Patent US4900892A successfully refreshed from Google Patents.
US4900892A
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Method for working members composed of oxide material
Assignee: Via Mechanics Ltd
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Filing: 1988-05-27
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Granted: 1990-02-13
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Expires: 2008-05-27
Abstract
Abstract A method for working an oxide material, and preferably a ceramic oxide material, with a laser emission of an excimer laser and without the creation of damage layers includes pulsing the laser emission to be impinged on the material to be worked.
Inventors
- 👤 Dieter Baeuerle
- 👤 Michael Eyett
- 👤 Helmut Thomann
- 👤 Wolfram Wersing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:21
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/36; B23K26/40; B23K26/50; B23K26/53; B23K2103/00; B23K2103/50; B23K2103/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A method for working members composed of a perovskite material selected from the group consisting of lead-, calcium-, barium-, titanate, -zirkonate, -tantalate, and high-temperature superconductor material, comprising the steps of: directing a laser emission having a wavelength in air of less than approximately 350 nm onto a processing zone of a member to be worked; pulsing the laser emission so that only pulses of laser energy impinge the member to be worked; and relating a pulse duration, a pulse repetition rate and a pulse energy to one another so that significant harmful heat accumulation is avoided in the member to be worked in a near region of a processing zone.
Claim 2
Independent Claim
110 words
A method for working members composed of a perovskite material selected from the group consisting of lead-, calcium-, barium-, titanate, -zirkonate, -tantalate, and high-temperature superconductor material, comprising the steps of: directing a laser emission having a wavelength in air of less than approximately 350 nm onto a processing zone of a member to be worked; pulsing the laser emission so that only pulses of laser energy impinge the member to be worked; and relating a pulse duration, a pulse repetition rate and a pulse energy to one another so that significant harmful heat accumulation is avoided in the member to be worked in a near region of a processing zone.
Claim 3
Dependent Claim
21 words
A method as claimed in claim 1, further comprising a step of using an excimer laser to generate the laser emission.
Claim 4
Dependent Claim
31 words
A method as claimed in claim 1, further comprising the steps of: using a Nd:YAG laser to generate the laser emission; and frequency multiplying the laser emission of the Nd:YAG laser.
Claim 5
Dependent Claim
20 words
A method as claimed in claim 1, further comprising the step of: enclosing the material in a housing during working.
Claim 6
Dependent Claim
19 words
A method as claimed in claim 1, further comprising the step of: performing working of the material in air.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |