layer of said given composition, i. thereafter placing said body and supported lacquer layer and second layer in an oven, j. baking said body and supported layers in said oven in an air atmosphere at a predetermined temperature and for a predetermined time to bake off said lacquer layer without baking off said second layer whereby said second non-self-supporting layer settles down onto said surface of said body, wherein said non-self-supporting layer of said given composition is positioned on said surface without the necessity of immersing said body in said fluid.
Claim 3
Dependent Claim 326 words
The improved method of positioning a very thin non-self-supporting layer of aluminum upon a surface of a microchannel plate without immersing said microchannel plate in water, comprising the steps of: a. submerging a support ring in de-ionized water confined within a water reservoir, said support ring comprising a rim portion bordering an open space, b. depositing lacquer in liquid form upon the surface of said water to form upon said water surface a first layer of a predetermined thickness, c. permitting said lacquer to stand for a predetermined period of time whereby said lacquer changes to a solid state and forms a self-supporting layer, d. draining said reservoir to gradually reduce the water level therein beneath the level of said support ring whereby said lacquer layer rides down with said water and a portion thereof settles down upon said support ring and drapes across the opening in said support ring, e. removing said support ring and supported lacquer layer from said reservoir, f. manipulating said support ring so that said lacquer layer is in contact with the surface of the microchannel plate whereby said lacquer layer adheres to said surface, g. detaching and removing said support ring so as to leave said lacquer layer on said surface, h. inserting said microchannel plate and attached lacquer layer into a vacuum deposition chamber and depositing atop said lacquer layer a very thin non-self-supporting second layer of aluminum, i. thereafter placing said microchannel plate with said supported lacquer layer and aluminum layer in an oven, j. baking said body and supported layers in said oven in an air atmosphere at a predetermined temperature and for a predetermined time to bake off said lacquer layer without baking off said aluminum layer whereby said second non-self-supporting aluminum layer settles down onto said surface of said microchannel plate, wherein said non-self-supporting aluminum layer is positioned on said surface of the microchannel plate without the necessity of immersing said plate in said water.
Claim 4
Dependent Claim 326 words
The improved method of positioning a very thin non-self-supporting layer of aluminum upon a surface of a microchannel plate without immersing said microchannel plate in water, comprising the steps of: a. submerging a support ring in de-ionized water confined within a water reservoir, said support ring comprising a rim portion bordering an open space, b. depositing lacquer in liquid form upon the surface of said water to form upon said water surface a first layer of a predetermined thickness, c. permitting said lacquer to stand for a predetermined period of time whereby said lacquer changes to a solid state and forms a self-supporting layer, d. draining said reservoir to gradually reduce the water level therein beneath the level of said support ring whereby said lacquer layer rides down with said water and a portion thereof settles down upon said support ring and drapes across the opening in said support ring, e. removing said support ring and supported lacquer layer from said reservoir, f. manipulating said support ring so that said lacquer layer is in contact with the surface of the microchannel plate whereby said lacquer layer adheres to said surface, g. detaching and removing said support ring so as to leave said lacquer layer on said surface, h. inserting said microchannel plate and attached lacquer layer into a vacuum deposition chamber and depositing atop said lacquer layer a very thin non-self-supporting second layer of aluminum, i. thereafter placing said microchannel plate with said supported lacquer layer and aluminum layer in an oven, j. baking said body and supported layers in said oven in an air atmosphere at a predetermined temperature and for a predetermined time to bake off said lacquer layer without baking off said aluminum layer whereby said second non-self-supporting aluminum layer settles down onto said surface of said microchannel plate, wherein said non-self-supporting aluminum layer is positioned on said surface of the microchannel plate without the necessity of immersing said plate in said water.
Claim 5
Dependent Claim 48 words
The invention as defined in claim 2 further comprising connecting a vacuum pump to one surface of said microchannel plate for creating a suction force on the other surface, the surface on which said lacquer layer is placed, to assist attaching said lacquer layer to said plate surface.
Claim 6
Dependent Claim 347 words
The improved method of positioning a very thin non-self-supporting layer of a given composition upon a surface of a microchannel plate, which avoids immersion of said plate in a fluid, said given composition being of such physical characteristics that it vaporizes at a higher temperature than another mateRial, lacquer, comprising the steps of: a. submerging a support ring in a fluid confined within a fluid reservoir, said support ring comprising a rim portion bordering an open space, b. depositing a lacquer in liquid form upon the surface of said fluid to form a first layer of a predetermined thickness, c. permitting said lacquer to stand for a predetermined period of time whereby said lacquer changes to a solid state and forms a self-supporting layer, d. draining said reservoir to gradually reduce the fluid level therein beneath the level of said support ring whereby said lacquer layer rides down with said fluid and a portion thereof settles down upon said support ring and drapes across the opening in said support ring, e. removing said support ring and supported lacquer layer from said reservoir, f. manipulating said support ring so that said lacquer layer is in contact with the surface of said microchannel plate whereby said lacquer layer adheres to said surface, g. detaching and removing said support ring so as to leave said lacquer layer on said surface, h. inserting said microchannel plate and attached lacquer layer into a vacuum deposition chamber and depositing upon said lacquer layer a very thin non-self-supporting second layer of said given composition, i. thereafter placing said microchannel plate and supported lacquer layer and second layer in an oven, j. baking said microchannel plate and supported layers in said oven in an air atmosphere at a predetermined temperature and for a predetermined time to bake off said lacquer layer without baking off said second layer whereby said second non-self-supporting layer settles down onto said surface of said microchannel plate, wherein said non-self-supporting layer of said given composition is positioned on said surface without the necessity of immersing said microchannel plate in said fluid.
