US5986390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron emission device having peak intensity ratio characteristic of raman spectrum for fold ring of SiO2
Assignee: Pioneer Corp
•
Filing: 1998-03-03
•
Granted: 1999-11-16
•
Expires: 2018-03-03
Abstract
Abstract An electron emission device exhibits a high electron emission efficiency. The device includes an electron supply layer of metal or semiconductor, an SiO 2 insulator layer formed on the electron supply layer, and a thin-film metal electrode formed on the insulator layer. The peak intensity ratio of a Raman spectrum for 3-fold rings of SiO 2 of the insulator layer to 4-fold rings or 5 or more-fold rings thereof is equal to or greater than 20%. When an electric field is applied between the electron supply layer and the thin-film metal electrode, the electron emission device emits electrons.
Inventors
- 👤 Takashi Chuman
- 👤 Takamasa Yoshikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:36
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/312; B; B82; B82Y; B82Y10/00; H01J2329/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
An electron emission device comprising: an electron supply layer made of semiconductor material; an insulator layer consisting essentially of silicon oxide and formed as a contiguous layer with and on said electron supply layer; and a thin-film metal electrode formed as a contiguous layer with and on said insulator layer, wherein, when said insulator layer is analyzed by Raman scattering spectrometry, which analyzes intensities of individual bands of fold rings of SiO 2 , said silicon oxide in said insulator layer is characterized by a Raman spectrum indicating that a peak intensity ratio for 3-fold rings of SiO 2 to at least 4-fold rings of SiO 2 is at least 20%, whereby said electron emission device emits electrons when an electric field is applied between said electron supply layer and said thin-film metal electrode.
Claim 2
Dependent Claim
134 words
An electron emission device comprising: an electron supply layer made of semiconductor material; an insulator layer consisting essentially of silicon oxide and formed as a contiguous layer with and on said electron supply layer; and a thin-film metal electrode formed as a contiguous layer with and on said insulator layer, wherein, when said insulator layer is analyzed by Raman scattering spectrometry, which analyzes intensities of individual bands of fold rings of SiO 2 , said silicon oxide in said insulator layer is characterized by a Raman spectrum indicating that a peak intensity ratio for 3-fold rings of SiO 2 to at least 4-fold rings of SiO 2 is at least 20%, whereby said electron emission device emits electrons when an electric field is applied between said electron supply layer and said thin-film metal electrode.
Claim 3
Dependent Claim
164 words
An electron emission display device comprising: a pair of first and second substrates facing each other with a vacuum space in between; a plurality of electron emission devices provided on said first substrate; a collector electrode provided on said second substrate; and a fluorescent layer formed on said collector electrode, wherein each of said electron emission devices comprises an electron supply layer made of semiconductor material, an insulator layer consisting essentially of silicon oxide and formed as a continuous layer with and on said electron supply layer, and a thin-film metal electrode formed as a contiguous layer with and on said insulator layer, wherein, when said insulator layer is analyzed by Raman scattering spectrometry, which analyzes intensities of individual bands of fold rings of SiO 2 , said silicon oxide in said insulator layer is characterized by a Raman spectrum indicating that a peak intensity ratio for 3-fold rings of SiO 2 to at least 4-fold rings of SiO 2 is at least 20%.
Claim 4
Dependent Claim
164 words
An electron emission display device comprising: a pair of first and second substrates facing each other with a vacuum space in between; a plurality of electron emission devices provided on said first substrate; a collector electrode provided on said second substrate; and a fluorescent layer formed on said collector electrode, wherein each of said electron emission devices comprises an electron supply layer made of semiconductor material, an insulator layer consisting essentially of silicon oxide and formed as a continuous layer with and on said electron supply layer, and a thin-film metal electrode formed as a contiguous layer with and on said insulator layer, wherein, when said insulator layer is analyzed by Raman scattering spectrometry, which analyzes intensities of individual bands of fold rings of SiO 2 , said silicon oxide in said insulator layer is characterized by a Raman spectrum indicating that a peak intensity ratio for 3-fold rings of SiO 2 to at least 4-fold rings of SiO 2 is at least 20%.
