Inventor
TASHIRO HIROKO
JP12 patents
Patents
12 patentsUS6548137B2Apr 15, 2003
Phase-change optical recording medium and recording method and apparatus for the same
RICOH KK60 citations96
US6426936B1Jul 30, 2002
Phase-change medium usable in phase-difference tracking
RICOH KK61 citations96
US6177167B1Jan 23, 2001
Optical information recording medium
RICOH KK51 citations96
US6841049B2Jan 11, 2005
Optical device substrate film-formation apparatus, optical disk substrate film-formation method, substrate holder manufacture method, substrate holder, optical disk and a phase-change recording type of optical disk
RICOH KK47 citations95
US6391417B1May 21, 2002
Optical information recording medium
RICOH KK36 citations92
US7260053B2Aug 21, 2007
Optical recording medium, process for manufacturing the same, sputtering target for manufacturing the same, and optical recording process using the same
RICOH KK14 citations83
US6777057B2Aug 17, 2004
Phase-change optical recording medium and recording method and apparatus for the same
RICOH KK6 citations73
US6741545B2May 25, 2004
Phase-change medium usable in phase-difference tracking
RICOH KK6 citations73
US7273534B2Sep 25, 2007
Optical device substrate film-formation apparatus, optical disk substrate film-formation method, substrate holder manufacture method, substrate holder, optical disk and a phase-change recording type of optical disk
RICOH KK4 citations62
US6884488B2Apr 26, 2005
Phase-change optical recording medium and recording method and apparatus for the same
RICOH KK2 citations62
US7366075B2Apr 29, 2008
Phase-change optical recording medium and recording method and apparatus for the same
RICOH KK0 citations52
US7102977B2Sep 5, 2006
Phase-change optical recording medium and recording method and apparatus for the same
RICOH KK0 citations52