IP Library › Granted Patent US 6,855,282
Granted Patent B2
US 6,855,282 · App. 09/777,269 · Granted Feb 15, 2005

Method of fabricating a lubricant-integrated load/unload ramp for a disc drive

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Quick Facts
Patent No.
US 6,855,282
App. No.
09/777,269
Granted
Feb 15, 2005
Kind
B2
Abstract

A method for fabricating a disc drive load/unload ramp incorporates a disc drive compatible lubricant as the mold releasing agent. A mold having a load/unload ramp cavity is sprayed with a predetermined amount of disc drive compatible lubricant so that the finished load/unload ramp exhibits a predetermined thickness of lubricant. Alternatively, a known amount of disc drive compatible lubricant is combined with the load/unload ramp polymer during the melting stage of the molding process to yield a load/unload ramp exhibiting a predetermined thickness of lubricant. In either case, the lubrication of the load/unload ramp is integrated into the fabrication process in order to obtain a one step finished pre-lubricated product.

Claims (9)

1. A method of fabricating a load/unload ramp for a disc drive, the method comprising:

(a) providing a load/unload ramp composition comprising a polymer and a lubricant selected from perfluororpolyether and derivatives thereof; and

(b) injecting the composition into a mold to form a load/unload ramp, wherein the amount of lubricant in the composition is sufficient to provide a layer of lubricant on a surface of the ramp with a thickness of between about 200 Å and about 500 Å.

2. The method according to claim 1 wherein the perfluoropolyether derivative is selected from the group consisting of 2-Tetraol and 2-Dol.

3. The method according to claim 1 wherein the amount of lubricant in the composition is sufficient to provide a layer with a thickness between about 200 Å and about 350 Å.

4. The method according to claim 1 wherein the amount of lubricant in the composition is sufficient to provide a layer with a thickness between about 200 Å and about 250 Å.

5. The method according to claim 1 wherein the amount of lubricant in the composition is 0.5% to 3%.

6. The method according to claim 1 wherein the composition further comprises a surfactant.

7. The method according to claim 1 wherein the lubricant is perfluoropolyether.

Assignments (8)
RELEASE OF SECURITY INTEREST Recorded Jul 23, 2025
From: THE BANK OF NOVA SCOTIA
To: SEAGATE TECHNOLOGY PUBLIC LIMITED COMPANY; SEAGATE TECHNOLOGY; SEAGATE TECHNOLOGY HDD HOLDINGS; I365 INC.; SEAGATE TECHNOLOGY LLC; SEAGATE TECHNOLOGY INTERNATIONAL; SEAGATE HDD CAYMAN; SEAGATE TECHNOLOGY (US) HOLDINGS, INC.
Reel/Frame 072193/0001 →
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS Recorded Jul 19, 2013
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT AND SECOND PRIORITY REPRESENTATIVE
To: SEAGATE TECHNOLOGY LLC; EVAULT INC. (F/K/A I365 INC.); SEAGATE TECHNOLOGY INTERNATIONAL; SEAGATE TECHNOLOGY US HOLDINGS, INC.
Reel/Frame 030833/0001 →
SECURITY AGREEMENT Recorded Mar 24, 2011
From: SEAGATE TECHNOLOGY LLC
To: THE BANK OF NOVA SCOTIA, AS ADMINISTRATIVE AGENT
Reel/Frame 026010/0350 →
RELEASE Recorded Jan 19, 2011
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: SEAGATE TECHNOLOGY HDD HOLDINGS; MAXTOR CORPORATION; SEAGATE TECHNOLOGY LLC; SEAGATE TECHNOLOGY INTERNATIONAL
Reel/Frame 025662/0001 →
SECURITY AGREEMENT Recorded May 15, 2009
From: MAXTOR CORPORATION; SEAGATE TECHNOLOGY LLC; SEAGATE TECHNOLOGY INTERNATIONAL
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT AND FIRST PRIORITY REPRESENTATIVE; WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT AND SECOND PRIORITY REPRESENTATIVE
Reel/Frame 022757/0017 →
RELEASE OF SECURITY INTERESTS IN PATENT RIGHTS Recorded Jan 4, 2006
From: JPMORGAN CHASE BANK, N.A. (FORMERLY KNOWN AS THE CHASE MANHATTAN BANK AND JPMORGAN CHASE BANK), AS ADMINISTRATIVE AGENT
To: SEAGATE TECHNOLOGY LLC
Reel/Frame 016967/0001 →
SECURITY AGREEMENT Recorded Aug 5, 2002
From: SEAGATE TECHNOLOGY LLC
To: JPMORGAN CHASE BANK, AS COLLATERAL AGENT
Reel/Frame 013177/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 5, 2001
From: FAYEULLE, SERGE JACQUES; ALT, ROBERT ALLEN
To: SEAGATE TECHNOLOGY LLP
Reel/Frame 011550/0684 →