| 摘要 |
PURPOSE:To enable recording of identification information in a large amount in a limited space by a method wherein a position-alignment mark in a printed circuit board is used also for recording of an identification code, and the position of the position-alignment mark for recording the paste of a printed-circuit pattern of each layer and the color tone of the pattern of each layer are selected appropriately. CONSTITUTION:In a position-alignment mark of a printed-circuit board formed by aligning, for instance, square patterns of layers of a milk-white dielectric, a black resistor and green cover glass, first the digit of a numeric is constructed of each of a plurality of square patterns 4 in a first layer conductor, and one or a plurality of square patterns S of the milk-white dielectric are aligned with the square patterns in the first-layer conductor of the digits corresponding to identification information desired to be recorded. Next, one or a plurality of square patterns 6 of the black resistor are aligned with the square patterns in the first-layer conductor of the digits corresponding to identification information desired to be recorded. Then, one or a plurality of square patterns 7 of the green cover glass are aligned with the square patterns in the first layer conductor of the digits corresponding to identification information desired to be recorded. In this way, identification codes are recorded on the position- alignment marks. |
