NDLI: Magnetic printing technology

Content Provider	IEEE Xplore Digital Library
Author	Ishida, T. Miyata, K. Hamada, T. Hashi, H. Ban, Y. Taniguchi, K. Saito, A.
Copyright Year	1965
Abstract	As the recording density of hard disk drives is being rapidly increased, the current servo track writing method using a conventional servo track writer has become more costly and technically difficult. In order to solve the problem, the authors propose a new magnetic contact duplication technology using a lithographically patterned master disk and discuss the printing process reliability for practical implementation to the product drives, in particular, from the viewpoint of master-slave contact issues. The air channel structure provided on the master disk surface allows close surface contact between the master and the slave disks, yielding very small amplitude modulation of the printed signal. The master disk was found durable over 1 million printing shots without giving any serious damage to the lithographically patterned ferromagnetic film. Moreover, organic and inorganic contamination tests show that the contact printing operation does not increase contamination on the printed disks. The magnetic printing technique can also be successfully applied to perpendicular recording media using the same master disk as for longitudinal media.
Sponsorship	IEEE Magnetics Society
Starting Page	628
Ending Page	632
Page Count	5
File Size	1258275
File Format	PDF
ISSN	00189464
Volume Number	39
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Printing Perpendicular magnetic recording Master-slave Servomechanisms Surface contamination Disk recording Magnetic recording Hard disks Writing Drives
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Magnetic Recording Performance of “Bit Printing Method” on PMR Media and Its Extendibility to the Higher Areal Density

Printed Media technology for an effective and inexpensive servo track writing of HDDs

Magnetic duplication for precise servo writing on magnetic disks

A novel magnetic contact duplication technique for servo-writing on magnetic disks

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Fundamental features of perpendicular magnetic recording and design considerations for future portable HDD integration

Disk drive integration issues for perpendicular recording

Advanced DC-free track code pattern using diphase code for perpendicular recording

Feasibility of Perpendicular Magnetic Printing at 1 Tb/in$^{2}$

Magnetic printing technology - application to HDD

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