Hitachi, Ltd.

Hitachi Chemical Company, Ltd.

Tadamichi Asai

Toshio Ogawa

Osamu Ito

Akira Ikegami

Kousuke Nakamura

Mitsuru Hasegawa

Satoru Ogihara

Kunihiro Maeda

Mitsuru Ura

Yasuo Matsushita

Yukio Takeda

Takao Kobayashi

Tokio Ohkoshi

Mituru Fujii

Katsuo Ebisawa

Teizo Tamura

Kazuhiko Ato

Yoshishige Endou

Noritaka Kamimura

Hiroshi Ohtsu

Hiromi Isomae

Masaki Kamiakutsu

Michio Otani

Yoshishige Endoh

Michio Ootani

The present invention relates to a thick film resistor material which is suitable especially for thick film hybrid IC having conductor, resistor, semiconductor element and the like in which Cu is used as the conductor and furthermore, a thick film resistor composition which can be fired in a reducing atmosphere. The present invention further relates to a thick film hybrid IC using the thick film resistor composition as a resistor and a method for making it.

Thick film resistor composition, hybrid IC using the composition, and

In a semiconductor device such as hybrid IC, thermal heads, etc., a thick film resistor of the semiconductor device contains a boride particle of a metal dispersed in a glass matrix, the particle having a particles size of 0.005 to 0.1 .mu.m. Generation of a thermal stress can be suppressed and the electroconductive particles themselves form isotropic electroconductive passages by such dispersion, and the semiconductor devices can have a distinguished electroconductivity. Preferable boride of a metal is LaB.sub.6, which gives distinguished resistor characteristics.

Semiconductor device

A substrate for hybrid IC which comprises a substrate, a thick film resistor containing glass, formed on the substrate, and a thick film conductor at the terminal of the thick film resistor, where a means for preventing diffusion of the glass from the thick film resistor into the thick film conductor is provided between the thick film resistor and the thick film conductor has a stable resistance as a thick film microresistor and is applied to various uses such as cellular radio communication system.

Substrate for hybrid IC, hybrid IC using the substrate and its

The present invention provides an electronic circuit component having a ceramic base and more particularly to a conductive paste for circuit film and an electronic circuit component having a copper film circuit of 10 .mu.m of less in film thickness formed from said conductive paste and a method for making the electronic circuit component. The characteristic of the present invention resides in a conductive paste comprising 100 parts by weight of copper powder of 1 .mu.m or less in average particle size, 0.01-4 parts by weight of at least one of S, Te and Se and 1-10 parts by weight of a frit glass as a binder. Further, there is provided an electronic circuit component having a copper film circuit containing 0.005-2 parts by weight of at least one of S, Te and Se and an effective amount of a glass as a binder for 100 parts by weight of copper which is produced by forming a circuit pattern of said conductive paste on an insulating base by flexo-printing method or the like and then firing the pattern. Especially, since a copper film of 10 .mu.m or less in thickness can be easily formed by printing method, an electronic circuit component having fine circuit pattern comparable to conventional gold film can be provided. This electronic circuit component is excellent as electronic circuit components which require low circuit loss.

Electrically conductive paste, electronic circuit component and method

A semi-conductor device comprising sintered aluminum nitride having a high thermal conductivity, which comprises at least 65% by weight of aluminum nitride, and at least one of beryllium, a beryllium compound, lithium and a lithium compound.

Sintered aluminum nitride semi-conductor device

Sintered aluminum nitride having a high thermal conductivity, which comprises at least 65% by weight of aluminum nitride, and at least one of beryllium, a beryllium compound, lithium and a lithium compound, and a semi-conductor device using the same.

Sintered aluminum nitride and semi-conductor device using the same

A resistor spark plug having, between a terminal screw and a center electrode, electrical conductive glass seals and a resistor glass seal therebetween, said electrical conductive glass seals containing carbon, one or more metals and glass and said resistor glass seal containing carbon, silicon carbide, glass, boron carbide or titanium carbide, and if desired a filler, has a small voltage coefficient of resistance and stable properties and is effective for reducing noise from an ignition system.

Resistor glass seal spark plug

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Ibaraki, Japan

Tadamichi Asai