Overview
Japan's Sony is ramping up large-scale production of laser diodes to increase the capacity of mechanical hard disk drives (HDDs), aiming to address rising storage demand from AI data centers.
Partnership and production
Beginning in May, Sony's semiconductor solutions division will work closely with Seagate to produce the laser diodes. The diodes are intended for use in 3.5-inch HDDs with capacities up to 30 TB, roughly double current models.
Investment and manufacturing expansion
Sony plans to invest about 5 billion JPY (approximately 33 million USD) to expand production facilities in Miyagi Prefecture, Japan, and in Thailand. The investment is intended to increase manufacturing capacity for the laser diodes.
Technical details
The approach uses focused laser heating with very high precision, targeting areas on the disk surface as small as one-millionth of a millimeter. By heating storage regions to 400 degrees or higher, the laser diode technology allows tighter data packing on the media, increasing areal density and expanding HDD capacity. Sony reports that this method also improves storage efficiency and reliability while reducing power consumption.
Market context
With rapid growth in global data generation, data centers face limits on space and power. Sony's laser diode technique aims to double storage capacity without increasing footprint and to reduce power consumption by around 40%, which could support more sustainable data center scaling amid rising demand from generative artificial intelligence and other applications.
Recent financials
For the third quarter of fiscal 2023, Sony reported revenue of 25.34 billion USD, a 22% year-over-year increase compared with the expected 24.62 billion USD. Adjusted earnings per share were 1.99 USD, ahead of the expected 1.65 USD. Sony also indicated plans to list its financial services unit in October 2025.
Strategic implications
Sony's collaboration with Seagate and the planned investments reflect a strategic push into higher-density storage technologies for large-scale data applications. The production of laser diodes for HDDs could offer data centers an option to increase capacity and improve energy efficiency without expanding physical infrastructure.
