IP Library Granted Patent US 8,315,009
Granted Patent B2
US 8,315,009 · App. 11/904,961 · Granted Nov 20, 2012

System and method for changing resonant frequency in hard disk drive components

Assignee: Hitachi Global Storage Technologies, Netherlands B.V.
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Quick Facts
Patent No.
US 8,315,009
App. No.
11/904,961
Granted
Nov 20, 2012
Kind
B2
Abstract

A method for changing resonance frequency of hard disk drive components to reduce electromagnetic interference and electrostatic discharge from said components. Electrically sensitive hard disk drive components having a high resonance frequency consistent with a resonance of present electromagnetic interference forces are determined. A damper material is layered to alter electrical properties of said hard disk drive components to limit the magnitude of electromagnetic interference potential of said electrically sensitive component. Electrically sensitive hard disk drive components having a high capacitance are determined. The damper material is layered to increase a volume of the material constitution of the hard disk drive components to alter a capacitance of the hard disk drive component.

Claims (11)

1. A method for changing resonance frequency of hard disk drive components to reduce electromagnetic interference and electrostatic discharge from said components, comprising:

determining electrically sensitive hard disk drive components having a high resonance frequency consistent with a resonance of present electromagnetic interference forces;

layering a damper material to alter electrical properties of said hard disk drive components to limit the magnitude of electromagnetic interference potential of said electrically sensitive component;

determining electrically sensitive hard disk drive components having a high capacitance; and

layering the damper material to increase a volume of the material constitution of the hard disk drive components to alter a capacitance of the hard disk drive component.

2. The method of claim 1 , further comprising:

determining a resistivity to an EMI or high frequency component of the hard disk drive component.

3. The method of claim 1 , further comprising:

determining a mass of the damper material to identify an electrostatic discharge limiting volume of the hard disk drive component.

4. The method of claim 1 , further comprising:

layering the damper material to alter electrical properties of said hard disk drive components to limit the magnitude of electrostatic discharge in said electrically sensitive component.

Assignments (7)
PATENT COLLATERAL AGREEMENT - A&R LOAN AGREEMENT Recorded Aug 21, 2023
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 064715/0001 →
PATENT COLLATERAL AGREEMENT - DDTL LOAN AGREEMENT Recorded Aug 21, 2023
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 067045/0156 →
RELEASE OF SECURITY INTEREST AT REEL 052915 FRAME 0566 Recorded Feb 8, 2022
From: JPMORGAN CHASE BANK, N.A.
To: WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 059127/0001 →
SECURITY INTEREST Recorded Feb 6, 2020
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A., AS AGENT
Reel/Frame 052915/0566 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 6, 2016
From: HGST NETHERLANDS B.V.
To: WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 040821/0550 →
CHANGE OF NAME Recorded Oct 25, 2012
From: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V.
To: HGST NETHERLANDS B.V.
Reel/Frame 029341/0777 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 27, 2007
From: BUMANLAG, NAPOLEON B.; GALINGGANA, ROGER F., JR.; LI, LLOYD HENRY; TAG-AT, RAY NICANOR
To: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V.
Reel/Frame 020165/0396 →
Continuity (1)
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