TY - JOUR
T1 - A Study of the Nanoscale Heat Transfer in the HDD Head-Disk Interface Based on a Static Touchdown Experiment
AU - Ma, Yuan
AU - Ghafari, Amin
AU - Wu, Yuying
AU - Bogy, David
N1 - Funding Information:
Yuan Ma and Amin Ghafari contributed equally to this work. This work was supported by the Computer Mechanics Laboratory of UC Berkeley.
Publisher Copyright:
© 1965-2012 IEEE.
PY - 2020/3
Y1 - 2020/3
N2 - Understanding the heat transfer behavior at the nanoscale head-disk interface (HDI) in hard disk drives is crucial for head design, media design, and failure analysis of the current hard disk drive (HDD) industry, especially for the emerging technologies including heat-assisted magnetic recording (HAMR), microwave-assisted magnetic recording (MAMR), and 2-D magnetic recording (TDMR). Previous experimental studies of both static touchdown technique and theoretical developments of the wave-based phonon conduction have shown enhanced heat transfer at the HDI. To better understand the heat transfer behavior across the HDI, a series of the simulation is necessary to connect the theory and the detailed geometric model of the HDI. In this article, we developed a finite-element model to explain the temperature change of the head during a static touchdown experiment. The wave-based phonon conduction theory is integrated into the simulation through iteration. The simulation results trend in agreement with the theoretical development and the experimental results. This simulation strategy can also be implemented for flying heads to predict the heat transfer behavior under HAMR conditions.
AB - Understanding the heat transfer behavior at the nanoscale head-disk interface (HDI) in hard disk drives is crucial for head design, media design, and failure analysis of the current hard disk drive (HDD) industry, especially for the emerging technologies including heat-assisted magnetic recording (HAMR), microwave-assisted magnetic recording (MAMR), and 2-D magnetic recording (TDMR). Previous experimental studies of both static touchdown technique and theoretical developments of the wave-based phonon conduction have shown enhanced heat transfer at the HDI. To better understand the heat transfer behavior across the HDI, a series of the simulation is necessary to connect the theory and the detailed geometric model of the HDI. In this article, we developed a finite-element model to explain the temperature change of the head during a static touchdown experiment. The wave-based phonon conduction theory is integrated into the simulation through iteration. The simulation results trend in agreement with the theoretical development and the experimental results. This simulation strategy can also be implemented for flying heads to predict the heat transfer behavior under HAMR conditions.
KW - Head-disk interface (HDI)
KW - nanoscale heat transfer
KW - simulation
KW - static touchdown
UR - http://www.scopus.com/inward/record.url?scp=85081098867&partnerID=8YFLogxK
U2 - 10.1109/TMAG.2019.2960262
DO - 10.1109/TMAG.2019.2960262
M3 - Journal article
AN - SCOPUS:85081098867
SN - 0018-9464
VL - 56
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 3
M1 - 8961204
ER -