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Magnetic recording apparatus comprising disk with reduced thickness and reduced disk flatness

A technology of magnetic recording and coating thickness, applied in the direction of magnetic recording, magnetic recording layer, data recording, etc.

Pending Publication Date: 2021-11-09
WESTERN DIGITAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simply reducing the thickness of the disk has physical limitations and constraints that affect the performance of the disk and in many cases may prevent the disk from working properly with HDDs

Method used

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  • Magnetic recording apparatus comprising disk with reduced thickness and reduced disk flatness
  • Magnetic recording apparatus comprising disk with reduced thickness and reduced disk flatness
  • Magnetic recording apparatus comprising disk with reduced thickness and reduced disk flatness

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Embodiment Construction

[0019] In the following description, specific details are given to provide a thorough understanding of various aspects of the present disclosure. However, it will be understood by those skilled in the art that the various aspects may be practiced without these specific details. For example, circuits may be shown in block diagrams in order to avoid obscuring aspects with unnecessary detail. In other instances, well-known circuits, structures and techniques may not have been shown in detail so as not to obscure aspects of the present disclosure.

[0020] This disclosure describes magnetic storage devices (eg, disk drives, hard disk drives) that are configured to store information. The magnetic storage device includes a disk and a slider configured to slide over a surface of the disk. The disk includes a base having a first surface and a second surface, wherein the base has a base thickness. The disk includes a first coating disposed over a first surface of the substrate, wher...

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Abstract

The invention provides 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.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit to U.S. Patent Application No. 16 / 583,169, filed September 25, 2019, entitled "MAGNETIC RECORDING APPARATUSCOMPRISING DISK WITH REDUCED THICKNESS AND REDUCED DISK FLATNESS," which is incorporated by reference in its entirety at way incorporated into this article. technical field [0003] The present invention relates to a magnetic recording device, and more particularly to a magnetic recording device including a disc having a reduced thickness and a reduced disc flatness. Background technique [0004] A magnetic storage device such as a hard disk drive (HDD) is a storage device that stores data or information magnetically. High-capacity HDDs typically use multiple platters to store data. As the number of disks in an HDD increases, the thickness of one or more disks can be reduced in order to keep the size of the HDD the same or smaller. However, a disc includes many diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/73
CPCG11B5/73919G11B5/73921
Inventor 铃木正治J·M·比安基尼
Owner WESTERN DIGITAL TECH INC