US5402926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brazing method using patterned metallic film having high wettability with respect to low-wettability brazing metal between components to be bonded together
Assignee: NGK Insulators Ltd
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Filing: 1993-09-28
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Granted: 1995-04-04
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Expires: 2013-09-28
Abstract
Abstract A method of brazing a plurality of components by heating the components superposed on each other with a brazing material interposed between adjacent bonding surfaces of the components, wherein the brazing material has a relatively low degree of wettability with respect to the material of the components to be brazed, and is applied to a patterned film of a high-wettability metal having a relatively high degree of wettability with respect to the brazing material, which film is formed on at least one of bonding surfaces of the components, so as to cover predetermined areas of the bonding surface while leaving adjacent non-bonding areas of the bonding surface uncovered so as to restrict the flow of brazing material.
Inventors
- 👤 Yukihisa Takeuchi
- 👤 Natsumi Shimogawa
- 👤 Nobuo Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:38
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
176 words
A method of brazing a plurality of components by heating the components superposed on each other with a brazing material interposed between adjacent bonding surfaces of the components, said method comprising the steps of: using a brazing material which has a relatively low degree of wettability with respect to the material of at least one of said plurality of components to be brazed; forming a patterned film of a high-wettability metal having a relatively high degree of wettability with respect to said brazing material, on the bonding surface of each of said at least one component, so as to cover predetermined bonding areas of said bonding surface of said each of said at least one component, thereby leaving non-bonding areas of said bonding surface, said non-bonding areas being not covered by said patterned film; and applying said brazing material to said patterned film of said high-wettability metal, so that at a brazing temperature the brazing material does not spread onto said non-bonding areas of said bonding surface of said each of said at least one component.
Claim 2
Independent Claim
176 words
A method of brazing a plurality of components by heating the components superposed on each other with a brazing material interposed between adjacent bonding surfaces of the components, said method comprising the steps of: using a brazing material which has a relatively low degree of wettability with respect to the material of at least one of said plurality of components to be brazed; forming a patterned film of a high-wettability metal having a relatively high degree of wettability with respect to said brazing material, on the bonding surface of each of said at least one component, so as to cover predetermined bonding areas of said bonding surface of said each of said at least one component, thereby leaving non-bonding areas of said bonding surface, said non-bonding areas being not covered by said patterned film; and applying said brazing material to said patterned film of said high-wettability metal, so that at a brazing temperature the brazing material does not spread onto said non-bonding areas of said bonding surface of said each of said at least one component.
Claim 3
Dependent Claim
25 words
A method according to claim 1, wherein said plurality of components are made of stainless steel, and said brazing material consists of a silver-brazing alloy.
Claim 4
Dependent Claim
14 words
A method according to claim 2, wherein said high-wettability metal consists of nickel (Ni).
Claim 5
Dependent Claim
25 words
A method according to claim 3, wherein said step of forming a patterned film of high-wettability metal comprises forming a film of nickel by electroplating.
Claim 6
Dependent Claim
60 words
A method according to claim 1, wherein said step of forming a patterned film of a high-wettability metal comprises applying protective films to non-bonded areas of said each bonding surface of said components, applying a film of said high-wettability metal to said each bonding surface, and removing said protective films to thereby form said patterned film of said high-wettability metal.
Claim 7
Dependent Claim
53 words
A method according to claim 1, wherein said step of applying said brazing material to said patterned film of said high-wettability metal consists of applying said brazing material in the form of a brazing sheet interposed between the patterned films of said high-wettability metal formed on the adjacent bonding surfaces of said components.
Claim 8
Dependent Claim
37 words
A method according to claim 1, wherein said step of applying said brazing material to said patterned film of said high-wettability metal consists of applying a paste of said brazing material by printing to said patterned film.
Claim 9
Dependent Claim
29 words
A method according to claim 1, wherein said plurality of components comprise a plurality of metallic planar members each having a plurality of openings formed through entire thicknesses thereof.
