Patent US2282442A successfully refreshed from Google Patents.
US3873339A
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Method of forming optical waveguide circuit path
Assignee: Corning Glass Works
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Filing: 1974-02-01
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Granted: 1975-03-25
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Expires: 1994-02-01
Abstract
Abstract A method of producing a planar optical waveguide circuit path by applying to at least a portion of a smooth surface of a glass substrate having a predetermined desired index of refraction a first coating of glass particles having an index of refraction greater than that of the glass substrate. A beam of laser light is caused to impinge upon the first coating and is caused to move thereacross in a predetermined manner to form a narrow path of fused glass on the surface of the substrate. After the remaining unfused glass particles are removed, a film of glass having an index of refraction less than that of the fused glass path may be applied over that path and at least a portion of the exposed surface of the substrate adjacent thereto.
Inventors
- 👤 Marshall C Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:45
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/13; C; C03; C03B; C03B19/00; C03B19/14; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03C; C03C17/00; C03C17/02; C03C17/34; C03C17/3411; C03C17/3417; C03C23/00; C03C23/0005; C03C23/0025; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
153 words
A METHOD OF FORMING A PLANAR OPTICAL WAVE-GUIDE COMPRISING THE STEPS OF PROVIDING A GLASS SUBSTRATE HAVING A PREDETERMINED DESIRED INDEX OF REFRACTION, APPLYING A FIRST COATING OF GLASS PARTICLES HAVING AN INDEX OF REFRACTION GREATER THAN THAT OF SAID GLASS SUBSTRATE TO AT LEAST A PORTION OF ONE SURFACE OF SAID SUBSTRATE, DIRECTING A BEAM OF LASER LIGHT ONTO SAID FIRST COATING TO FUSE THOSE GLASS PARTICLES UPON WHICH SAID BEAM IMPINGES DUE TO ABSORPTION OF LIGHT ENERGY THEREBY, MOVING SAID SUBSTRATE RELATIVE TO SAID BEAM TO FORM A PATH OF FUSED GLASS, REMOVING FROM SAID SUBSTRATE THE UNFUSED PORTION OF SAID FIRST COATING, AND DISPOSING ON THE ENTIRE EXPOSED SURFACE OF SAID PATH OF FUSED GLASS AND AT LEAST A PORTION OF THE EXPOSED SURFACE OF SAID SUBSTRATE WHICH IS ADJACENT THERETO A CONTINUOUS FILM OF NON-PARTICULATE GLASS HAVING A REFRACTIVE INDEX LESS THAN THAT OF SAID PATH OF FUSED GLASS.
Claim 2
Independent Claim
153 words
A METHOD OF FORMING A PLANAR OPTICAL WAVE-GUIDE COMPRISING THE STEPS OF PROVIDING A GLASS SUBSTRATE HAVING A PREDETERMINED DESIRED INDEX OF REFRACTION, APPLYING A FIRST COATING OF GLASS PARTICLES HAVING AN INDEX OF REFRACTION GREATER THAN THAT OF SAID GLASS SUBSTRATE TO AT LEAST A PORTION OF ONE SURFACE OF SAID SUBSTRATE, DIRECTING A BEAM OF LASER LIGHT ONTO SAID FIRST COATING TO FUSE THOSE GLASS PARTICLES UPON WHICH SAID BEAM IMPINGES DUE TO ABSORPTION OF LIGHT ENERGY THEREBY, MOVING SAID SUBSTRATE RELATIVE TO SAID BEAM TO FORM A PATH OF FUSED GLASS, REMOVING FROM SAID SUBSTRATE THE UNFUSED PORTION OF SAID FIRST COATING, AND DISPOSING ON THE ENTIRE EXPOSED SURFACE OF SAID PATH OF FUSED GLASS AND AT LEAST A PORTION OF THE EXPOSED SURFACE OF SAID SUBSTRATE WHICH IS ADJACENT THERETO A CONTINUOUS FILM OF NON-PARTICULATE GLASS HAVING A REFRACTIVE INDEX LESS THAN THAT OF SAID PATH OF FUSED GLASS.
