Laser printing method and apparatus

Details Laser printing method and apparatus Laser printing method and apparatus

2002-03-13

2004-09-21

Pham, Hai (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C219S121610

Reexamination Certificate

active

06795105

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a laser printing method and a laser printing apparatus and, more particularly, relates to laser printing method and apparatus suitable for printing characters on base material such as glassy or vitreous material by using laser light beam.
In a module used for a conventional general purpose computer of the like, a carrier board (MCC: microchip for carrier) on which an LSI (large scale integrated circuit) or the like is attached is mounted on a multi layer wiring circuit board (MLC: multi layer ceramics). Number or the like such as a serial number is usually printed on the side surface of the MCC board so as to perform the management of the production or the like. Conventionally, mullite/W has been employed as the material of the MCC board. Further, a YAG laser has been employed as a laser oscillator in the conventional laser printing apparatus for printing characters on the mullite/W board.
BRIEF SUMMARY OF THE INVENTION
Recently, a module used in a general purpose computer has been highly integrated as an LSI, and the MCC has been required to have high accuracy in its parts in accordance with the progress of the integration. The accuracy of the parts is required in the warp of the board, variance in the plate thickness of the board, pitch or the like. The inventors of the present application consider to employ glass/Cu in place of the conventional mullite/W as the material of the board having such a high parts accuracy. It was proved that the parts accuracy can be improved by using the glass/Cu. However, on the other hand, it was proved that the printing quality is not good when the conventional laser printing apparatus prints characters on the glass material such as glass/Cu. To be more concrete, when small-sized characters each having such a width of 0.47 mm and a height of 0.7 mm are printed, it was impossible to discriminate such characters.
Accordingly, an object of the present invention is to provide a laser printing method and a laser printing apparatus which can improve printing quality.
In order to attain the aforesaid object, the present invention is arranged in a manner that in a laser printing method for printing on a member to be printed by using laser light emitted from a laser oscillator, the printing is performed on the member to be printed by using laser light emitted from a solid-state laser oscillator serving as the laser oscillator which emits laser light of third harmonics in an ultraviolet range.
Further, the present invention is arranged in a manner that the laser printing apparatus comprises a laser oscillator, a scanning means for scanning laser light emitted from the laser oscillator, and a converging means for converging the laser light emitted from the laser oscillator on a member to be printed and prints on the member to be printed by using laser light emitted from the laser oscillator, wherein the laser oscillator is a solid-state laser oscillator which emits laser light of third harmonics in an ultraviolet range.
According to such a configuration of the present invention, clear printing can be performed also on a glass type board or the like and the printing quality can be improved.


REFERENCES:
patent: 4538193 (1985-08-01), Dimmick et al.
patent: 4692829 (1987-09-01), Campbell
patent: 5191187 (1993-03-01), Kajikawa
patent: 5319511 (1994-06-01), Lin
patent: 5593606 (1997-01-01), Owen et al.
patent: 5717676 (1998-02-01), Kaneda et al.
patent: 5833759 (1998-11-01), Haslow et al.
patent: 5841102 (1998-11-01), Noddin
patent: 5886535 (1999-03-01), Budnaitis
patent: 6058132 (2000-05-01), Iso et al.
patent: 6066829 (2000-05-01), Ishikawa
patent: 6097742 (2000-08-01), Caprara et al.
patent: 6117706 (2000-09-01), Yoshioka et al.
patent: 6172325 (2001-01-01), Baird et al.
patent: 6203952 (2001-03-01), O'Brien et al.
patent: 6433810 (2002-08-01), Katayama et al.
patent: 3826355 (1990-04-01), None
patent: 708 550 (1996-04-01), None
Miyata, S., “Organic Nonlinear Optical Materials,” Journal of the Illuminating Engineering Institute of Japan, Jan. 1993, Japan, vol. 77, No. 1, pp. 33-39.

Affiliated with

Also associated with

Rating

Laser printing method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Laser printing method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser printing method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3250859