抄録
A suspension with IC-chip, what is called "Chip On Suspension (COS)" is most effective technology to increase data transfer rate of hard disk drives (HDDs). One of the most concern of COS is thermal affective of head suspension. This report is primary experimental study to control the temperature of COS. The temperatures of IC-chip were measured in a 3.5-inch type HDD. The experimental results are follows. Thermal conductance of IC-chip is almost proportional to its rotational Reynolds number. Thermal response time of IC-chip is almost in inverse to proportion to the square of its thermal conductance, These results are useful to determine the location of IC-chip, structure of FPC, and maximum continuous time of power supply to IC-chip. As a conclusion, it is possible to control the temperature of COS under the required temperature.
