Fujitsu Develops Optical Element for Thermal Assisted Magnetic Recording

Nov 28, 2006

Fujitsu Inc. announced the development of a multi-layered optical element for thermal assisted magnetic recording. Using this optical element, engineers were able to achieve a sub-hundred nanometer optical spot size, which is considered an enabling element for the successful deployment of one terabit per square inch recording technology for hard disk drives. This groundbreaking development was presented during the International Symposium on Optical Memory (ISOM) in Japan this past October.

In the Personal Computing and Consumer Electronics markets, demand for high capacity products is continuing to escalate. To address today’s needs, the HDD industry has implemented perpendicular magnetic recording (PMR) technology in order to increase the storage capacity of hard disk drives.

The merging of optical thermal assist and perpendicular recording is of high interest to the hard disk drive industry, as it enables manufacturers to reach capacities around ten times greater than what is now possible.

As research and development for Terabit recording continues, thermal assisted magnetic recording is considered to be one of the crucial technologies. For this method to work, it is essential to have a very small optical spot with high optical transmission efficiency on the recording media.

Successful implementation of thermal assisted recording technology also requires the following criteria:

-- Optical elements must be incorporated into the hard disk drive magnetic head manufacturing process.
-- Output beam size needs to be focused to an extremely small size to achieve the very high density recording at 1 Terabit per square inch (1 Tbit/in2).
-- High optical transmission efficiency is required to heat the recording spot to allow easier recording on high coercivity magnetic media.

Using a specially designed optical element, Fujitsu was able to attain a spot size of 88nm x 60nm with 17% optical efficiency. In this optical element, a multi-layered structure with an optical transmission layer was adopted. Fujitsu is the world’s first company to achieve a sub-hundred nanometer optical spot with a layered optical element.

"This achievement realized by Fujitsu with the multi-layered optical element is an exciting milestone for high density recording development, as well as for the storage industry as a whole," said Joel Hagberg, vice president, marketing and business development, Fujitsu Computer Products of America. "With this accomplishment, Fujitsu is paving the way for hard disk drive manufacturers to effectively meet the demands of PC and CE vendors for ultra-high capacity HDD products."

In order to attain terabit class recording, a combination of leading-edge technologies are required, and Fujitsu remains at the forefront with such accomplishments. During 2005-06, several new breakthroughs were announced in Japan, including: advancements in patterned media technology (June '05); a new lubricant that allows for lower flying height (April '06); and improvements in head material development (August '06). With this latest achievement in thermal assisted magnetic recording,

Source: Fujitsu

Explore further: German supercomputer is a world champion in saving engergy

add to favorites email to friend print save as pdf

Related Stories

Geologists cite hair as 'human provenance tool'

3 minutes ago

Scott Samson, professor of Earth sciences and a faculty fellow of the Forensic and National Security Sciences Institute (FNSSI), is leading a multiyear study of strontium (Sr), a metallic element found in ...

NSA Director: China can damage US power grid

7 minutes ago

China and "one or two" other countries are capable of mounting cyberattacks to shut down the electric grid in parts of the United States. That's according to Admiral Michael Rogers, the director of the National Security Agency ...

Protecting personal data in the cloud

23 minutes ago

IBM today announced it has patented the design for a data privacy engine that can more efficiently and affordably help businesses protect personal data as it is transferred between countries, including across private clouds.

Recommended for you

Namibia prepares for Africa's first e-vote

58 minutes ago

Namibia will vote in Africa's first electronic ballot Friday, a general election that will usher in a new president and quotas to put more women in government.

GoGlove wearable aims to control life's soundtracks

3 hours ago

Technology creatives are seeing the key attraction in wearables as being in solutions that save the user from fumbling around with the phone to make app adjustments or changes, or from repeatedly taking it ...

Amazon cuts Fire phone price to ignite sales

3 hours ago

Amazon on Wednesday slashed the price of Fire mobile phones that stalled after launch early this year, becoming a drag on the US online retail titan's bottom line.

Thanksgiving travel woes? There's an app for that

3 hours ago

Traveling by plane, train or automobile can be a headache. Mixing in Thanksgiving can make it a throbbing migraine. Technology provides some pain relief in the form of apps to let you know which roads are ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.