Showa Denko Global Network

Our Technology

Media Manufacturing Process

Storage needs are exponentially growing in an IoT data driven world. It is expected that the data needs explosion will grow with a 30~ 40% annual growth rate. To keep up with this high areal density growth our R&D and manufacturing process are constantly upgrading processes and measurement tools to mass produce latest generation media with increasingly demanding quality.

STEP 1 - Substrates

3.5" aluminium or 2.5" glass substrates are processed.

STEP 2 - Surface Preparation

Substrates are polished to for the purpose of removing substrate level defects and reducing surface roughness for uniform mag crystal growth.

STEP 3 - Wash

All particulate contaminations must be removed and the disk surface must be perfectly clean and dry before entering the vacuum sputtering process.

STEP 4 - Sputter

Magnetic thin film layers are sputtered onto the disk surface. Areal densities for media are primarily determined by this process. Substrates take on magnetic properties after various layers of magnetic alloys are sputtered onto them. A carbon layer finish is applied to make the media more robust and durable.

STEP 5 - Lubrication

A layer of solvent based lubricants are coated over the disk surface to enhance durability and media reliability performance.

STEP 6 - Tape Burnish

An abrasive tape is used to remove any asperities on the disk before testing.

STEP 7 - Testing

Disk is sent for mechanical and parametric testing.

STEP 8 - Packing

All disks that pass testing are then sealed in a vacuum package, ready for shipment to customers.

Disclaimer: Manufacturing flow may be modified depending on program requirements.