Toyo Ink Sc Holdings Co., Ltd.

Toyochem Co., Ltd.

Toshiichi Sawaguchi

Kaori Sakaguchi

Naohiro Tanaka

Hidenobu Kobayashi

Kenji Andou

Gaku Kashiwamura

Go Miyazawa

The present invention provides a thermally conductive insulating sheet having appropriate fluidity upon being heated and pressurized, and free from of the possibility of a material leaking to the outside beyond the original size of the sheet. The thermally conductive insulating sheet according to the present invention contains an uncured material and/or a semi-cured material of a binder resin (R) which is a thermosetting resin. In the present invention, a complex viscosity in a temperature range of 100-200&#xb0; C. is 10,000-150,000 Pa&#xb7;s, a ratio (&#x3b1;/&#x3b2;) of the maximum value (&#x3b1;) to the minimum value (&#x3b2;) of the complex viscosity in said temperature range is 1.0-4.0, and the flow value is 90-100%. Flow value(%)=W2/W1&#xd7;100.

Thermally conductive insulating sheet, and composite member

A composite member (1) satisfies the following expressions. X/(E&#xd7;|CTE(B)&#x2212;CTE(A)|)&#x2265;50, X/(E&#xd7;|CTE(B)&#x2212;CTE(C)|)&#x2265;50, Y/|CTE(B)&#x2212;CTE(A)|&#xd7;L(BA)&#x2264;50, and Y/|CTE(B)&#x2212;CTE(C)|&#xd7;L(BC)&#x2265;50. X: shear bond strength (MPa) between the heat dissipating base substrate and heat generating member, Y: fracture elongation of the thermoconductive insulating adhesive film, E: modulus of elasticity (MPa) of the thermoconductive insulating adhesive film, CTE(A): linear expansion coefficient (&#xb0; C.) of the heat dissipating base substrate, CTE(B): linear expansion coefficient (&#xb0; C.) of the thermoconductive insulating adhesive film, CTE(C): linear expansion coefficient (&#xb0; C.) of the material of the surface of the heat generating member in contact with the thermoconductive insulating adhesive film, L(BA): initial contact length (m) between the thermoconductive insulating adhesive film and the heat dissipating base substrate, and L(BC): initial contact length (m) between the thermoconductive insulating adhesive film and the heat generating member.

Composite member

The purpose of the present invention is to provide a thermal conductive insulating sheet which has achieved a good balance between insulating properties and thermal conductivity higher than ever before. A thermal conductive insulating sheet according to the present invention contains a thermal conductive spherical filler (excluding boron nitride), a boron nitride filler and a binder resin, and has a plurality of layers (A) that mainly contain the thermal conductive spherical filler (excluding boron nitride) and one or more layers (B) that mainly contain the boron nitride filler, with the layers (A) and the layers (B) being alternately laminated so that layers (A) form the outermost layers.

Thermal conductive insulating sheet, method for producing same, and intermediate laminate

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Tokyo, Japan

Toshiichi Sawaguchi