Heat sink material and method of manufacturing the heat sink material

A heat sink material comprising carbon or graphite and metal which is at least one selected from Cu, Al, and Ag, said metal having one or more of Nb, Cr, Zr, Be, Ti, Ta, V, B and Mn added to improve reactivity with said carbon or graphite,

• wherein said heat sink material is constructed by infiltrating a porous sintered member with said metal, said porous sintered member being obtained by sintering said carbon or said graphite to form a network,
• wherein an average coefficient of thermal conductivity of those in directions of orthogonal three axes, or a coefficient of thermal conductivity in a direction of any axis is not less than 180 W/mK, and a ratio of coefficient of thermal conductivity is not more than 1:5 between a direction in which said coefficient of thermal conductivity is minimum and a direction in which said coefficient of thermal conductivity is maximum, and
• wherein a coefficient of thermal expansion is 1×10−6 to 10×10−6/° C.

A heat sink material comprising carbon or graphite and metal which is at least one selected from Cu and Ag, said metal includes an element added thereto to improve molten metal flow performance, said element added to said metal has a temperature range of solid phase/liquid phase of not less than 30° C.,

• wherein said heat sink material is constructed by infiltrating a porous sintered member with said metal, said porous sintered member being obtained by sintering said carbon or said graphite to form a network,
• wherein an average coefficient of thermal conductivity of those in directions of orthogonal three axes, or a coefficient of thermal conductivity in a direction of any axis is not less than 180 W/mK, and a ratio of coefficient of thermal conductivity is not more than 1:5 between a direction in which said coefficient of thermal conductivity is minimum and a direction in which said coefficient of thermal conductivity is maximum, and
• wherein a coefficient of thermal expansion is 1×10−6to 10×10−6/° C.

A heat sink material comprising carbon or graphite and metal which is at least one selected from Cu, Al, and Ag, said metal having an element added thereto for lowering a melting point of said metal,

• wherein said heat sink material is constructed by infiltrating a porous sintered member with said metal, said porous sintered member being obtained by sintering said carbon or said graphite to form a network,
• wherein an average coefficient of thermal conductivity of those in directions of orthogonal three axes, or a coefficient of thermal conductivity in a direction of any axis is not less than 180 W/mK, and a ratio of coefficient of thermal conductivity is not more than 1:5 between a direction in which said coefficient of thermal conductivity is minimum and a direction in which said coefficient of thermal conductivity is maximum, and
• wherein a coefficient of thermal expansion is 1×10−6 to 10×10−6/° C.

A heat sink material comprising carbon or graphite and metal which is at least one selected from Cu, Al, and Ag, said metal having an element added thereto for improving a coefficient of thermal conductivity of said heat sink material,

• wherein said heat sink material is constructed by infiltrating a porous sintered member with said metal, said porous sintered member being obtained by sintering said carbon or said graphite to form a network,
• wherein said added element being alloyed with said met to obtain an alloy which is deposited on the surface of said metal after heat treatment and reaction with carbon, and wherein said alloy has an initial coefficient of thermal conductivity of not less than 10 W/mk.
• wherein an average coefficient of thermal conductivity of said heat sink material in directions of orthogonal three axes, or a coefficient of thermal conductivity in a direction of any axis is not less than 180 W/mK, and a ratio of coefficient of thermal conductivity is not more than 1:5 between a direction in which said coefficient of thermal conductivity is minimum and a direction in which said coefficient of thermal conductivity is maximum, and wherein a coefficient of thermal expansion is 1×10−6 to 10×10−6/° C.

A heat sink material comprising carbon or graphite and metal which is at least one selected from Cu, Al, and Ag,

• wherein a carbide layer is formed on a surface of said carbon or said graphite,
• wherein an average coefficient of thermal conductivity of those in directions of orthogonal three axes, or a coefficient of thermal conductivity in a direction of any axis is not less than 180 W/mK, and a ratio of coefficient of thermal conductivity is not more than 1:5 between a direction in which said coefficient of thermal conductivity is minimum and a direction in which said coefficient of thermal conductivity is maximum, and
• wherein a coefficient of thermal expansion is 1×10−6 to 10×10−6/° C.