Electronic transport in LTCC highly conductive RnO{sub}2+ glass sinters

摘要

The resistors, made of inks with the high content of conductive oxide in a standard "on-alumina" process are subjected to easy rubbing off. The use of LTCC technology enables embedding the samples inside a ceramic substrate -which make them insensitive to any mechanical exposure. Following this idea a resistive paste containing as much as 95 vol.% of RuO{sub}2 powder and only 5% of glass frit has been prepared. The sheet resistance we got was ～1.5Ω/square at room temperature. The resistance versus temperature dependence R(T) reveals metallic-like behavior. The intrinsic resistivity extracted from resistivity data is an order of magnitude larger than that of crystalline RuO{sub}2. This resistivity increase is due to the formation of small contacts between RuO{sub}2 grains -