Patent ID: 7777990

Claim:
A magnetic disk unit comprising: a magnetic disk arranged in a freely rotational manner; and a magnetic head slider disposed to face a surface of the magnetic disk, and having a magnetic recording element provided thereon to record data into the magnetic disk; wherein air flow between the magnetic disk and the magnetic head slider is generated to fly the magnetic head slider above the magnetic disk; wherein the magnetic head slider has a slider substrate part and a thin-film head part formed on the slider substrate part using a thin-film process, wherein the thin-film head part comprises an insulating member, the magnetic recording element provided in the insulating member, and a heat radiation member for radiating heat generated by the magnetic recording element from lateral regions of the magnetic recording element to the slider substrate part, and wherein the heat radiation member is formed from two edges opposed to both sides of the magnetic recording element, and one edge opposed to a side opposite to the side of the slider substrate part of the magnetic recording element, the three edges form a U shape having an opening facing towards the direction of an air inflow end face.