US5188902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of PT/PZT/PLZI thin films, powders, and laser `direct write` patterns
Assignee: Northern Illinois University
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Filing: 1991-05-30
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Granted: 1993-02-23
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Expires: 2011-05-30
Abstract
Abstract This invention encompasses methods and reagents for making PT, PZT, and PLZT as well as their extrinsic ions doped powders and thin films. In particular, the invention includes methods for localized laser annealing of PT, PZT, PLZT films to the surface of materials to provide articles useful in electronic devices such as high value capacitors, optical switches, wave guides, and the like. A 15-25% by weight of PT/PZT/PLZT in about a 5-10% acetic acid solution having an effective wetting agent of a surfactant has been found to be a superior isolation for making both powders and thin films, especially thin films for laser writing.
Inventors
- 👤 Chhiu-Tsu Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:58
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/25; C03C23/00; C03C23/0005; C03C23/0025; C04B41/45; C04B41/46; C04B41/48; C04B41/80; C04B41/81; C04B41/82; C04B41/83; C23; C23C; C23C26/00; C23C26/02; H; H10; H10N; H10N30/00; H10N30/01; H10N30/07; H10N30/074; H10N30/077; H10N30/078; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/30; C03C2218/32; C04B2111/00; C04B2111/00474; C04B2111/00844; H10N30/80; H10N30/85; H10N30/853; H10N30/8548; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
An article of manufacture comprising a solid surface having a thin ferroelectric film on a portion of the surface wherein the ferroelectric film is formed by annealing lead titantate, lead zirconate titanate, and lead lanthanum zirconate titanate to the solid surface with a laser.
Claim 2
Dependent Claim
44 words
An article of manufacture comprising a solid surface having a thin ferroelectric film on a portion of the surface wherein the ferroelectric film is formed by annealing lead titantate, lead zirconate titanate, and lead lanthanum zirconate titanate to the solid surface with a laser.
Claim 3
Dependent Claim
20 words
An article according to claim 1 wherein the solid surface comprises glass, quartz, gold, silver, platinum, sapphire, or ceramic material.
Claim 4
Dependent Claim
19 words
An article according to claim 2 wherein the ferroelectric film is in the form of a laser written design.
References Cited (Backward Citations)
US4963390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-23 | 1996-08-24 | 1997-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-23 | 2000-08-24 | 2001-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-23 | 2004-08-24 | 2005-02-23 | $7700.00 | Window Closed / Lapsed |