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Title:
ALUMINUM ALLOY SPACER AND METHOD FOR MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2010160857
Kind Code:
A
Abstract:

To provide an aluminum alloy spacer which does not have alumite film while being securable good flatness of an aluminum alloy blank, and does not stick fast to an aluminum alloy blank at stacking and annealing time and to provide a manufacturing method thereof.

The aluminum alloy spacer is used in order to correct flatness of the aluminum alloy blank for magnetic disks. The flatness of the aluminum alloy spacer is 2 μm or less, and a bearing ratio of the surface of the aluminum alloy spacer from a maximum height of projection formed by roughening to a depth of 2 μm is 30% or less.

COPYRIGHT: (C)2010,JPO&INPIT


Inventors:
KATO YOSHINORI
UMEDA HIDETOSHI
OTANI YUJI
Application Number:
JP2009003080A
Publication Date:
July 22, 2010
Filing Date:
January 09, 2009
Export Citation:
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Assignee:
KOBE STEEL LTD
International Classes:
G11B5/84; B24C1/06; C22F1/047; C25D11/16; C22F1/00
Domestic Patent References:
JPH0684170A1994-03-25
JP2008226377A2008-09-25
JP2004063028A2004-02-26
JP2000008131A2000-01-11
JPH09134515A1997-05-20
JP2002029772A2002-01-29
JPH10289446A1998-10-27
JP2000067432A2000-03-03
JP2005028813A2005-02-03
JPH04189465A1992-07-07
JP2002117532A2002-04-19
JP2007087460A2007-04-05
Attorney, Agent or Firm:
Isono Dozo
Etsuo Tada
Tetsuo Tomita



 
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