Heat sink for cooling a heat producing element and application

A heat sink for cooling a heat producing element, comprising:

• a heat sink body made of the material having the good heat conductivity, the heat sink body including a wall capable of being mounted on the heat producing element;
• a fan assembly having a diameter installed in an internal space of the heat sink body, the fan assembly extending into the heat sink body to a certain depth and supported by said wall, including a drive and fan blades fixed on a rotating shaft of the drive, wherein the wall is cooled by a cooling air generated by a rotation of the fan blades, and wherein the width of the heat sink body and the diameter of the fan assembly are substantially different, thereby defining a region between the fan assembly and the outer periphery of the heat sink body;
• a vertical partition surrounding the periphery of the fan blades;
• and
• heat radiation fins disposed on a top face of the wall within the region of the heat sink body.