Claim 5
Dependent Claim
16 words
The electron emission device according to claim 1, wherein said insulator layer is formed by sputtering.
Claim 6
Dependent Claim
20 words
The electron emission device according to claim 1, wherein the insulator layer has a thickness of at least 50 nm.
Claim 7
Dependent Claim
16 words
The electron emission device according to claim 2, wherein the insulator layer is formed by sputtering.
Claim 8
Dependent Claim
21 words
The electron emission display device according to claim 2, wherein the insulator layer has a thickness of at least 50 nm.
Claim 9
Dependent Claim
129 words
An electron emission device comprising: an electron supply layer of semiconductor material; an insulator layer consisting essentially of silicon oxide and formed on an entire surface of said electron supply layer; and a thin-film metal electrode formed on an entire surface of said insulator layer, wherein, when the insulator layer is analyzed by Raman scattering spectrometry, which analyzes intensities of individual bands of fold rings of SiO 2 , said silicon oxide in said insulator layer is characterized by a Raman spectrum indicating that a peak intensity ratio for 3-fold rings of SiO 2 to at least 4-fold rings of SiO 2 is at least 20%, whereby said electron emission device emits electrons when an electric field is applied between said electron supply layer and said thin-film metal electrode.
Claim 10
Dependent Claim
129 words
An electron emission device comprising: an electron supply layer of semiconductor material; an insulator layer consisting essentially of silicon oxide and formed on an entire surface of said electron supply layer; and a thin-film metal electrode formed on an entire surface of said insulator layer, wherein, when the insulator layer is analyzed by Raman scattering spectrometry, which analyzes intensities of individual bands of fold rings of SiO 2 , said silicon oxide in said insulator layer is characterized by a Raman spectrum indicating that a peak intensity ratio for 3-fold rings of SiO 2 to at least 4-fold rings of SiO 2 is at least 20%, whereby said electron emission device emits electrons when an electric field is applied between said electron supply layer and said thin-film metal electrode.
Claim 11
Dependent Claim
159 words
An electron emission display device comprising: a pair of first and second substrates facing each other with a vacuum space in between; a plurality of electron emission devices provided on said first substrate; a collector electrode provided on said second substrate; and a fluorescent layer formed on said collector electrode, wherein each of said electron emission devices comprises an electron supply layer of semiconductor material, an insulator layer consisting essentially of silicon oxide and formed on an entire surface of said electron supply layer, and a thin-film metal electrode formed on an entire surface of said insulator layer, wherein, when the insulator layer is analyzed by Raman scattering spectrometry, which analyzes intensities of individual bands of fold rings of SiO 2 , said silicon oxide in said insulator layer is characterized by a Raman spectrum indicating that a peak intensity ratio for 3-fold rings of SiO 2 to at least 4-fold rings of SiO 2 is at least 20%.
Claim 12
Dependent Claim
159 words
An electron emission display device comprising: a pair of first and second substrates facing each other with a vacuum space in between; a plurality of electron emission devices provided on said first substrate; a collector electrode provided on said second substrate; and a fluorescent layer formed on said collector electrode, wherein each of said electron emission devices comprises an electron supply layer of semiconductor material, an insulator layer consisting essentially of silicon oxide and formed on an entire surface of said electron supply layer, and a thin-film metal electrode formed on an entire surface of said insulator layer, wherein, when the insulator layer is analyzed by Raman scattering spectrometry, which analyzes intensities of individual bands of fold rings of SiO 2 , said silicon oxide in said insulator layer is characterized by a Raman spectrum indicating that a peak intensity ratio for 3-fold rings of SiO 2 to at least 4-fold rings of SiO 2 is at least 20%.
References Cited (Backward Citations)
US3944946A
Cited
US4059813A
Cited
US5817421A
Cited
US5448133A
Cited
US5777427A
Cited
US5811916A
Cited
US5801486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-15 | 2003-05-17 | 2003-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-15 | 2007-05-17 | 2007-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-15 | 2011-05-17 | 2011-11-16 | $7700.00 | Window Closed / Lapsed |