Heat Sink and Method of Manufacturing the Same

A heat sink a heat exchanging substrate made by forming material having high thermal conductivity into a flat plate shape, and a heat exchanging fin having coil elements formed by winding a metal wire having high thermal conductivity into a coil and flattening the coil-shaped metal wire in whole, said coil elements being in contact with the adjacent ones in their mutually displaced state, said coil fin being secured on the outer surface of said heat exchanging substrate in their wound state.

A heat sink comprising a spirally wound heat exchanging fin having coil elements formed by winding metal wire having high thermal conductivity into a coil and flattening the coil-shaped metal wire in whole with bringing said coil elements in contact with the adjacent ones in their mutually displaced state.

A method for manufacturing a heat sink, comprising the steps of making a heat exchanging fin formed in a long strap shape by winding a metal wire having high thermal conductivity into a coil and flattening the coil-shaped metal wire in whole with bringing said coil elements in contact with the adjacent ones in their mutually displaced state, and continuously winding said strap-like heat exchanging fin around the outer periphery of a heat exchanging substrate made by forming material having high thermal conductivity into a cylindrical shape.

A method for manufacturing a heat sink, comprising the steps of making a heat exchanging fin formed in a long strap shape by winding a metal wire having high thermal conductivity into a coil and flattening the coil-shaped metal wire in whole with bringing said coil elements in contact with the adjacent ones in their mutually displaced state, and winding said heat exchanging fin around the outer periphery of a heat exchanging substrate made by forming material having high thermal conductivity into a cylindrical shape, while supplying said strap-like heat exchanging fin to said heat exchanging substrate being rotated.

A method for manufacturing a heat sink, comprising the steps of making a heat exchanging fin formed in a long strap shape by winding a metal wire having high thermal conductivity into a coil and flattening the coil-shaped metal wire in whole with bringing said coil elements in contact with the adjacent ones in their mutually displaced state, and securing said strap-like heat exchanging fin on a heat exchanging substrate made by forming material having high thermal conductivity into a flat plate while maintaining said strap-like heat exchanging fin in a spiral shape.

A method for manufacturing a heat sink, comprising the steps of making a heat exchanging fin formed in a long strap shape by winding a metal wire having high thermal conductivity into a coil, flattening the coil-shaped metal wire in whole with bringing said coil elements in contact with the adjacent ones in their mutually displaced state, and maintaining said strap-like heat exchanging fin in a spiral shape.