| 摘要 |
<p>PURPOSE:To make it possible to obtain a humidity-sensitive resistor showing excellent durability without characteristics such that a resistance increasing width is large and a responsive speed is high, by mixing a resin insoluble in water with a polyethylene oxide resin as a fixing agent to a base plate. CONSTITUTION:A pair of silver electrodes 2a, 2b as electrodes for soldering and a pair of ruthenium (Ru) electrodes 3a, 3b each having a comb shape of which the opposed intervals are about 0.7mm., the total length of the opposed part is about 8mm. and the film thickness is about 15mum are formed on an alumina base plate 1 and the electrode regions are coated with a solution prepared by dissolving an 1:1 mixture of a polyethylene oxide resin and a carbon powder being a conductive powder in polypropylene glycol being a solvent and the coating is dried under heating at 160 deg.C to form a humidity-sensitive film 4 with a thickness of about 4mum. As the resin used as a fixing agent to the base plate, a polyamide resin, an acrylic resin or a PVA resin enhanced in water resistance can be used alone or a mixed form.</p> |
