| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce a DC resistance in the case of constituting an antenna coil by using conductive paste by partly increasing a pattern line width of a coil for a part having a dimensional allowance in mounting the coil. SOLUTION: Coils 1 and 2 of a card according to an ISO are stipulated at its disposing interval and inner diameter, and must be formed in a limited area. In the case of forming the coils 1, 2 by a printing means, if there are many number of turns, it is necessary to thin a line width of a printing pattern. Wirings t1 of the coils 1, 2 in a longitudinal direction are formed, for example, in 150μm line width similar to that of prior art, and wirings t2 in a lateral direction are formed, for example, in 300μm wider than that of the t1. When the longitudinal pattern is intended to be thickened, the coils 1 and 2 are short- circuited, but there is a dimensional allowance in the lateral pattern, and it can be thickened. Impedance of the entire coils 1, 2 can be reduced by altering the widths of the lateral and longitudinal directions.</p> |
