The effect of humidity on an SnO2 thick-film planar resistor

✍ Scribed by S.G. Ansari; Z.A. Ansari; M.R. Kadam; R.N. Karekar; R.C. Aiyer

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 391 KB
• Volume: 21
• Category: Article
• ISSN: 0925-4005
• DOI: 10.1016/0925-4005(93)01241-u

✦ Synopsis

The effect of humidity on the d.c. resistance of an SnO,:Sb:SnCI, thick-film planar resistor on an alumina substrate is reported. The lilms of SnO, are obtained using standard screen-printing technology. The thick-film paste is formulated by loading the SnO,:Sb system with varying percentages of S&I,-2H,O. An increasing percentage of SnCl, in the SnO,:Sb system increases the sensitivity to humidity and decreases the initial resistance. A two orders of magnitude change in d.c. resistance is observed for a relative humidity change from 30 to 90%. A small hysteresis @-lo%) is observed. The response time is a few seconds (6-8), though the recovery time is slow (g-10 min).