| 摘要 |
<p>PURPOSE:To lower costs and improve accuracy of resistance value and reliability by making spiral grooves in a platinum film formed by thick-film techniques, by laser working. CONSTITUTION:Paste prepd. by dispersing platinum powder in an org. vehicle is coated on the outside surface of an insulating pipe 1 consisting of ceramics or glass, and is dried, after which it is heated, whereby a platinum film 2 is formed on the outside surface of the insulating pipe 1. After this, spiral grooves 3 are made by laser working to the platinum film 2 in such a manner as not to allow the platinum to remain in the parts of said grooves 3, whereby the platinum resistance film having prescribed resistance value is formed. Electrode terminals 4 are provided to both ends thereof. Further, amorphous glas is coated on the platinum resistance film and the grooves 3, and is dried, whereby a glass coated film 5 is formed. Thereby, the costs are lowered through the utilization of thick-film techniques and the resistance value having high accuracy is obtained through the utilization of laser working.</p> |
