US4420110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-wetting articles and method for soldering operations
Assignee: Air Products and Chemicals Inc
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Filing: 1981-10-05
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Granted: 1983-12-13
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Expires: 2001-10-05
Abstract
Abstract A method providing for the non-wetting of predetermined portions of articles exposed to molten filler metals during soldering or brazing operations wherein predetermined areas of said elements are provided with a layer of chemical vapor deposited titanium carbide with an overlayer of titanium nitride or with a layer of titanium diboride to resist wetting of the coated areas by the filler metals. Articles coated by the non-wetting titanium compounds include circuit board support brackets and other elements used in immersion soldering machines, and heating elements for soldering operations such as soldering tips for various types of heated soldering tools and the like.
Inventors
- 👤 Allan W. McCullough
- 👤 Richard A. Springer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:46
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/224; B23K3/00; B23K3/02; B23K3/025; B23K3/08; B23K3/087; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
A method for preventing the coating of a metal article with a filler metal such as solder or braze metal, which article when exposed to said filler metal in a molten condition of said filler metal is normally wetted with a coating of said filler metal, said method comprising the steps of applying a layer of a titanium compound selected from a group which includes titanium carbide, titanium nitride and titanium diboride to the surface of said article prior to exposing said article to said filler metal.
Claim 2
Independent Claim
87 words
A method for preventing the coating of a metal article with a filler metal such as solder or braze metal, which article when exposed to said filler metal in a molten condition of said filler metal is normally wetted with a coating of said filler metal, said method comprising the steps of applying a layer of a titanium compound selected from a group which includes titanium carbide, titanium nitride and titanium diboride to the surface of said article prior to exposing said article to said filler metal.
Claim 3
Dependent Claim
31 words
The method set forth in claim 1 wherein: said method includes the step of applying said layer by chemical vapor deposition of said titanium compound on the surface of said article.
Claim 4
Dependent Claim
20 words
The method set forth in claim 1 together with the step of: providing said metal article of low carbon steel.
Claim 5
Dependent Claim
18 words
The method set forth in claim 1 together with the step of: providing said article of stainless steel.
Claim 6
Dependent Claim
37 words
The method set forth in claim 3 or 4 wherein: said method includes the steps of applying a layer of titanium carbide directly on said article followed by applying a layer of titanium nitride to said article.
Claim 7
Dependent Claim
19 words
The method set forth in claim 1 together with the step of: providing said article of a copper alloy.
Claim 8
Dependent Claim
30 words
The method set forth in claim 6 wherein: the step of applying said titanium compound comprises applying only a layer of titanium diboride at a temperature less than 1000° C.
Claim 9
Dependent Claim
45 words
The method set forth in claim 7 wherein: the step of applying titanium diboride to said article includes mixing gaseous hydrogen, titanium tetrachloride, and boron trichloride in the presence of said articles disposed in a closed chamber and at a temperature of approximately 700° C.
Claim 10
Dependent Claim
66 words
An element which is heated to the melting point of a filler metal such as solder and is exposed to direct contact with said filler metal, said element being provided with a coating of a vapor deposited layer of a titanium compound including at least one layer of titanium carbide, titanium nitride or titanium diboride to resist being coated by said filler metal upon contact therewith.
Claim 11
Dependent Claim
66 words
An element which is heated to the melting point of a filler metal such as solder and is exposed to direct contact with said filler metal, said element being provided with a coating of a vapor deposited layer of a titanium compound including at least one layer of titanium carbide, titanium nitride or titanium diboride to resist being coated by said filler metal upon contact therewith.
Claim 12
Dependent Claim
58 words
The element set forth in claim 9 comprising: a soldering tip having a shank portion for mounting said soldering tip in the bore of a heating element of a soldering tool, and a working tip end portion for contacting the filler metal, at least said working tip end portion being covered by a layer of said titanium compound.
Claim 13
Dependent Claim
29 words
The element set forth in claim 10 wherein: said element comprises a wrought copper alloy having a working end coated with a layer of chemical vapor deposited titanium diboride.
Claim 14
Dependent Claim
34 words
The element set forth in claim 11 wherein: said coating is provided by mixing gaseous hydrogen, titanium tetrachloride, and boron trichloride in the presence of said element at a temperature of approximately 700° C.
References Cited (Backward Citations)
US2473887A
Cited
US3432915A
Cited
US3337310A
Cited
US3712798A
Cited
US3623921A
Cited
US3640689A
Cited
US3683965A
Cited
US3686732A
Cited
US4101703A
Cited
US4101703B1
Cited
US3750266A
Cited
US4040870A
Cited
US3874900A
Cited
US4196233A
Cited
JPS527831A
Cited
US4237184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |