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EP0086022A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for making electrical contacts to diamond by means of a laser, and diamond provided with contacts according to this optical method

Assignee: Optische Industrie 'de Oude Delft' Te Delft BV
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Filing: 1983-01-28
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Granted: —
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Expires: 2003-01-28
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Abstract

Abstract A method for making electrical contacts to diamond, in which a surface layer of the diamond is transformed by means of a laser beam into graphite having a sheet resistivity in the range of 5 to 100 Ohms. The diamond to be treated and the laser beam are moved with respect to each other according to a raster pattern. The laser is operated with such a pulse width and pulse frequency, the laser beam is focussed in such a way and is moved with respect to the diamond at such a speed, that pit-like surface areas of graphite are formed which join or overlap. After the graphitization a wire or other electrical conductor is fixed to the graphite layer, through which a diamond having electrical contacts is obtained.

Inventors

  • 👤 Eduard Anton Burgemeister

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 20:24
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/20; H10D; H10D64/00; H10D64/01; H10D64/011; H10D64/0111; H10D64/0114; H10F77/10; H10F77/12; H10F77/122; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/547

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 54 words
A method for making electrical contacts to diamond characterized in that a surface layer of the diamond is transformed by means of a laser beam to graphite having a sheet resistivity in the range of 5 to 100 Ohms and that subsequently a wire or other electrical conductor is fixed to this graphite layer.
Claim 2
Independent Claim 54 words
A method for making electrical contacts to diamond characterized in that a surface layer of the diamond is transformed by means of a laser beam to graphite having a sheet resistivity in the range of 5 to 100 Ohms and that subsequently a wire or other electrical conductor is fixed to this graphite layer.
Claim 3
Dependent Claim 30 words
A method according to claim 1 characterized in that the diamond to be treated and the laser beam are moved with respect to each other according to a raster pattern.
Claim 4
Dependent Claim 28 words
A method according to claim 1 or 2 characterized in that one part or, if necessary, more parts of the surface of the diamond are transformed to graphite.
Claim 5
Independent Claim 55 words
A method according to claims 2 or 3 characterized in that the laser is operated with such a pulse width and pulse frequency,the laser beam is focussed in such a way and is moved with respect to the diamond at such a speed, that pit-like surface areas of graphite are formed which join or overlap.
Claim 6
Dependent Claim 41 words
A method according to claim 4 characterized in that the laser beam is directed substantially perpendicular to the surface of the diamond whereby the said pit-like surface areas of 10 to 50 pm diameter and about 30 µm depth are formed.
Claim 7
Dependent Claim 18 words
A diamond provided with electrical contacts by means of the method according to one of the preceding claims.

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