| 摘要 |
PURPOSE:To enable thermal conductivity to be greatly improved without detriment to electrical insulating properties, by incorporating a microballoon made of glass and enclosing a gas or a liquid having good thermal conductivity therein in an electrical insulating resin. CONSTITUTION:A microballoon made of glass, having a particle size of 1-100mu and enclosing a gas or a liquid having good thermal conductivity (e.g., Freon or silicone oil) therein is incorporated in an electrical insulating resin (e.g., an epoxy resin or a phenolic resin). Glass is an electrical insulant so that a resin material having good thermal conductivity as well as good electrical insulating properties and suitable for use in sheathing electronic components can be obtd.
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