Reliability of PMN-PT piezoelectric material as an actuator for high density hard disk drive
| dc.contributor.author | Wattananukulchai, Parinya | |
| dc.contributor.author | Isarakorn, Don | |
| dc.date.accessioned | 2026-08-06T10:20:38Z | |
| dc.date.available | 2026-08-06T10:20:38Z | |
| dc.date.issued | 2018-07-02 | |
| dc.description.abstract | In the latest high-density hard disk drives (HDDs), the piezoelectric actuator of head gimbal assembly (HGA) is the key technology for precisely positioning the magnetic head. To increase HDD's areal density, a smaller track pitch and a faster spindle speed should be used but the faster the spindle rotates the larger the disturbance is. Hence, a newer PMN-PT piezoelectric actuator is needed to overcome the displacement bandwidth limitation restricted by the current PZT piezoelectric actuator. This paper investigated the reliability and performance of PMN-PT piezoelectric single crystal that was implemented on the a commercial HGA for the first time in an experiment. The objectives were to ensure that PMN-PT would not crack during the HDD assembly process and the performance of HDD equipped with this material was still reliable under thermal degradation. From the experiments on a prototype HGA, it was found that PMN-PT had a high degradation temperature of 150<sup>0</sup>C and was 2 times harder than PZT piezoelectric. | |
| dc.identifier.citation | Ecti Con 2018 15th International Conference on Electrical Engineering Electronics Computer Telecommunications and Information Technology, 188-192, 2018 | |
| dc.identifier.doi | 10.1109/ECTICon.2018.8619905 | |
| dc.identifier.other | 2-s2.0-85062228847 | |
| dc.identifier.uri | https://dspace.kmitl.ac.th/handle/123456789/8765 | |
| dc.source | Ecti Con 2018 15th International Conference on Electrical Engineering Electronics Computer Telecommunications and Information Technology | |
| dc.subject | HDD | |
| dc.subject | HGA | |
| dc.subject | PMN-PT | |
| dc.subject | PZT | |
| dc.subject | Thermal degration | |
| dc.title | Reliability of PMN-PT piezoelectric material as an actuator for high density hard disk drive | |
| dc.type | Conference Paper |