Pentax 2013 Annual Report Download - page 35

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Business Overview
Copyright 2013 © HOYA CORPORATION
3
4Promising outlook for heat-assisted magnetic
recording, a new technology that will support
further capacity growth
Further boosting market share through development
of next-generation products
Glass Memory Disks for Hard Disk Drives
Information Technology
The recording capacity of HDDs has grown rapidly in
the past five years. Owing to the spread of digital
cameras and smartphones, easily taking photos and
videos and viewing and sharing them via the Internet
have become more common. Such digital data has
been stored on HDDs in PCs and the cloud while the
recording capacity of HDDs has also grown from 160
gigaby tes (GB) through 250GB and 320GB to
500GB at present.
In anticipation of further capacity expansion, Hoya
aims to promote the development of high-spec glass
substrates that enable growth in memor y disk
storage density and further boost its market share.
New technologies are being developed to increase the recording capacity of HDD media. It has
been claimed that research and development related to heat-assisted magnetic recording (HAMR)
is being promoted as the next candidate for the current perpendicular magnetic recording
method. HAMR is a technology that magnetically records data on media by reducing the coercivity
using laser thermal assistance to heat the material when writing. It will be able to realize ultra-high
recording density of one terabyte per square inch. As media are heated at a high temperature at
the time of processing, glass substrates, which have excellent heat resistance, are said to be
suitable for disk substrates.
As the leading company in the glass substrate market, Hoya is developing glass substrates
compatible with heat-assisted technology ahead of its competitors and will continue to contribute
to the further growth of HDD capacity.