IP Library › Granted Patent US 7,064,922
Granted Patent B1
US 7,064,922 · App. 10/940,312 · Granted Jun 20, 2006

Disk drive with disks having different disk stiffness, thickness and material combinations

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Quick Facts
Patent No.
US 7,064,922
App. No.
10/940,312
Granted
Jun 20, 2006
Kind
B1
Abstract

An aspect of the invention can be regarded as a disk drive that includes a disk drive base and a spindle motor hub rotatably coupled to the disk drive base. The disk drive further includes a first disk disposed about the spindle motor hub and having a first disk stiffness. The disk drive further includes a second disk disposed about the spindle motor hub and having a second disk stiffness different than the first disk stiffness. According to another aspect of the present invention, the second disk has a second disk thickness different than a first disk thickness. According to another aspect of the present invention, the second disk is formed of a second material having a second material stiffness different than a first material stiffness.

Claims (18)

1. A disk drive comprising:

a disk drive base;

a spindle motor hub rotatably coupled to the disk drive base;

a first disk disposed about the spindle motor hub and formed of a first material having a first material stiffness; and

a second disk disposed about the spindle motor hub and formed of a second material having a second material stiffness different than the first material stiffness;

wherein the first disk has a first disk thickness, the second disk has a second disk thickness the same of the first disk thickness.

2. A disk drive comprising:

a disk drive base;

a spindle motor hub rotatably coupled to the disk drive base;

a first disk disposed about the spindle motor hub and formed of a first material having a first material stiffness; and

a second disk disposed about the spindle motor hub and formed of a second material having a second material stiffness different than the first material stiffness;

wherein the first disk is formed of a metallic substrate and the second disk is formed of a glass substrate.

3. A disk drive comprising:

a disk drive base;

a spindle motor hub rotatably coupled to the disk drive base;

a first disk disposed about the spindle motor hub and formed of a first material having a first material stiffness; and

a second disk disposed about the spindle motor hub and formed of a second material having a second material stiffness different than the first material stiffness;

wherein the first disk has a first disk stiffness, the second disk has a second disk stiffness substantially the same as the first disk stiffness.

Assignments (5)
RELEASE OF SECURITY INTEREST AT REEL 038744 FRAME 0481 Recorded Feb 8, 2022
From: JPMORGAN CHASE BANK, N.A.
To: WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 058982/0556 →
RELEASE OF SECURITY INTEREST Recorded Mar 5, 2018
From: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
To: WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 045501/0714 →
SECURITY AGREEMENT Recorded May 17, 2016
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 038722/0229 →
SECURITY AGREEMENT Recorded May 17, 2016
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 038744/0281 →
SECURITY AGREEMENT Recorded May 17, 2016
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 038744/0481 →