Metallic printed board
First Claim
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1. A metallic printed board having layers including a metallic plate, an electric insulating layer and a metallic film, comprising:
- a plurality of insulating regions in said electric insulating layer, said plurality of insulating regions being formed respectively of a plurality of electric insulating materials, one of said plurality of electric insulating materials having a dielectric constant which is less than or equal to 5.0, another of said plurality of electric insulating materials having a thermal resistance which is less than or equal to 2.2°
C/W said plurality of insulating regions being arranged on an identical plane surface of said metallic plate.
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Abstract
A metallic printed board having layers including a metallic plate, an electric insulating layer and a metallic film, includes a plurality of insulating regions in the electric insulating layer. The insulating regions have different dielectric or thermal properties and are formed of a number of kinds of electric insulating materials having the different dielectric or thermal properties respectively. The insulating regions are arranged on an identical plane surface of the metallic plate.
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Citations
11 Claims
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1. A metallic printed board having layers including a metallic plate, an electric insulating layer and a metallic film, comprising:
a plurality of insulating regions in said electric insulating layer, said plurality of insulating regions being formed respectively of a plurality of electric insulating materials, one of said plurality of electric insulating materials having a dielectric constant which is less than or equal to 5.0, another of said plurality of electric insulating materials having a thermal resistance which is less than or equal to 2.2°
C/W said plurality of insulating regions being arranged on an identical plane surface of said metallic plate.- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A metallic printed board having layers including a metallic plate, an electric insulating layer and a metallic film, comprising:
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a first insulating layer formed as a part of said electric insulating layer, said first insulating layer being composed of a glass non-textile fiber which is coated with a mixture of resin and inorganic filling materials including a aluminum oxide of between 50 parts and 70 parts by weight, silicon dioxide of between 1 part and 10 parts by weight, magnesium silicate of between 1 part and 10 parts by weight and thermoset resin of between 1 part and 10 parts by weight; and a second insulating layer formed as another part of said electric insulating layer and forming a continuous surface with said first insulating layer, said second insulating layer being composed of a glass non-textile fiber which is coated with a mixture of resin and inorganic filling materials including aluminum hydroxide of between 10 parts and 20 parts by weight, magnesium silicate of between 10 parts and 20 parts by weight, silicon dioxide of between 1 part and 5 parts by weight and thermoset resin of between 60 parts and 80 parts by weight.
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9. A metallic printed board having layers including a metallic plate, an electric insulating layer and a metallic film, comprising:
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a first insulating layer formed as a part of said electric insulating layer, said first insulating layer being composed of a glass non-textile fiber which is coated with a mixture of resin and inorganic filling materials including aluminum oxide of between 50 parts and 70 parts by weight, silicon dioxide of between 1 part and 10 parts by weight, magnesium silicate of between 1 part and 10 parts by weight and thermoset resin of between 1 part and 10 parts by weight; a second insulating layer formed as another part of said electric insulating layer, said second insulating layer being disposed side by side with said first insulating layer, said second insulating layer being composed of a glass non-textile fiber which is coated with a mixture of resin and inorganic filling materials including aluminum hydroxide of between 10 parts and 20 parts by weight, magnesium silicate of between 10 parts and 20 parts by weight, silicon dioxide of between 1 part and 5 parts by weight and thermoset resin of between 60 parts and 80 parts by weight; and a third insulating layer forming another part of said electric insulating layer, disposed adjacent to and forming a continuous surface with said first insulating layer and developed on said second insulating layer, said third insulating layer being composed of an aromatic polyamide non-textile fiber which is coated with a thermoset resin.
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10. A metallic printed board having layers including a metallic plate, an electric insulating layer and a metallic film, comprising:
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a first insulating layer formed as a part of said electric insulating layer, said first insulating layer being composed of a glass non-textile fiber which is coated with a mixture of resin and inorganic filling materials including aluminum oxide of between 50 parts and 70 parts by weight, silicon dioxide of between 1 part and 10 parts by weight, magnesium silicate of between 1 part and 10 parts by weight and thermoset resin of between 1 part and 10 parts by weight; a second insulating layer formed as another part of said electric insulating layer, disposed adjacent to and forming a continuous surface with said first insulating layer, said second insulating layer being composed of a glass non-textile fiber which is coated with a mixture of resin and inorganic filling materials including aluminum hydroxide of between 10 parts and 20 parts by weight, magnesium silicate of between 10 parts and 20 parts by weight, silicon dioxide of between 1 part and 5 parts by weight and thermoset resin of between 60 parts and 80 part by weight; and a third insulating layer formed as another part of said electric insulating layer, said third insulating layer being developed on said identical surface defined by said first insulating layer and said second insulating layer, and being composed of an aromatic polyamide non-textile fiber which is coated with a thermosetting resin.
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11. A metallic printed circuit board having layers including a metallic plate and an electric insulating layer, comprising:
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a plurality of insulating regions in said electric insulating layer, said plurality of insulating regions being formed respectively of a plurality of electric insulating materials, said plurality of insulating regions being arranged on an identical plane surface of said metallic plate; and a plurality of circuits being formed on an identical plane surface of said plurality of insulating regions, a respective one of said plurality of circuits being disposed so as to correspond to each of said plurality of insulating regions.
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Specification