US Patent Application 18233497. MAGNETIC RECORDING APPARATUS COMPRISING DISK WITH REDUCED THICKNESS AND REDUCED DISK FLATNESS simplified abstract

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MAGNETIC RECORDING APPARATUS COMPRISING DISK WITH REDUCED THICKNESS AND REDUCED DISK FLATNESS

Organization Name

Western Digital Technologies, Inc.

Inventor(s)

Shoji Suzuki of San Jose CA (US)

John Michael Bianchini of Los Altos CA (US)

MAGNETIC RECORDING APPARATUS COMPRISING DISK WITH REDUCED THICKNESS AND REDUCED DISK FLATNESS - A simplified explanation of the abstract

This abstract first appeared for US patent application 18233497 titled 'MAGNETIC RECORDING APPARATUS COMPRISING DISK WITH REDUCED THICKNESS AND REDUCED DISK FLATNESS

Simplified Explanation

The patent application describes a disk for a magnetic recording apparatus.

  • The disk has a substrate with a first surface and a second surface, and it has a certain thickness.
  • The first surface of the substrate is coated with a first coating layer, which also has a certain thickness.
  • The second surface of the substrate is coated with a second coating layer, which also has a certain thickness.
  • The overall thickness of the disk includes the thickness of the substrate.
  • The maximum difference in thickness between the first coating layer and the second coating layer is determined by the square of the disk thickness.


Original Abstract Submitted

A disk for a magnetic recording apparatus. The disk includes a substrate comprising a first surface and a second surface, wherein the substrate has a substrate thickness. The disk includes a first coating layer disposed over the first surface of the substrate, wherein the first coating layer has a first coating layer thickness. The disk includes a second coating layer disposed over the second surface of the substrate, wherein the second coating layer has a second coating layer thickness. The disk has a disk thickness, wherein the disk thickness includes the substrate thickness. The maximum thickness difference between the first coating layer thickness and the second coating layer thickness is a function of the square of the disk thickness.

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