| 摘要 |
PROBLEM TO BE SOLVED: To reduce the material cost, reduce the working man hour and improve the quality of printing by printing and marking a production manage ment number for a radio equipment on a substrate of the radio equipment or on a resist face of the substrate with a CO2 laser marker, a YAG laser marker. SOLUTION: A production control number is printed and marked with a laser beam 4 of a CO2 laser marker or a YAG laser marker 3 on the substrate face of a substrate 1 or on a resist face of the substrate of a radio equipment. Therefore, the material cost of a label and an ink is not required, so the material cost can be reduced. Further, because the adopted printing system uses the heat of the laser beam, the printing is not eliminated semipermanently and the quality of printing is improved. |
