Admatechs Company Limited

Shingi Noguchi

Tempo Nakamura

Masaru Kuraki

Yoshinori Okawauchi

Tomio Inoue

Provided is a filler that has a low viscosity when mixed in a resin material and has reduced permittivity and dielectric loss tangent. The filler includes: a metal oxide particle material; and a polyorganosiloxane compound with which a surface treatment is performed on the metal oxide particle material and which is represented by general formula (1): (RO)Si&#x2014;(SiR&#x2014;O&#x2014;)&#x2014;SiR(in general formula (1), each R is independently selected from among alkyl groups having 1 to 4 carbon atoms, and n is not less than 10 and not greater than 200). A resin composition obtained by containing the filler in a resin is suitable for an electronic material.

Surface treated-metal oxide particle material, method for producing same, resin composition for electronic material, and filler for silicone resin material

A particulate material is mainly composed of alumina, has a volume average particle diameter of from 70 to 200 &#x3bc;m, has a degree of sphericity of from 0.89 or more to less than 0.99, has a degree of alfa-aluminization of from 40 to 85%, and produces a result of 0.017 g or less in an abrasion test for equipment.

Particulate material and thermal conductive substance

A silicone-coated filler comprises: a particulate material mainly composed of an inorganic oxide formed by oxidizing a predetermined element; a first silicone structure bonded to a surface of the particulate material by way of a '-'the predetermined element'-OSi&#x2014;' structure; and a second silicone structure including a cross-linking structure with a carbon-carbon structure directly bonded to a silicon atom of the first silicone structure, and a polysiloxane structure bonded to the cross-linking structure.

Growing community of inventors

Miyoshi, Japan

Shingi Noguchi