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FE Malaysia Products

Hard Disk Drive
3.5inch vs 2.5inch
Longitudinal Magnetic
  Recording (LMR)
Perpendicular Magnetic
  Recording (PMR)
Insulated Gate Bipolar
  Transistor (IGBT)

3.5-inch vs 2.5-inch

At Fuji Electric Malaysia, we offer a series of media disks for our customers. They are 3.5-inch and 2.5-inch aluminum disks we now have on the market. The capacity of 3.5-inch aluminum disks used in desktop computers and HDD recorders normally ranges from 500GB to 1TB per disk. They are installed into hard disk drives and then are sold to end users in the market.

Up to date, we mass-produce and supply 3.5-inch high recording density perpendicular platter aluminum disks, ranging from 500GB to 1TB for consumer-based hard drives. We also manufacture high-quality aluminum substrates for the aluminum disks, some of which are now on the market as well.

Besides 3.5-inch aluminum disks and 2.5-inch aluminum disks which are for portable computers, we have also developed 2.5-inch glass disks with capacity of 375GB to 500GB per disk. These smaller disks are used in a growing number of applications such as notebook computers, home game consoles, car navigation systems and demand is expected to rise further.

The most crucial element of a magnetic disk is the read/write head interface. While keeping pace with the evolution of head devices, Fuji Electric has developed zone texture technology, which minimizes the flyable height of the head, as the key technology for high-density recording. Abreast with head devices technology, we employ the latest technology, i.e. perpendicular magnetic recording technology (PMR) to achieve higher recording density in our products.

Hard disk drives (HDD) are the most widely used non-volatile recording media for storing digital data because of it’s low cost and it’s ability to store up to several hundreds (or even thousands) of Gigabytes (GB) per disk. A typical HDD on a desktop can have up to 3-4 platters of magnetic disks per drive. For example, if you have a 3TB HDD (abreast with current technology), you would most probably have 3 magnetic disks in your HDD, with each of them having the capacity of storing about 1TB of data per platter.
Given that, FEM has increased its range of products from a measly 300GB per disk to approximately 1TB per disk, an increase of 300% of data storage space over the past decade.

How is data stored onto the magnetic disks? Data is stored by applying a magnetic flux onto the magnetic disk, making a part of the surface of the disk magnetized. A side-view of the magnetic disk is as below. This part of the magnetized disk can be considered as a very small magnet, and in this magnet is where you keep your data such as music, movies, document files and etc.


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