Tdk Corporation

Yasuo Niwa

Kohji Toda

Matsumi Watanabe

Kohji Takahashi

Hiroshi Sasaki

Hitoshi Tanaka

Tomoaki Nonaka

Ryohei Nakano

Masaru Abe

Kakeru Watanabe

A dielectric ceramic composition comprising forsterite in an amount of 93.0 to 99.0 mol % when calculating in terms of 2MgO.SiOand calcium titanate in an amount of 1.0 to 7.0 mol % when calculating in terms of CaTiOas main components, and as a subcomponent, aluminum oxide in an amount of 0.2 to 5 mass % when calculating in terms of AlOper 100 mass % of said main components. According to the present invention, a dielectric ceramic composition, capable of having both low permittivity and good frequency-temperature characteristic as well as ensuring high Qf value and further having sufficient mechanical strength, and suitable to use in an antenna, a filter and the like used in the high-frequency region, can be provided. Also, the present invention allows providing a dielectric ceramic composition further having resistance to reduction in addition to all of the above properties.

Dielectric ceramic composition

A dielectric ceramic composition, comprising a main component including at least a dielectric oxide having a composition expressed by [(CaSr)O][(TiZrHf)O], a first subcomponent including a Mn oxide and/or an Al oxide and a glass component, wherein 'm', 'x', &#x201c;y&#x201d; and &#x201c;z&#x201d; indicating composition mole ratios in the formula included in the main component are in relationships of 0.90&#x2266;m&#x2266;1.04, preferably 1.005&#x2266;m&#x2266;1.025, 0.5&#x2266;x&#x3c;1, preferably 0.6&#x2266;x&#x2266;0.9, 0.01&#x2266;y&#x2266;0.10, preferably 0.02&#x2266;y&#x2266;0.07 and 0&#x3c;z&#x2266;0.20, preferably 0&#x3c;z&#x2266;0.10.

Dielectric ceramic composition, electronic device and production methods of the same

A dielectric ceramic composition comprising a main component including 53.00 to 80.00 mol % magnesium oxide converted to MgO, 19.60 to 47.00 mol % titanium oxide converted to TiOand 0.05 to 0.85 mol % manganese oxide converted to MnO. This dielectric ceramic composition may comprises 0.00 to 0.20 mol % of at least any one of vanadium oxide, yttrium oxide, ytterbium oxide or holmium oxide converted to VO, YO, YbOand HoOrespectively.

Dielectric ceramic composition, electronic device and their process of manufacturing

A method of manufacturing a photoelectric conversion device, comprising: forming a thin film of a substance containing PbO and Cr.sub.2 O.sub.3 in a vacuum by an electron beam evaporation process using the substance as a target; and subjecting the thin film to heat treatment in an atmosphere containing at least Pb.

Method of manufacturing a photoelectric conversion device

A photoelectric conversion device in which a thin crystalline Pb--Cr oxide film is formed on the surface of a substrate and a pair of spaced apart conductive film electrodes are formed on the thin film. The thin crystalline Pb--Cr oxide film is formed by a vacuum evaporation process using a sintered body prepared from PbO and Cr.sub.2 O.sub.3 as a target and heat treating the thin film in an atmosphere containing Pb.

Growing community of inventors

Yurihonjo, Japan

Yasuo Niwa