Title:
STRUCTURE OF GLASS FOR DISCRIMINATION CODE PATTERN FORMATION AND FORMATION OF DISCRIMINATION CODE PATTERN
Document Type and Number:
Japanese Patent JPH07249090
Kind Code:
A
Abstract:
PURPOSE: To provide a glass for discrimination code pattern formation and the formation of the glass which can accurately form a discrimination code pattern after the completion of a product, etc., and is applicable to small-lot articles and reducible in cost.
CONSTITUTION: Glass 12 containing TiO4+ is laminated on an alumina substrate 11, and a barrier layer 13 of SiO2 is laminated thereupon. On the barrier layer 13, glass 14 containing a component reducing Ti4+ is laminated and irradiated with laser light. Consequently, the glass materials 12 and 14 at the laser light irradiated part are fused and mixed to change into a dark color. The dark color change part 15 is used as a bar code.
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Inventors:
WATARAI YUSUKE
TOYODA SEIJI
YOSHIDA HIDEAKI
TOYODA SEIJI
YOSHIDA HIDEAKI
Application Number:
JP6568394A
Publication Date:
September 26, 1995
Filing Date:
March 09, 1994
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
C04B35/10; C03C3/21; G06K1/12; H05K1/02; (IPC1-7): G06K1/12; C03C3/21; C04B35/10
Attorney, Agent or Firm:
Abe Ituro
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