Title:
LASER MARKING METHOD AND APPARATUS AND LIQUID CRYSTAL ELEMENT DRIVING METHOD
Document Type and Number:
WIPO Patent Application WO/1998/023406
Kind Code:
A1
Abstract:
In a laser marking method, wherein a liquid crystal mask having thereon a desired pattern to be marked is scanned with a laser beam to mark an object with the pattern by the laser beam passed through the liquid crystal mask, the liquid crystal mask is maintained in a predetermined condition of a temperature higher than room temperature, a marking operation being carried out by using a laser beam in such a high-temperature condition, thus enabling a speed of response of the liquid crystal element, and a working efficiency concerning the laser marking operation to be improved.
Inventors:
CHIBA TEIICHIRO (JP)
OKUBO TSUYOSHI (JP)
SUGIMOTO YUKIHIKO (JP)
OKUBO TSUYOSHI (JP)
SUGIMOTO YUKIHIKO (JP)
Application Number:
PCT/JP1997/004337
Publication Date:
June 04, 1998
Filing Date:
November 27, 1997
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
CHIBA TEIICHIRO (JP)
OKUBO TSUYOSHI (JP)
SUGIMOTO YUKIHIKO (JP)
CHIBA TEIICHIRO (JP)
OKUBO TSUYOSHI (JP)
SUGIMOTO YUKIHIKO (JP)
International Classes:
G02F1/13; B23K26/00; B23K26/066; G02F1/133; H01L23/00; (IPC1-7): B23K26/00; B23K26/06; G02F1/133
Foreign References:
| JPH06226476A | 1994-08-16 | |||
| JPH03116016A | 1991-05-17 | |||
| JPH02293820A | 1990-12-05 | |||
| JPH0542761A | 1993-02-23 | |||
| JPH06304775A | 1994-11-01 |
Attorney, Agent or Firm:
Kimura, Takahisa (8-11 Minato 1-chom, Chuo-ku Tokyo 104, JP)
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