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October 30, 2008

Mtg: Current Magnetic Recording Media Performance and Future Challenges

by @ 11:37 am. Filed under ALL, Communications, Computers/Software, Electronics Design, NanoEngineering, Semiconductors

TUESDAY November 11, 2008
SCV Magnetics Chapter
Speaker: Tom Yamashita, VP-Engineering, Western Digital Media Operation
Time: Social/Pizza at 7:00 PM, Presentation at 7:30 PM
Cost: none
Place: Western Digital, 1710 Automation Parkway, San Jose
RSVP: not required

Thin film magnetic recording media made a large scale transition to PMR technology starting in 2006 at around 130-180 Gb/in2 areal density. This transition has been remarkably fast and effective. Just recently, we have announced a start of volume production of 400 Gb/in2 mobile HDD product. This allows 500 GB capacity in two platters for a notebook HDD. The key enabler to this transition was the use of “granular oxide” media. The general characteristics of PMR media design and their performance from the beginning in 2006 to the current state will be described. It is expected that current PMR design will carry us thru at least to the next generation at between 500-600 Gb/in2. At 800 Gb/in2 and beyond however, it is generally agreed that more radical changes in media design will be required. These include discrete track recording (DTR) and also potentially a change to higher Ku magnetic materials which are quite fundamentally different from todayĆ¢??s granular oxide media. These two new technologies make the next step in areal density increase one of the most daunting transitions ever undertaken by the media industry, perhaps rivaling the change from oxide to thin film media which occurred over 20 years ago. These challenges faced by the media technologist will be discussed to highlight some of the important considerations that have to be kept in mind, in order to make the new technologies a reality in a product.

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