MY192900A - Polishing composition and method for producing magnetic disk substrate - Google Patents

Polishing composition and method for producing magnetic disk substrate

Info

Publication number
MY192900A
MY192900A MYPI2018703456A MYPI2018703456A MY192900A MY 192900 A MY192900 A MY 192900A MY PI2018703456 A MYPI2018703456 A MY PI2018703456A MY PI2018703456 A MYPI2018703456 A MY PI2018703456A MY 192900 A MY192900 A MY 192900A
Authority
MY
Malaysia
Prior art keywords
polishing composition
magnetic disk
abrasive
polishing
disk substrate
Prior art date
Application number
MYPI2018703456A
Inventor
Yokomichi Noritaka
OYAMA Takaharu
oshima Takahiro
Original Assignee
Fujimi Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujimi Inc filed Critical Fujimi Inc
Publication of MY192900A publication Critical patent/MY192900A/en

Links

Landscapes

  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

Provided is a polishing composition that allows effectively reducing the number of scratches present in a polished surface, while maintaining a high polishing rate. The polishing composition provided by the invention is used for polishing magnetic disk substrates. The polishing composition contains an abrasive, an acid, an oxidant, and water. The abrasive contains at least silica particles. An average primary particle size of the abrasive as measured in accordance with the BET method, is 1 nm to 50 nm. Further, the polishing composition has a pH of 1.8 to 3.0, and an amount of sodium hydroxide necessary for raising the pH by 1.0 is 0.03 mol/L to 0.2 mol/L.
MYPI2018703456A 2017-09-29 2018-09-24 Polishing composition and method for producing magnetic disk substrate MY192900A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017191464A JP7058097B2 (en) 2017-09-29 2017-09-29 Method for manufacturing polishing composition and magnetic disk substrate

Publications (1)

Publication Number Publication Date
MY192900A true MY192900A (en) 2022-09-14

Family

ID=66339065

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2018703456A MY192900A (en) 2017-09-29 2018-09-24 Polishing composition and method for producing magnetic disk substrate

Country Status (2)

Country Link
JP (1) JP7058097B2 (en)
MY (1) MY192900A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7638667B2 (en) * 2019-11-20 2025-03-04 株式会社フジミインコーポレーテッド Polishing composition, polishing method and method for producing substrate
JP7814106B2 (en) * 2021-03-31 2026-02-16 株式会社フジミインコーポレーテッド Polishing composition and method for producing magnetic disk substrate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4202157B2 (en) 2003-02-28 2008-12-24 株式会社フジミインコーポレーテッド Polishing composition
JP4202172B2 (en) 2003-03-31 2008-12-24 株式会社フジミインコーポレーテッド Polishing composition
JP2006077127A (en) 2004-09-09 2006-03-23 Fujimi Inc Polishing composition and polishing method using the composition

Also Published As

Publication number Publication date
JP2019065155A (en) 2019-04-25
JP7058097B2 (en) 2022-04-21

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