Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Works, Ltd.

Panasonic Corporation

The Dow Chemical Company

Hiroyoshi Yoden

Noboru Hashimoto

Yoshitaka Nakamura

Yuki Kotani

Susumu Kajita

Kyoji Tanaka

Tsutomu Furuta

Takeshi Ueda

Mitsuo Yaguchi

Shigehito Deki

Yasushi Sawada

Yi-Hung Chiao

William Rafaniello

Theresa A Guiton

JunHong Zhao

Hajime Kishi

Takashi Saruwatari

Hisamitsu Takahashi

A pressure sensoraccording to the first aspect of the invention includes: a substrate; and a functional elementwhich is laid on the substrateand is composed of functional titanium oxide including crystal grains of at least one of &#x3b2;-phase trititanium pentoxide (&#x3b2;-TiO) and &#x3bb;-phase trititanium pentoxide (&#x3bb;-TiO) and having the property that at least a portion of crystal grains of at least one of &#x3b2;-phase trititanium pentoxide (&#x3b2;-TiO) and &#x3bb;-phase trititanium pentoxide (&#x3bb;-TiO) change into crystal grains of titanium dioxide (TiO) when the functional titanium oxide is heated to 350&#xb0; C. or higher. The substrateincludes a substrate thin-film sectionhaving a thin film form in which the thickness in the stacking direction of the substrateand the functional elementis smaller than that in the other directions.

Pressure sensor

A functional element includes functional titanium oxide. The functional titanium oxide includes crystal grains of one or more of &#x3b2;-phase trititanium pentoxide (&#x3b2;-TiO) and &#x3bb;-phase trititanium pentoxide (&#x3bb;-TiO). The functional titanium oxide includes the property that at least a portion of crystal grains of one or more of &#x3b2;-phase trititanium pentoxide (&#x3b2;-TiO) and &#x3bb;-phase trititanium pentoxide (&#x3bb;-TiO) changes into crystal grains of titanium oxide (TiO) when the functional titanium oxide is heated to 350&#xb0; C. or higher.

Functional element and temperature sensor of crystal grain trititanium pentoxide

An insulating thermally conductive resin composition () includes a matrix resin () and insulators (). The insulators () are dispersed in the matrix resin and have electrical insulation. The insulating thermally conductive resin composition further includes a thermally conductive phase () which has a hither thermal conductivity than the matrix resin and thermally connects the insulators with each other. The thermally conductive phase () is composed of an organic substance. The thermally conductive phase that thermally connects the insulators is composed of the organic substance, so that the resultant insulating thermally conductive resin composition has electrical insulation while having improved thermal conductivity.

Insulating thermally conductive resin composition

An insulating thermally conductive resin composition () includes a phase-separated structure including: a first resin phase () in which a first resin continues three-dimensionally; and a second resin phase () different from the first resin phase and formed of a second resin. Moreover, the insulating thermally conductive resin composition includes: small-diameter inorganic filler () unevenly distributed in the first resin phase; and large-diameter inorganic filler () that spans the first resin phase and the second resin phase and thermally connects pieces of the small-diameter inorganic filler, which is unevenly distributed in the first resin phase, to one another. Then, an average particle diameter of the small-diameter inorganic filler is 0.1 to 15 &#x3bc;m. Moreover, an average particle diameter of the large-diameter inorganic filler is larger than the average particle diameter of the small-diameter inorganic filler, and is 1 to 100 &#x3bc;m.

Aluminum nitride sintered body with high thermal conductivity and its

An aluminum nitride (AlN) sintered product with a high thermal conductivity of 120 W/m.multidot.k or above can be produced at a relatively low sintering temperature of 1650.degree. C. or below in accordance with the following process of the present invention. That is, an A1N powder having a specific surface in a region of about 3.5 to 8 m.sup.2 /g and an oxygen content between 0.5 to 1.8 wt % is mixed with optimum additive amounts of sintering aids (I) to (III) to obtain a mixture powder. The sintering aid (I) is at least one selected from the group consisting of rare earth oxides and rare earth compounds which are converted to corresponding rare earth oxides by the sintering. The sintering aid (II) is at least one selected from the group consisting of alkaline earth oxides and alkaline earth compounds which are converted to corresponding alkaline earth oxides by the sintering. The sintering aid (III) is at least one selected from the group consisting of LAB.sub.6, NbC, and WB. The optimum additive amount of LaB.sub.6 is in a range of 0.05 to 3 wt % of the A1N sintered product. The mixture powder is compacted, and then sintered at the sintering temperature in a non-oxidation atmosphere to obtain the A1N sintered product.

Process for producing an aluminum nitride sintered product

A process for producing aluminum nitride powders is disclosed, which comprises mixing a water-soluble aluminum-containing compound or an aluminum alkoxide and a water-soluble carbon-containing compound and/or a water-soluble nitrogen-containing compound, with water; drying the mixture to obtain a solid; and calcining the solid in a nitrogen-containing non-oxidative atmosphere. According to the process of the invention, high-purity uniform aluminum nitride fine powders can be obtained rapidly and inexpensively.

Process for producing aluminum nitride powders

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Osaka, Japan

Hiroyoshi Yoden