Rinsing agent, and method for production of hard disk substrate
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United States of America Patent
Stats
-
Nov 17, 2015
Grant Date -
May 16, 2013
app pub date -
Jul 19, 2011
filing date -
Jul 26, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided are a rinsing agent to produce a hard disk substrate free from remaining abrasive grains as well as a pit defect on the surface thereof and a method for production of a hard disk substrate using such a rinsing agent. A rinsing agent of the present invention is rinsing solution containing colloidal silica as abrasive grains. Letting that the colloidal silica abrasive grains have a concentration C and an average grain size R (C and R are represented in weight % and nm, respectively), the concentration C and the average grain size R of the colloidal silica abrasive grains have a relation matching the following Expression (1):
First Claim
Other Claims data not available
Family
International Classification(s)
- 2011 Application Filing Year
- B24B Class
- 523 Applications Filed
- 423 Patents Issued To-Date
- 80.88 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B24B Class
- 0 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 17, 2027 |
