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Paper Abstract and Keywords
Presentation 2010-11-26 16:25
[Invited Talk] Fabrication of ridge-and-groove servo pattern consisting of self-assembled dots for 2.5Tb/in2 bit patterned media
Yoshiyuki Kamata, Akira Kikitsu, Naoko Kihara (Toshiba corp.)
Abstract (in Japanese) (See Japanese page) 
(in English) Bit patterned media (BPM) is fabricated by a directed self-assembled polymer mask. CoPt magnetic dots with 17 nm pitch (equivalent to 2.5 Tb/in2) consist of ridge-and-groove servo patterns as well as circular data tracks. Distribution of dot size and dot pitch is 16% and 15%, respectively. The position error signal (PES) is estimated numerically for the fabricated BPM. PES linearity was found to be fairly good in spite of large dot pitch deviation. Track following of a current read head to the fabricated BPM was successfully demonstrated. These results indicate that the ridge-and-groove servo has a high tolerance to the amplitude noise of the servo signal and is suitable for BPM. Further reduction of the dot size and dot pitch deviation will be necessary for the application to a 2.5Tb/in2 system which uses a read head with narrow read width.
Keyword (in Japanese) (See Japanese page) 
(in English) bit patterned media / self-assembled polymer / servo pattern / HDD / / / /  
Reference Info. ITE Tech. Rep.
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Conference Information
Committee IEICE-MRIS MMS  
Conference Date 2010-11-26 - 2010-11-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Waseda Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) HDD, etc 
Paper Information
Registration To IEICE-MRIS 
Conference Code 2010-11-MR-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Fabrication of ridge-and-groove servo pattern consisting of self-assembled dots for 2.5Tb/in2 bit patterned media 
Sub Title (in English)  
Keyword(1) bit patterned media  
Keyword(2) self-assembled polymer  
Keyword(3) servo pattern  
Keyword(4) HDD  
1st Author's Name Yoshiyuki Kamata  
1st Author's Affiliation Toshiba corporation (Toshiba corp.)
2nd Author's Name Akira Kikitsu  
2nd Author's Affiliation Toshiba corporation (Toshiba corp.)
3rd Author's Name Naoko Kihara  
3rd Author's Affiliation Toshiba corporation (Toshiba corp.)
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Speaker Author-1 
Date Time 2010-11-26 16:25:00 
Presentation Time 40 minutes 
Registration for IEICE-MRIS 
Paper #  
Volume (vol) vol.34 
Number (no)  
Date of Issue  

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