Stock material or miscellaneous articles – Magnetic recording component or stock – Magnetic recording media substrate
Reexamination Certificate
2003-06-02
2008-12-09
Chaney, Carol (Department: 1794)
Stock material or miscellaneous articles
Magnetic recording component or stock
Magnetic recording media substrate
C428S409000, C501S066000
Reexamination Certificate
active
07462411
ABSTRACT:
A substrate for an information recording medium, which substrate is made of a highly heat-resistant and low-alkali-elution glass and is suitable as a substrate for forming a perpendicular-magnetic-recording-mode layers thereon at a high temperature with a sputtering machine, the substrate being made of an alkali-metal-oxide-containing glass having a glass transition temperature (Tg) of 620° C. or higher and satisfying a requirement that the alkali ion elution amount per a unit area when the glass is immersed in water having a temperature of 80° C. for 24 hours is 0.2 μmol/cm2or less, an information recording medium having an information recording layer formed on the substrate, and a process for producing the information recording medium.
REFERENCES:
patent: 5391622 (1995-02-01), Ho et al.
patent: 5846280 (1998-12-01), Speit
patent: 6332338 (2001-12-01), Hashimoto et al.
patent: 6413892 (2002-07-01), Koyama et al.
patent: 6627566 (2003-09-01), Zou
patent: 6818576 (2004-11-01), Ikenishi et al.
patent: 2001/0038930 (2001-11-01), Yamamoto et al.
patent: 2002/0010066 (2002-01-01), Nakashima et al.
patent: 2002/0022564 (2002-02-01), Minamikawa et al.
patent: 2002/0031670 (2002-03-01), Goto et al.
patent: 1-239036 (1989-09-01), None
patent: 10-067537 (1998-03-01), None
patent: 10-083531 (1998-03-01), None
patent: 10-255246 (1998-09-01), None
patent: 11-11974 (1999-01-01), None
patent: 11-060265 (1999-03-01), None
patent: 11-180738 (1999-07-01), None
patent: 11-278864 (1999-10-01), None
patent: 2000-001330 (2000-01-01), None
patent: 2000-082211 (2000-03-01), None
patent: 2000-293844 (2000-10-01), None
patent: 2000-293846 (2000-10-01), None
patent: 2001-19466 (2001-01-01), None
patent: 2001-58843 (2001-03-01), None
patent: 2001-126234 (2001-05-01), None
patent: 2002-008222 (2002-01-01), None
patent: WO 99/06333 (1999-02-01), None
Ikenishi Mikio
Zou Xuelu
Chaney Carol
Falasco Louis
Hoya Corporation
Nixon & Vanderhye P.C.
LandOfFree
Substrate for information recording medium, information... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Substrate for information recording medium, information..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Substrate for information recording medium, information... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4048412