| 摘要 |
PCT No. PCT/JP88/00143 Sec. 371 Date Oct. 10, 1989 Sec. 102(e) Date Oct. 10, 1989 PCT Filed Feb. 12, 1988 PCT Pub. No. WO88/06289 PCT Pub. Date Aug. 25, 1988.A portion of a board (1) on which copper wiring is printed is provided with a carbon coating, the board (1) and lead wires (2) are joined by solder (3), the portion having the solder (3) is insulated with a silicone resin (4), and the carbon-coated printed wiring portion (10a) is successively coated with a redox layer (11) obtained by electro-oxidation of 2,6 xylenol and an ion-selective layer (12), thereby forming an ion sensor (20). Since the ion sensor can be formed on a printed wiring board, various devices which include an ion sensor can readily be fabricated on a board.
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