Patent US4717631A successfully refreshed from Google Patents.
US4717631A
Expired / Lapsed
US
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Silicon oxynitride passivated semiconductor body and method of making same
Assignee: RCA Corp
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Filing: 1986-06-25
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Granted: 1988-01-05
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Expires: 2006-06-25
Abstract
Abstract A semiconductor body with an improved passivating layer is disclosed. In one embodiment, the body is a device comprising a semiconductor material having regions of opposite conductivity types which form a semiconductor junction therebetween which extends to a surface of the device. The passivating layer, comprising silicon oxynitride having a refractive index between about 1.55 and 1.75 and a substantial hydrogen content, overlies the surface at the junction. Also disclosed is a method for fabricating such a device wherein the vapor deposition of the passivating layer is carried out at low temperatures from an ambient having a ratio of silicon-containing to oxygen- and nitrogen-containing precursors of between about 1:1.67 and 1:5.
Inventors
- 👤 Grzegorz Kaganowicz
- 👤 Ronald E. Enstrom
- 👤 John W. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:25
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/69; H10P14/692; H10P14/6921; H10P14/6922; H10P14/6927; C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/308; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/22; H10F30/221; H10F30/2215; H10F77/00; H10F77/30; H10F77/306; H10P14/63; H10P14/6326; H10P14/6328; H10P14/6334; H10P14/6336; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528; Y10T428/12674; Y10T428/12681
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
101 words
In a semiconductor body having a passivating layer which overlies a surface of said body, the improvement wherein said passivating layer comprises a silicon oxynitride material deposited by plasma enhanced chemical vapor deposition at a temperature of from about 25° to about 200° C., said layer having a refractive index of between about 1.55 and 1.75 and being comprised of from about 8 to about 20 atomic percent of hydrogen, from about 9 to about 35 atomic percent of silicon, from about 9 to about 35 atomic percent of nitrogen, and from about 10 to about 50 atomic percent of oxygen.
Claim 2
Dependent Claim
101 words
In a semiconductor body having a passivating layer which overlies a surface of said body, the improvement wherein said passivating layer comprises a silicon oxynitride material deposited by plasma enhanced chemical vapor deposition at a temperature of from about 25° to about 200° C., said layer having a refractive index of between about 1.55 and 1.75 and being comprised of from about 8 to about 20 atomic percent of hydrogen, from about 9 to about 35 atomic percent of silicon, from about 9 to about 35 atomic percent of nitrogen, and from about 10 to about 50 atomic percent of oxygen.
Claim 3
Dependent Claim
30 words
A semiconductor body in accordance with claim 1, wherein said body comprises first and second regions of opposite conductivity types with a semiconductor junction therebetween which extends to said surface.
Claim 4
Dependent Claim
17 words
A body in accordance with claim 1, wherein said passivating layer is in contact with said surface.
Claim 5
Dependent Claim
18 words
A body in accordance with claim 1, wherein the passivating layer has a refractive index of about 1.60.
Claim 6
Dependent Claim
54 words
A body in accordance with claim 1, wherein the silicon oxynitride material comprises from about 10 to about 15 atomic percent of hydrogen, from about 25 to about 30 atomic percent of silicon, from about 25 to about 30 atomic percent of nitrogen, and from about 20 to about 40 atomic percent of oxygen.
Claim 7
Dependent Claim
22 words
A body in accordance with claim 1, wherein the passivating layer further comprises a layer of borophosphosilicate glass overlying said passivating layer.
Claim 8
Dependent Claim
22 words
A body in accordance with claim 1, wherein a layer of borophosphosilicate glass is interposed between the surface and said passivating layer.
Claim 9
Dependent Claim
17 words
A body in accordance with claim 1, wherein said body is comprised of an alloy of indium.
Claim 10
Dependent Claim
54 words
A body in accordance with claim 2, wherein said body comprises: a substrate; said first region overlying said substrate; and said second region disposed within said first region such that said semiconductor junction extends to said surface and underlies said passivating layer, said passivating layer having an opening therethrough contiguous with said second region.
Claim 11
Dependent Claim
12 words
A body in accordance with claim 9, further comprising a light-absorptive region.
Claim 12
Dependent Claim
16 words
A body in accordance with claim 10, wherein the first region is said light absorptive region.
Claim 13
Dependent Claim
20 words
A body in accordance with claim 11, wherein said first region comprises an absorptive region and a cap region thereover.
Claim 14
Dependent Claim
33 words
A body in accordance with claim 12, wherein the subtrate is n-type InP, the absorptive region is an InGaAs alloy, the cap region is n-type InP and the second region is p-type InP.
Claim 15
Dependent Claim
156 words
In a method of making a semiconductor device comprising: forming on a suitable substrate a first region of a first conductivity type; forming a second region of a second conductivity type adjacent said first region such that a semiconductor junction is formed therebetween, which junction extends to a surface of said device; and depositing a passivating layer over said surface at said junction, the improvement comprising depositing as said passivating layer silicon oxynitride having a refractive index of between about 1.55 and 1.75 and comprising from about 8 to about 20 atomic percent of hydrogen, from about 9 to about 35 atomic percent of silicon, from about 9 to about 35 atomic percent of nitrogen, and from about 10 to about 50 atomic percent of oxygen, said layer being deposited at a temperature of between about 25° C. and 200° C. by plasma enhanced chemical vapor deposition from an atmosphere comprising silicon-containing, nitrogen-containing and oxygen-containing precursors.
Claim 16
Dependent Claim
156 words
In a method of making a semiconductor device comprising: forming on a suitable substrate a first region of a first conductivity type; forming a second region of a second conductivity type adjacent said first region such that a semiconductor junction is formed therebetween, which junction extends to a surface of said device; and depositing a passivating layer over said surface at said junction, the improvement comprising depositing as said passivating layer silicon oxynitride having a refractive index of between about 1.55 and 1.75 and comprising from about 8 to about 20 atomic percent of hydrogen, from about 9 to about 35 atomic percent of silicon, from about 9 to about 35 atomic percent of nitrogen, and from about 10 to about 50 atomic percent of oxygen, said layer being deposited at a temperature of between about 25° C. and 200° C. by plasma enhanced chemical vapor deposition from an atmosphere comprising silicon-containing, nitrogen-containing and oxygen-containing precursors.
Claim 17
Dependent Claim
54 words
A method in accordance with claim 14, wherein the passivating layer is deposited on the first region before formation of said second region and wherein said second region is formed by diffusion, said method additionally including the step of forming an opening in said passivating layer to function as a mask for said diffusion.
Claim 18
Dependent Claim
17 words
A method in accordance with claim 14, wherein said precursors are silane, ammonia, and nitrous oxide, respectively.
Claim 19
Dependent Claim
23 words
A method in accordance with claim 16, wherein the ratio of silane to nitrous oxide plus ammonia is between about 1:1.67 and 1:5.
Claim 20
Dependent Claim
17 words
A method in accordance with claim 17, wherein the deposition is carried out at about 25° C.
References Cited (Backward Citations)
GB1211354A
Cited
US3481781A
Cited
US3765935A
Cited
US3886000A
Cited
GB1452884A
Cited
US4097889A
Cited
US4328508A
Cited
US4532022A
Cited
EP0071203A2
Cited
US4543707A
Cited
US4512284A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |