US4039702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for settling a glass suspension using preferential polar adsorbtion
Assignee: Optron Inc
•
Filing: 1975-01-13
•
Granted: 1977-08-02
•
Expires: 1995-01-13
Abstract
Abstract A method for settling suspended glass particles from a slurry containing small amounts of a substance, which substance is preferentially adsorbed to the surface of the suspended glass particles, and which adsorbed substance facilitates centrifugal sedimentation of the glass particles without substantially altering the colloidal nature of the suspension. In particular, a method for forming a glass film on a semiconductive wafer or circuit, especially mesa etched structures, including the step of adding a small amount of hydrogen peroxide to the glass slurry before sedimentation of the glass film.
Inventors
- 👤 Raymond DiBugnara
- 👤 Richard Allison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:09
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6326; H10P14/6342; H10P14/69; H10P14/692; H10P14/6921; H10P14/6928; H10P14/6929; H10P14/6936; H10W; H10W74/00; H10W74/01
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
129 words
A method for forming a glass film on an object comprising: covering said object with a dielectric fluid containing a suspension of glass particles, said dielectric fluid being combined with a preferentially adsorbed substance, said particles being covered by an adsorbed layer of said preferentially adsorbed substance; disposing said suspended glass particles onto said object; removing said article with substantially all of said disposed glass particles thereon from said dielectric fluid; and heating said article and said disposed glass to the flow point temperature of said glass of said suspended particles until said glass particles disposed on said object are substantially fused together to form an integral glass film wherein said preferentially adsorbed substance is an aqueous solution selected from the group consisting of hydrogen peroxide, and hydrogen chloride.
Claim 2
Independent Claim
129 words
A method for forming a glass film on an object comprising: covering said object with a dielectric fluid containing a suspension of glass particles, said dielectric fluid being combined with a preferentially adsorbed substance, said particles being covered by an adsorbed layer of said preferentially adsorbed substance; disposing said suspended glass particles onto said object; removing said article with substantially all of said disposed glass particles thereon from said dielectric fluid; and heating said article and said disposed glass to the flow point temperature of said glass of said suspended particles until said glass particles disposed on said object are substantially fused together to form an integral glass film wherein said preferentially adsorbed substance is an aqueous solution selected from the group consisting of hydrogen peroxide, and hydrogen chloride.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein: said disposed glass particles are centrifuged within a force less than 600 g.
Claim 4
Independent Claim
83 words
A method for forming a glass film on an object comprising: covering said object with a dielectric fluid containing a suspension of glass particles, said dielectric fluid having added thereto a solution of hydrogen peroxide; centrifuging said object and said dielectric fluid together to dispose a film of said glass particles onto at least a portion of said object; removing said object from said dielectric fluid; and heating said glass film to fuse substantially all of said glass particles into an integral layer.
Claim 5
Independent Claim
83 words
A method for forming a glass film on an object comprising: covering said object with a dielectric fluid containing a suspension of glass particles, said dielectric fluid having added thereto a solution of hydrogen peroxide; centrifuging said object and said dielectric fluid together to dispose a film of said glass particles onto at least a portion of said object; removing said object from said dielectric fluid; and heating said glass film to fuse substantially all of said glass particles into an integral layer.
Claim 6
Dependent Claim
40 words
The method of claim 3 wherein: said solution is an aqueous solution of hydrogen peroxide; and said dielectric fluid is an alcohol wherein 0.32 ml to 8 ml of hydrogen peroxide has been combined with 100 ml of said alcohol.
Claim 7
Dependent Claim
36 words
The method of claim 3 wherein: said solution is hydrogen peroxide and said hydrogen peroxide is added to said dielectric fluid containing a suspension of glass particles after said object is covered by said dielectric fluid.
Claim 8
Independent Claim
79 words
A method for forming a glass layer on an object using a suspension of glass particles in a dielectric fluid, and centrifugal sedimentation therefrom, the improvement comprising: adding an aqueous solution of hydrogen peroxide in the proportions of 0.32 ml to 8 ml per 100 ml of dielectric fluid to said dielectric fluid, said hydrogen peroxide being preferentially adsorbed by said glass particles, whereby said glass layer formed on said object is compact, substantially uniform and resists running off.
Claim 9
Independent Claim
79 words
A method for forming a glass layer on an object using a suspension of glass particles in a dielectric fluid, and centrifugal sedimentation therefrom, the improvement comprising: adding an aqueous solution of hydrogen peroxide in the proportions of 0.32 ml to 8 ml per 100 ml of dielectric fluid to said dielectric fluid, said hydrogen peroxide being preferentially adsorbed by said glass particles, whereby said glass layer formed on said object is compact, substantially uniform and resists running off.
Claim 10
Dependent Claim
69 words
The method of claim 6 wherein said use of said suspension of glass particles further comprises: covering said object with said dielectric fluid containing said hydrogen peroxide; centrifuging said dielectric fluid and object together to form said glass layer on said object; removing said object having said glass layer thereon from said dielectric fluid; and heating said glass layer to form a substantially integral glass layer on said object.
Claim 11
Dependent Claim
13 words
The method of claim 7 wherein: said dielectric fluid is an methyl alcohol.
Claim 12
Independent Claim
67 words
A method for forming a glass film on an object comprising: covering said object with a dielectric fluid containing a suspension of glass particles, said dielectric fluid being combined with a solution of hydrogen peroxide; disposing said suspended glass particles onto said object; and removing said object from said dielectric fluid with at least some of said disposed glass particles forming a glass layer on said object.
Claim 13
Independent Claim
67 words
A method for forming a glass film on an object comprising: covering said object with a dielectric fluid containing a suspension of glass particles, said dielectric fluid being combined with a solution of hydrogen peroxide; disposing said suspended glass particles onto said object; and removing said object from said dielectric fluid with at least some of said disposed glass particles forming a glass layer on said object.
Claim 14
Dependent Claim
55 words
The method of claim 9 wherein said solution is an aqueous solution of hydrogen peroxide, is approximately a 10 percent solution by weight and is combined with said dielectric fluid containing a suspension of glass particles in proportions of 2 to 40 drops of said hydrogen peroxide solution per 25 ml of said dielectric fluid.
Claim 15
Dependent Claim
53 words
The method of claim 9 wherein: said solution is of hydrogen peroxide and said hydrogen peroxide is a 10 percent aqueous solution by weight and is combined with said dielectric fluid containing a suspension of glass particles in the proportions of 0.32 ml to 8 ml per 100 ml of said dielectric fluid.
References Cited (Backward Citations)
US762547A
Cited
US2356553A
Cited
US2576845A
Cited
US2898232A
Cited
US3546013A
Cited
US3212921A
Cited
US3526530A
Cited
US3748157A
Cited
US3754945A
Cited
US3748156A
Cited
US3752679A
Cited
US3752689A
Cited
US3752681A
Cited
US3754946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |