US6048616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated quantum sized doped semiconductor particles and method of manufacturing same
Assignee: Philips North America LLC
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Filing: 1994-10-14
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Granted: 2000-04-11
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Expires: 2014-10-14
Abstract
Abstract Doped encapsulated semiconductor nanoparticles of a size (<100 ANGSTROM ) which exhibit quantum effects. The nanoparticles are precipitated and coated with a surfactant by precipitation in an organometallic reaction. The luminescence of the particles may be increased by a further UV curing step.
Inventors
- 👤 Dennis Gallagher
- 👤 Rameshwar Bhargava
- 👤 Jacqueline Racz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/025; C09K11/08; C09K11/57; C09K11/572; C09K11/574; H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/18; H05B33/20; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/12; Y10T428/12181; Y10T428/12201; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
45 words
A chemically doped precipitated particle of semiconductor material of less than 100 Å in diameter encapsulated with a surfactant, the surfactant maintaining a quantum confinement of said particle and further providing a surface passivation of said particle, the dopant concentration of said particle being 0.5-1.0%.
Claim 2
Dependent Claim
45 words
A chemically doped precipitated particle of semiconductor material of less than 100 Å in diameter encapsulated with a surfactant, the surfactant maintaining a quantum confinement of said particle and further providing a surface passivation of said particle, the dopant concentration of said particle being 0.5-1.0%.
Claim 3
Dependent Claim
17 words
The doped particle as claimed in claim 1 wherein said doped particle comprises ZnS doped with Mn.
Claim 4
Dependent Claim
13 words
The doped particle as claimed in claim 1 wherein said surfactant comprises poly(methylmethacrylate).
Claim 5
Dependent Claim
19 words
The doped particle as claimed in claim 1 wherein said particle has been cured by exposure to UV light.
Claim 6
Dependent Claim
14 words
The doped particle as claimed in claim 1 wherein said particle is a phosphor.
Claim 7
Dependent Claim
46 words
A particle of semiconductor material of less than 100 Å in diameter, said particle chemically doped having a dopant of 0.5-1.0% concentration therein and encapsulated with a surfactant, the surfactant maintaining a quantum confinement of said particle and further providing a surface passivation of said particle.
Claim 8
Dependent Claim
46 words
A particle of semiconductor material of less than 100 Å in diameter, said particle chemically doped having a dopant of 0.5-1.0% concentration therein and encapsulated with a surfactant, the surfactant maintaining a quantum confinement of said particle and further providing a surface passivation of said particle.
Claim 9
Dependent Claim
20 words
The particle of claim 6 in which said dopant is a phosphor activator and said particle is a phosphor host.
Claim 10
Dependent Claim
12 words
The particle of claim 6 in which said surfactant is UV cured.
Claim 11
Dependent Claim
11 words
The particle of claim 6 in which said surfactant is poly(methylmethacrylate).
Claim 12
Dependent Claim
11 words
The particle of claim 6 in which said particle comprises ZnS.
Claim 13
Dependent Claim
11 words
The particle of claim 6 in which said dopant is Mn.
Claim 14
Dependent Claim
28 words
The particle as claimed in claim 6 wherein the particle is selected from the group consisting of zinc sulfide, zinc selinide, zinc telluride, cadmium sulfide and cadmium selinide.
Claim 15
Dependent Claim
26 words
The particle as claimed in claim 6 wherein the dopant is selected from the group consisting of manganese, terbium, copper, silver, thallium, cerium, chromium and titanium.
Claim 16
Dependent Claim
12 words
The particle of claim 6 in which said surfactant is methacrylic acid.
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) | 2003-04-11 | 2003-10-11 | 2004-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-11 | 2007-10-11 | 2008-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-11 | 2011-10-11 | 2012-04-11 | $7700.00 | Window Closed / Lapsed |