Simulation of temperature distribution around media heat spot in heat assisted magnetic recording

Abstract

The super-fast growth in recording areal density and the correlative decrease of the exterior dimension has been greatly beneficial to the widespread use of hard disk drives (HDDs). In the pursuit of high areal recording density, the heat assisted magnetic recording (HAMR) has been promised to be a new and feasible technology for the next generation of HDDs. In this paper, the temperature distribution around media heat spot in HAMR drive is studied. Firstly, a three-dimensional HAMR drive finite element model consisting of the disk, voice coil motor (VCM), suspension, slider, and filter is built. Then, the flow characteristics and temperature distributions in HAMR drives filled with air and helium are investigated respectively. Finally, the cooling effects of the high speed disk rotation and the heat convection in head-disk interface (HDI) are analyzed and compared.