| Author | Natthinee Sirichaisopon |
| Call Number | AIT Thesis no.ISE-13-39 |
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Science in
Microelectronics and Embedded Systems, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis; no.ISE-13-39 |
| Abstract | With conventional magnetic recording fast approaching the super-paramagnetic barrier in the quest for Areal Density (AD), shingled magnetic recording (SMR) is the candidate of the advance hard disk drive (HDD) technology to expose AD beyond 1TB/in2. Recording tracks in an overlapping pattern is the key concept for SMR. This study concerns the characterization of interference from neighboring tracks in such an arrangement in the presence of varying writing frequency. Linear density of the written track and the overlapping track pitch are the main variables in this study. There are three linear densities used, namely 191.8 KFCI (LF), 681.9 KFCI (MF) and 1278.5 KFCI (HF). The characteristic responses of Track Average Amplitude (TAA) and Noise amplitude are investigated.
Signal and Noise amplitude is characterized by SMR testing with the 80% overlapping track pitch. TAA and Noise are increased for the written pattern that overlapped with LF because the overlapping track is added and coherent phase with the previous track as shown in magnetic force measurement (MFM) profile. On the other hand, the amplitude tends to degrade in case of overlapping with HF or MF for both parameters because the anti-phase is produced, causing track-width reduction. The exception case, HF overlapping with MF scheme, shows little interference from the adjacent track for TAA signal but Noise amplitude is increased for this particular pattern. With the experimental result, high write density is recommended for shingled recording on component level testing. |
| Year | 2013 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis; no.ISE-13-39 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Microelectronics (ME) |
| Chairperson(s) | Bargmann, Brent; |
| Examination Committee(s) | Bohez, Erik L.J.;Bolido, Aileen Z. ; |
| Scholarship Donor(s) | Western Digital (Thailand) Co.,Ltd.;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2013 |