PURPOSE: To enable contactless detection inconspicuously by bonding transmission and reception side folded-back substrates formed by using metal patterns of a plurality of folded-back parts of transmitting and receiving lines to a substrate and connecting a wire to one end of each folded-back part and the other end to the terminal side of each transmitting line and receiving line.
CONSTITUTION: A transmitting line 622 is disposed on one surface of the transmission side glass substrate 617c and a receiving line 626 on the other surface of the reception side glass substrate 617b. A transmission side folded-back substrate 619a bonded to the substrate 617c is formed with one row of a plurality of arcuate folded-back parts 61 by a metal pattern of copper foil and one end 62a of a wire 62 is soldered to one end 61a of each folded-back part 61 by solder 63. The other end 62b is connected to a start point 64a of a turning- around part 64 and through the turning-around part 64 to a transmitting terminal 623. Similarly, one end 61a of each folded-back part 61 in a reception side folded-beck substrate 629a bonded to the reception side glass substrate 617a is soldered to the wire 62.
KAWASHIMA KAZUNARI
HANDA SHIGERU