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein said first coating of glass particles is formed by depositing a layer of glass soot on at least a portion of one flat surface of said substrate by flame hydrolysis.
Claim 4
Dependent Claim
53 words
The method of claim 1 wherein said glass film is formed by the steps of depositing a second coating of glass particles over said path of fused glass and at least a portion of the exposed surface of said substrate adjacent thereto, and heating said second coating to fuse the glass particles thereof.
Claim 5
Dependent Claim
41 words
The method of claim 3 wherein said second coating is formed by depositing by flame hydrolysis a coating of glass soot over said path of fused glass and at least a portion of the exposed surface of said substrate adjacent thereto.
Claim 6
Dependent Claim
103 words
The method of claim 1 wherein said first coating of glass particles is formed by the step of depositing a first coating of doped silica soot over at least a portion of one flat surface of said substrate by flame hydrolysis, and wherein said glass film is formed by the step of depositing by the flame hydrolysis process a second coating of silica soot over said path of fused glass and at least a portion of the exposed surface of said substrate adjacent thereto and heating the structure so formed until said second coating of soot fuses and forms said film of glass.
Claim 7
Dependent Claim
42 words
The method of claim 5 wherein said first coating of soot is silica doped with at least one material selected from the group consisting of titanium oxide, tantalum oxide, tin oxide, niobium oxide, zirconium oxide, aluminum oxide, lanthanum oxide and germanium oxide.
Claim 8
Dependent Claim
24 words
The method of claim 5 wherein said first coating of soot is silica doped with not more than 20 percent by weight titanium oxide.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein said film of glass is applied by radio frequency sputtering.
Claim 10
Dependent Claim
16 words
The method of claim 1 wherein said film of glass is applied by chemical vapor deposition.
Claim 11
Dependent Claim
22 words
The method of claim 1 wherein said film of glass is formed by applying a glass frit and thereafter fused said frit.
Claim 12
Independent Claim
159 words
A method of forming a planar optical waveguide comprising the steps of providing a substantially flat glass substrate having a predetermined desired index of refraction, depositing over at least a portion of one flat surface of said substrate by flame hydrolysis a first coating of doped silica soot having an index of refraction greater than that of said substrate, directing a beam of laser light onto said first coating to fuse that soot upon which said beam impinges due to absorption of light energy thereby, moving said substrate relative to said beam to form a path of doped fused silica, removing from said substrate the unfused portion of said first coating, depositing by flame hydrolysis a second coating of silica soot over said path of doped fused silica and at least a portion of the exposed surface of said substrate adjacent thereto and, heating the structure so formed to form from said second coating a film of fused silica.
Claim 13
Independent Claim
159 words
A method of forming a planar optical waveguide comprising the steps of providing a substantially flat glass substrate having a predetermined desired index of refraction, depositing over at least a portion of one flat surface of said substrate by flame hydrolysis a first coating of doped silica soot having an index of refraction greater than that of said substrate, directing a beam of laser light onto said first coating to fuse that soot upon which said beam impinges due to absorption of light energy thereby, moving said substrate relative to said beam to form a path of doped fused silica, removing from said substrate the unfused portion of said first coating, depositing by flame hydrolysis a second coating of silica soot over said path of doped fused silica and at least a portion of the exposed surface of said substrate adjacent thereto and, heating the structure so formed to form from said second coating a film of fused silica.
Claim 14
Dependent Claim
11 words
The method of claim 11 wherein said substrate consists of Silica.
Claim 15
Dependent Claim
42 words
The method of claim 12 wherein said first coating of soot is silica doped with at least one material selected from the group consisting of titanium oxide, tantalum oxide, tin oxide, niobium oxide, zirconium oxide, aluminum oxide, lanthanum oxide and germanium oxide.
Claim 16
Dependent Claim
24 words
The method of claim 12 wherein said first coating of soot is silica doped with not more than 20 percent by weight titanium oxide.
References Cited (Backward Citations)
US2272342A
Cited
US2326059A
Cited
US3106858A
Cited
US3135591A
Cited
US3395366A
Cited
US3440092A
Cited
US3560258A
Cited
US3396401A
Cited
US3737292A
Cited
US3809732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |