HOYA Corp., a producer of optical glasses from Japan, introduced this week that it has began development of its new manufacturing facility for exhausting disk glass substrates. These substrates could possibly be used to manufacture typical 2.5-inch HDD disks in addition to subsequent era disks for exhausting drives utilizing vitality assisted magnetic recording applied sciences (HAMR, MAMR).
The manufacturing facility will value HOYA roughly $ 30 billion ($ 270.5 million) and can start manufacturing in early 2020, in accordance with a media report. The plant is situated within the Saysettha Growth Zone (SDZ) in Laos and would be the third HOYA facility to provide glass substrates for exhausting drives. As the newest plant, the plant shall be utilizing the newest manufacturing gear and applied sciences to provide probably the most superior substrates, which is able to then be utilized by plate producers (eg Seagate, Showa Denko, Western Digital) for subsequent manufacturing HDD media , The opposite capacities for the manufacturing of substrates from HOYA are in Thailand and Vietnam.
Right this moment, exhausting disk glass substrates are used primarily to make media for two.5 "exhausting drives for laptops and information facilities. As gross sales of two.5-inch exhausting drives for notebooks lower resulting from cheaper SSDs, demand for these boards and substrates can also be declining. In the meantime, the usage of glass substrates and disks in three.5-inch drives has change into extra necessary as information middle HDD producers start to make use of them on each current and next-gen exhausting drives utilizing energy-assisted recording applied sciences. Glass substrates have an a variety of benefits over aluminum substrates: thinner, lighter, and stiffer, they broaden lower than aluminum upon heating and may be flattened. Ultimately, they’re extra preferable to subsequent era excessive capability HDDs.
Trendy exhausting drives with Vertical Magnetic Recording (PMR) expertise use aluminum or glass media with nanocannular CoCrPt-SiO2 magnetic movies. The researchers imagine that next-generation HDDs utilizing energy-assisted ultra-density imaging applied sciences (reminiscent of HAMR or MAMR) must swap to new kinds of media utilizing magnetic supplies with excessive magnetocrystalline anisotropy (reminiscent of L10-FePt, L10) – CoPt, Nd2Fe14B and SmCo5), specifically as a result of the construction of the brand new media should be certain that the grains used to report information are sufficiently small whereas the media takes into consideration excessive temperatures and different elements encountered in heat-assisted recording.
Scientists imagine that uncommon earth compounds are prone to oxidation and corrosion, they don’t seem to be appropriate for long-term storage of information. They at the moment think about a mix of glass substrate and L10-FePt to be probably the most promising for HAMR-based HDD media.
Contemplating that the sale of high-capacity exhausting disks for exascale information facilities is rising, the demand for glass substrates (with particular properties) for next-generation HDDs is sort of assured, which is why HOYA is investing within the new facility.
* See Extraordinarily Excessive-Density Magnetic Recording: Gaspare Varvaro and Francesca Casoli's Storage Supplies and Media Designs Printed by CRC Press
Picture credit: HOYA, Western Digital, Extremely Excessive-density Magnetic Recording: Storage Supplies and Media Designs by Gaspare Varvaro and Francesca Casoli, revealed by CRC Press