Claim 7
Dependent Claim 347 words
The improved method of positioning a very thin non-self-supporting layer of a given composition upon a surface of a microchannel plate, which avoids immersion of said plate in a fluid, said given composition being of such physical characteristics that it vaporizes at a higher temperature than another mateRial, lacquer, comprising the steps of: a. submerging a support ring in a fluid confined within a fluid reservoir, said support ring comprising a rim portion bordering an open space, b. depositing a lacquer in liquid form upon the surface of said fluid to form a first layer of a predetermined thickness, c. permitting said lacquer to stand for a predetermined period of time whereby said lacquer changes to a solid state and forms a self-supporting layer, d. draining said reservoir to gradually reduce the fluid level therein beneath the level of said support ring whereby said lacquer layer rides down with said fluid and a portion thereof settles down upon said support ring and drapes across the opening in said support ring, e. removing said support ring and supported lacquer layer from said reservoir, f. manipulating said support ring so that said lacquer layer is in contact with the surface of said microchannel plate whereby said lacquer layer adheres to said surface, g. detaching and removing said support ring so as to leave said lacquer layer on said surface, h. inserting said microchannel plate and attached lacquer layer into a vacuum deposition chamber and depositing upon said lacquer layer a very thin non-self-supporting second layer of said given composition, i. thereafter placing said microchannel plate and supported lacquer layer and second layer in an oven, j. baking said microchannel plate and supported layers in said oven in an air atmosphere at a predetermined temperature and for a predetermined time to bake off said lacquer layer without baking off said second layer whereby said second non-self-supporting layer settles down onto said surface of said microchannel plate, wherein said non-self-supporting layer of said given composition is positioned on said surface without the necessity of immersing said microchannel plate in said fluid.
Claim 8
Dependent Claim 48 words
The invention as defined in claim 4 further comprising connecting a vacuum pump to one surface of said microchannel plate for creating a suction force on the other surface, the surface on which said lacquer layer is placed, to assist attaching said lacquer layer to said plate surface.
Claim 9
Independent Claim 200 words
The method of coupling a very thin non-self-supporting layer of metal upon the surface of a microcapillary multiplier matrix comprising the steps of: forming a thin self-supporting layer of lacquer material, including the steps of placing a support ring in a crystallizing dish and submerging said support ring therein in de-ionized water so as to form a floating layer of lacquer, gradually draining said crystallizing dish so that said lacquer layer moves downward and drapes across said support ring to form thereon the desired lacquer layer; placing said lacquer layer on the surface of said matrix; forming a thin non-self-supporting layer of metal material on top of said lacquer layer, including the steps of placing said microcapillary multiplier matrix and supported lacquer layer in a bell jar, exhausting said bell jar of air to form a vacuum region thereon, and depositing by vapor deposition said metal layer on top of said lacquer layer; and baking said assembly of said matrix and layers in an air atmosphere at a predetermined temperature for a predetermined period of time so as to bake off said lacquer layer without baking off said metal layer; whereby said non-self-supporting metal layer settles onto said matrix surface.
Claim 10
Independent Claim 200 words
The method of coupling a very thin non-self-supporting layer of metal upon the surface of a microcapillary multiplier matrix comprising the steps of: forming a thin self-supporting layer of lacquer material, including the steps of placing a support ring in a crystallizing dish and submerging said support ring therein in de-ionized water so as to form a floating layer of lacquer, gradually draining said crystallizing dish so that said lacquer layer moves downward and drapes across said support ring to form thereon the desired lacquer layer; placing said lacquer layer on the surface of said matrix; forming a thin non-self-supporting layer of metal material on top of said lacquer layer, including the steps of placing said microcapillary multiplier matrix and supported lacquer layer in a bell jar, exhausting said bell jar of air to form a vacuum region thereon, and depositing by vapor deposition said metal layer on top of said lacquer layer; and baking said assembly of said matrix and layers in an air atmosphere at a predetermined temperature for a predetermined period of time so as to bake off said lacquer layer without baking off said metal layer; whereby said non-self-supporting metal layer settles onto said matrix surface.
Claim 11
Dependent Claim 81 words
The invention as defined in claim 6 wherein the step of placing said lacquer layer on said matrix comprises further the steps of placing said matrix on a hollow support collar; operating and maintaining a vacuum on the bottom surface of said matrix so as to create a sucking action at the top surface thereof; inverting said support ring and moving same into said collar so as to place said lacquer layer in contact with said upper surface of said matrix.

References Cited (Backward Citations)

US2689982A Cited
US2749252A Cited
US2686734A Cited
US3067055A Cited
US3404025A Cited
US3582389A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-03-12 1976-09-11 1977-03-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-12 1980-09-11 1981-03-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-12 1984-09-11 1985-03-13 $7700.00 Window Closed / Lapsed

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