US6603915B2
Expired / Lapsed
US
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Interposer and method for producing a light-guiding structure
Assignee: Fujitsu Ltd
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Filing: 2001-02-05
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Granted: 2003-08-05
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Expires: 2021-02-05
Abstract
Abstract An interposer and method for producing an interposer. The method comprises forming in a substrate a cladding layer having a known density value; and forming in the substrate a waveguide core layer in contact with the cladding layer and also having a known density value which is greater than the density value of the cladding layer. The method further includes forming in the substrate a second cladding layer in contact with the waveguide core layer and having a known density value less than the density value of the waveguide core layer. A method for producing a light-guiding structure comprising forming in a substrate a cladding layer having a top substrate surface and a porosity value; and forming in the substrate a waveguide core layer in contact with the cladding layer and having a porosity value less than the porosity value of the cladding layer. The method also includes forming in the substrate another cladding layer in contact with the waveguide core layer and having a porosity value greater than the porosity value of the waveguide core layer. The two cladding layers and the waveguide core layer terminate in the top substrate surface of the substrate.
Inventors
- 👤 Alexei Glebov
- 👤 Mark McCormack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:41
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/12004; G02B6/122; G02B6/1221; G02B6/125; G02B6/13; G02B6/132; G02B6/24; G02B6/42; G02B6/43; H; H10; H10W; H10W74/00; H10W74/10; H10W74/15; H10W90/00; H10W90/701; H10W90/721; H10W90/724; H10W90/731; H10W90/734
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
146 words
A method for producing light-guiding structure comprising: providing a substrate having a top substrate surface; forming in the substrate a first cladding layer having a first porosity value, said first cladding layer having a body portion disposed below said top substrate surface and one or more end portions terminating in said top substrate surface; forming in the substrate a waveguide core layer in contact with the first cladding layer and having a second porosity value less than the first porosity value, said waveguide layer having a body portion disposed below said top substrate surface and one or more portions terminating in said top substrate surface; and forming in the substrate a second cladding layer in contact with the waveguide core layer and having a third porosity value greater than the second porosity value, said second cladding layer having a portion terminating in said top substrate surface.
Claim 2
Independent Claim
146 words
A method for producing light-guiding structure comprising: providing a substrate having a top substrate surface; forming in the substrate a first cladding layer having a first porosity value, said first cladding layer having a body portion disposed below said top substrate surface and one or more end portions terminating in said top substrate surface; forming in the substrate a waveguide core layer in contact with the first cladding layer and having a second porosity value less than the first porosity value, said waveguide layer having a body portion disposed below said top substrate surface and one or more portions terminating in said top substrate surface; and forming in the substrate a second cladding layer in contact with the waveguide core layer and having a third porosity value greater than the second porosity value, said second cladding layer having a portion terminating in said top substrate surface.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said second cladding layer has a top cladding surface which is generally aligned with the top substrate surface.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein said first porosity value generally equals said third porosity value.
Claim 5
Dependent Claim
17 words
The method of claim 2 , wherein said first porosity value generally equals said third porosity value.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein said first cladding layer and said second cladding layer comprise silicon.
Claim 7
Dependent Claim
21 words
The method of claim 1 additionally comprising expanding said first cladding layer, said waveguide core layer, and said second cladding layer.
Claim 8
Dependent Claim
21 words
The method of claim 1 additionally comprising oxidizing said first cladding layer, said waveguide core layer, and said second cladding layer.
Claim 9
Dependent Claim
24 words
The method of claim 1 additionally comprising determining the first porosity value of intended first cladding layer prior to forming said first cladding layer.
Claim 10
Dependent Claim
68 words
The method of claim 8 wherein said determining of said first porosity value comprises providing a value for a width of first cladding layer, and finding the angle of a first plane along a first side of intended first cladding layer with a second plan tangential to a second side of intended first cladding layer at a point of intersection of the first plane with the second side.
Claim 11
Independent Claim
140 words
A method for producing an interposer comprising: providing a substrate having a top substrate surface; forming in the substrate a first cladding layer having a first density value, said first cladding layer having a body portion disposed below said top substrate surface and one or more end portions terminating in said top substrate surface; forming in the substrate a waveguide core layer in contact with the first cladding layer and having a second density value greater than the first density value, said waveguide layer having a body portion disposed below said top substrate surface and one or more portions terminating in said top substrate surface; and forming in the substrate a second cladding layer terminating in said top substrate surface and in contact with the waveguide core layer and having a third density value less than the second density value.
Claim 12
Independent Claim
140 words
A method for producing an interposer comprising: providing a substrate having a top substrate surface; forming in the substrate a first cladding layer having a first density value, said first cladding layer having a body portion disposed below said top substrate surface and one or more end portions terminating in said top substrate surface; forming in the substrate a waveguide core layer in contact with the first cladding layer and having a second density value greater than the first density value, said waveguide layer having a body portion disposed below said top substrate surface and one or more portions terminating in said top substrate surface; and forming in the substrate a second cladding layer terminating in said top substrate surface and in contact with the waveguide core layer and having a third density value less than the second density value.
Claim 13
Dependent Claim
144 words
An interposer comprising a silicon body having a silicon surface, a first cladding layer including a pair of first opposed cladding layer ends and a body portion extending through said silicon body, the first cladding layer having its body portion disposed below the silicon surface and having its opposed cladding layer ends terminating in said silicon surface; a core layer including a pair of opposed core layer ends and a body portion extending through said silicon body in contact with said first cladding layer, the core layer having its body portion disposed below the silicon surface and having its opposed core layer ends terminating in said silicon surface; and a second cladding layer including a second cladding surface and disposed in said silicon body in contact with said core layer and such that said second cladding surface is generally aligned with said silicon surface.
Claim 14
Dependent Claim
144 words
An interposer comprising a silicon body having a silicon surface, a first cladding layer including a pair of first opposed cladding layer ends and a body portion extending through said silicon body, the first cladding layer having its body portion disposed below the silicon surface and having its opposed cladding layer ends terminating in said silicon surface; a core layer including a pair of opposed core layer ends and a body portion extending through said silicon body in contact with said first cladding layer, the core layer having its body portion disposed below the silicon surface and having its opposed core layer ends terminating in said silicon surface; and a second cladding layer including a second cladding surface and disposed in said silicon body in contact with said core layer and such that said second cladding surface is generally aligned with said silicon surface.
Claim 15
Dependent Claim
25 words
The interposer of claim 11 wherein said first cladding layer and said second cladding layer have a porosity ranging from about 20% to about 80%.
Claim 16
Dependent Claim
25 words
The interposer of claim 12 wherein said core layer has a porosity which is less than the porosity of the first and second cladding layers.
Claim 17
Dependent Claim
19 words
The interposer of claim 13 wherein said core layer has a porosity ranging from about 25% to about 50%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-08-04 | 2007-02-03 | 2007-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-08-04 | 2011-02-03 | 2011-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-08-04 | 2015-02-03 | 2015-08-05 | $7700.00 | Window Closed / Lapsed |