| 发明名称 |
Implementing surface analysis test (SAT) function for microwave-assisted magnetic recording (MAMR) HDD with embedded contact sensor (ECS) and spin torque oscillator (STO) signals |
| 摘要 |
A method, apparatus, and system are provided for implementing enhanced surface analysis test (SAT) function for microwave assisted magnetic recording (MAMR) hard disk drives (HDDs) using embedded contact sensor (ECS) and spin-torque oscillator (STO) signals. A preamplifier circuit receives the embedded contact sensor (ECS) and spin-torque oscillator (STO) signals and compares the received ECS and STO signals to identify magnetic disk media defects including bumps or thermal-asperity (TA) defects and pits or hole defects. |
| 申请公布号 |
US8885274(B1) |
申请公布日期 |
2014.11.11 |
| 申请号 |
US201314057257 |
申请日期 |
2013.10.18 |
| 申请人 |
HGST Netherlands B.V. |
发明人 |
Furukawa Masaru;Xu Junguo;Li Jianhua;Satou Makoto;Takahashi Kenichiro |
| 分类号 |
G11B27/36 |
主分类号 |
G11B27/36 |
| 代理机构 |
|
代理人 |
Pennington Joan |
| 主权项 |
1. A method for implementing enhanced surface analysis test (SAT) function for microwave assisted magnetic recording (MAMR) hard disk drives (HDDs) comprising:
providing an embedded contact sensor (ECS) and a spin-torque oscillator (STO) sensor; simultaneously measuring an ECS signal and a STO signal in a single scan of a disk surface; and comparing the measured ECS and STO signals to identify magnetic disk media defects including thermal-asperity (TA) defects and hole defects. |
| 地址 |
Amsterdam NL |
