Thermal impedance of thick-film resistance thermometers below 0.2 K

✍ Scribed by G. Ventura; L. Lanzi; I. Peroni; A. Peruzzi; G. Ponti

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 260 KB
• Volume: 37
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(97)80276-7

✦ Synopsis

Contributions

to the thermal impedance of thickfilm resistors (TFRs) are discussed. Measurements of the heat flow along the resistance layer, through the substrate and through the glass overcoating, are presented for commercial resistors mounted on a copper plate in the 30-170 mK temperature range. Because of the relatively good thermal conductivity of the film material (three orders of magnitude higher than that of alumina), the contribution to the heat flow of the resistance layer is never negligible in spite of the thinness of the latter. Suggestions are given for the best mounting of the TFRs as low-temperature thermometers. Less conventional uses of TFRs as thermometers in bolometers are also considered.