Claim 10
Dependent Claim
27 words
A method according to claim 8, wherein at least two planar members of said plurality of metallic planar members have corresponding holes which cooperate to define passageways.
Claim 11
Dependent Claim
47 words
A method according to claim 8, wherein said step of forming a patterned film of a high-wettability metal comprises applying said high-wettability metal to each bonding surface of said metallic planar members such that areas of said each bonding surface around edges of said openings are exposed.
Claim 12
Dependent Claim
74 words
A method according to claim 8, wherein said step of applying said brazing material to said patterned film of said high-wettability metal consists of applying said brazing material in the form of a brazing sheet (60) interposed between the patterned films of said high-wettability metal formed on the adjacent bonding surfaces of said components (42, 44, 46), said brazing sheet having openings corresponding to said plurality of openings formed through said metallic planar members.
Claim 13
Dependent Claim
33 words
A method according to claim 1, wherein said step of forming a patterned film of a high-wettability metal consists of forming said patterned film on each of the bonding surfaces of said components.
Claim 14
Independent Claim
189 words
A method of producing an ink-jet print head having a nozzle member and a pump member bonded to said nozzle member, said nozzle member including a plurality of stainless steel plates which are brazed together, comprising the steps of: using a brazing material which has a relatively low degree of wettability with respect to the material of at least one of said plurality of stainless steel plates to be brazed; forming a patterned film of a high-wettability metal having a relatively high degree of wettability with respect to said brazing material, on the bonding surface of each of said at least one stainless steel plate, so as to cover predetermined bonding areas of said bonding surface of said each of said at least one stainless steel plate, thereby leaving non-bonding areas of said bonding surface, said non-bonding areas being not covered by said patterned film; and applying said brazing material to said patterned film of said high-wettability metal, so that at a brazing temperature the brazing material does not spread onto said non-bonding areas of said bonding surface of said each of said at least one stainless steel plate.
Claim 15
Independent Claim
189 words
A method of producing an ink-jet print head having a nozzle member and a pump member bonded to said nozzle member, said nozzle member including a plurality of stainless steel plates which are brazed together, comprising the steps of: using a brazing material which has a relatively low degree of wettability with respect to the material of at least one of said plurality of stainless steel plates to be brazed; forming a patterned film of a high-wettability metal having a relatively high degree of wettability with respect to said brazing material, on the bonding surface of each of said at least one stainless steel plate, so as to cover predetermined bonding areas of said bonding surface of said each of said at least one stainless steel plate, thereby leaving non-bonding areas of said bonding surface, said non-bonding areas being not covered by said patterned film; and applying said brazing material to said patterned film of said high-wettability metal, so that at a brazing temperature the brazing material does not spread onto said non-bonding areas of said bonding surface of said each of said at least one stainless steel plate.
Claim 16
Independent Claim
189 words
A method of brazing a plurality of metallic planar members by heating the metallic planar members superposed on each other with a brazing material interposed between adjacent bonding surfaces of the metallic planar members, at least one metallic planar member having at least one opening formed through an entire thickness thereof, said method comprising the steps of: using a brazing material which has a relatively low degree of wettability with respect to the material of said at least one metallic planar member; forming a patterned film of a high-wettability metal having a relatively high degree of wettability with respect to said brazing material, on the bonding surface of each of said at least one metallic planar member, such that an area of said bonding surface of said each of said at least one metallic planar member around an edge of said at least one opening is left uncovered by said patterned film; and applying said brazing material to said patterned film of said high-wettability film, so that at a brazing temperature the brazing material does not spread onto said area around said edge of said at least one opening.
