Patent ID: 6851186

Claim:
A method for manufacturing a heat sink, comprising the steps of: (a) putting a main material with a top into a die; (b) placing a heat transfer promoting material on said top of said main material, wherein said heat transfer promoting material has a thermal conductivity larger than that of said main material; (c) overflowing a material of said main material to bind together with said heat transfer promoting material after being pushed under pressure; (d) projecting a plurality of radiation fins of said heat sink from said main material through a plurality of holes of said die; (e) causing said heat transfer promoting material to form a central part of a top surface of said heat sink and said main material to form a surrounding part of said top surface of said heat sink; (f) removing said heat sink from said die; and (g) cutting and grinding said top surface of said heat sink into a base plate of said heat sink to form a said heat sink having a said plurality of radiation fins.