Pentax 2012 Annual Report Download - page 12

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Apart from their well-known use in notebook computers, hard disk drives
(HDDs) are also found in car navigation systems and digital video cameras. The
recording media for hard disk drives used in such mobile devices has to be able
to prevent data loss, which means it must have the ability to withstand vibration
and shock. Glass memory disks have superior shock-resistance characteristics
in comparison to the aluminum disks that are used in non-portable equipment.
HOYA, a pioneer in the development of the glass memory disks, manufactures
and sells the substrates (polished glass) of the glass disks. The majority of
sales are from 2.5-inch disks, which boast superior surface smoothness and
readiness for large-capacity HDDs. Due to these advantages, HOYA holds a
global market share of over 70% for these disks.
The HDD market is expected to continue expanding alongside growing demand
for even larger capacities in data storage, with HDDs remaining competitive in
terms of both price and reliability. This is despite the emergence of a number of
competing storage device technologies, including Internet-based cloud
computing and solid state drives (SSD) using flash memories. At the same time,
higher storage densities in HDDs will require glass disks of even higher quality.
Glass disks for HDDs
The capacity of HDDs has been growing rapidly, from 160 gigabytes (GB)
through 250GB to 320GB. Currently, products with a capacity of 500GB per
platter are being produced commercially. The capacity increase of HDDs
requires improvement in the quality of glass memory disks. In this environment,
HOYA will continue to respond to customer needs through the stable production
of high-quality products by taking advantage of its technological excellence.
Glass disk (substrate) plant in Vietnam
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ht 2012 © HOY
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CORPORATION
Glass Memory Disks for Hard Disk Drives
Growing Capacity of Glass Memory Disks