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United States Patent 6,433,810
Katayama ,   et al. August 13, 2002
Laser printing method and apparatus for printing characters

Abstract

A laser printing apparatus is formed by a laser oscillator 10, galvano mirrors 42, 44 for scanning the laser light emitted from the laser oscillator 10, and an f.theta. lens 40 for focusing the laser light emitted from the laser oscillator 10 on MCCs 32, 34 serving as the member to be printed. The laser oscillator 10 is an YLF laser oscillator which emits the laser light of the third harmonics in the ultraviolet range. The laser printing is performed on the MCCs 32, 34 serving as the member to be printed by using the laser light emitted from the laser oscillator 10.

Inventors: Katayama; Kaoru (Hadano, JP); Inoue; Kenichi (Higashimurayama, JP); Shirai; Mitsugu (Hadano, JP); Sakamoto; Tsutomu (Hadano, JP)
Assignee: Hitachi, Ltd. (Tokyo, JP)
Appl. No.: 522016
Filed: March 9, 2000
Foreign Application Priority Data
Mar 11, 1999[JP]11-065188

Current U.S. Class: 347/238; 219/121.61
Intern'l Class: B41J 002/45; B23K 026/00
Field of Search: 347/238,252,254 219/121.61,121.62,121.68,121.71,121.76 372/10,25,30,22,108 250/461.1,365 359/328,329 430/17 438/106

References Cited
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4761786Aug., 1988Baer372/10.
5191187Mar., 1993Kajikawa219/121.
5593606Jan., 1997Owen et al.219/121.
5841102Nov., 1998Noddin219/121.
5869803Feb., 1999Noguchi et al.219/121.
6058132May., 2000Iso et al.372/108.
6097742Aug., 2000Caprara et al.372/22.
6117706Sep., 2000Yoshioka et al.438/106.
6203952Mar., 2001O'Brien et al.430/17.
Foreign Patent Documents
3826355Apr., 1990DE.
708 550Apr., 1996EP.


Other References

Miyata, S., "Organic Nonlinear Optical Materials," Journal of the Illuminating Engineering Institute of Japan, Jan. 1993, Japan, vol. 77, No. 1, pp. 33-39.

Primary Examiner: Pham; Hai
Attorney, Agent or Firm: Mattingly, Stanger & Malur, P.C.
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