Claim 17
Independent Claim
189 words
A method of brazing a plurality of metallic planar members by heating the metallic planar members superposed on each other with a brazing material interposed between adjacent bonding surfaces of the metallic planar members, at least one metallic planar member having at least one opening formed through an entire thickness thereof, said method comprising the steps of: using a brazing material which has a relatively low degree of wettability with respect to the material of said at least one metallic planar member; forming a patterned film of a high-wettability metal having a relatively high degree of wettability with respect to said brazing material, on the bonding surface of each of said at least one metallic planar member, such that an area of said bonding surface of said each of said at least one metallic planar member around an edge of said at least one opening is left uncovered by said patterned film; and applying said brazing material to said patterned film of said high-wettability film, so that at a brazing temperature the brazing material does not spread onto said area around said edge of said at least one opening.
Claim 18
Dependent Claim
32 words
The method according to claim 14, wherein only said area of said bonding surface of said each of said at least one metallic planar member is left uncovered by said patterned film.
Claim 19
Dependent Claim
39 words
A method according to claim 14, wherein at least two planar members of said plurality of metallic planar members have corresponding holes as said at least one opening, said corresponding holes cooperating with each other to define a passageway.
Claim 20
Dependent Claim
30 words
A method according to claim 14, wherein each of said plurality of metallic planar members consists of a stainless steel plate, and said brazing material consists of a silver-brazing alloy.
Claim 21
Dependent Claim
17 words
A method according to claim 14, wherein said high-wettability metal of said patterned film consists of nickel.
Claim 22
Dependent Claim
51 words
A method according to claim 14, wherein said step of applying said brazing material to said patterned film comprises applying said brazing material in the form of a brazing sheet which has at least one opening corresponding to said at least one opening of said at least one metallic planar member.
Claim 23
Independent Claim
183 words
A method of brazing a plurality of metallic planar members by heating the metallic planar members superposed on each other with a brazing material interposed between adjacent bonding surfaces of the metallic planar members, at least one metallic planar member having at least one opening, said method comprising the steps of: using a brazing material which has a relatively low degree of wettability with respect to the material of said at least one metallic planar member; forming a patterned film of a high-wettability metal having a relatively high degree of wettability with respect to said brazing material, on the bonding surface of each of said at least one metallic planar member, such that an area of said bonding surface of said each of said at least one metallic planar member around an edge of said at least one opening is left uncovered by said patterned film; and applying said brazing material to said patterned film of said high-wettability film, so that at a brazing temperature the brazing material does not spread onto said area around said edge of said at least one opening.
Claim 24
Independent Claim
183 words
A method of brazing a plurality of metallic planar members by heating the metallic planar members superposed on each other with a brazing material interposed between adjacent bonding surfaces of the metallic planar members, at least one metallic planar member having at least one opening, said method comprising the steps of: using a brazing material which has a relatively low degree of wettability with respect to the material of said at least one metallic planar member; forming a patterned film of a high-wettability metal having a relatively high degree of wettability with respect to said brazing material, on the bonding surface of each of said at least one metallic planar member, such that an area of said bonding surface of said each of said at least one metallic planar member around an edge of said at least one opening is left uncovered by said patterned film; and applying said brazing material to said patterned film of said high-wettability film, so that at a brazing temperature the brazing material does not spread onto said area around said edge of said at least one opening.
Claim 25
Dependent Claim
32 words
The method according to claim 20, wherein only said area of said bonding surface of said each of said at least one metallic planar member is left uncovered by said patterned film.
Claim 26
Dependent Claim
25 words
A method according to claim 20, wherein said at least one opening comprises at least one opening formed through entire thickness of the corresponding component.
Claim 27
Dependent Claim
40 words
A method according to claim 22, wherein at least two metallic planar members of said plurality of metallic planar members have corresponding holes as said at least one opening, said corresponding holes cooperating with each other to define a passageway.
References Cited (Backward Citations)
US3110102A
Cited
US3330027A
Cited
JPS51107251A
Cited
JPS5251569A
Cited
JPS5352264A
Cited
JPS5426459A
Cited
JPS5480254A
Cited
JPS5758975A
Cited
US4530464A
Cited
JPS59219483A
Cited
US4603805A
Cited
US4960236A
Cited
JPH0217603A
Cited
US4875619A
Cited
US4972989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |