Patent ID: 7609603
Filing Date: 2009-10-27
Classification: G11B,Y10T

Abstract:
1. A recording method for a rewritable optical recording medium, which comprises: recording information on a rewritable optical recording medium by a plurality of record mark lengths and space lengths between record marks based on runlength limited (RLL) non-return-to-zero inverted (NRZI) modulation system; irradiating, between record marks, a laser beam having an erasing power Pe capable of crystallizing an amorphous phase to form spaces between record marks; when a time length of one record mark is represented by nT (where T is a reference clock period), for a record mark of n=2m (where m is an integer of at least 1), a time length (n−j)T (where j is a real number from −2.0 to 2.0) of the n=2m record mark is divided into m sections of α applying a laser beam having a bias power Pb within a time of β when m≧3, for a record mark of n=2m, when a start time for an nT mark is represented by T (i) generating α (ii) alternately generating within i=2 to m, β (iii) generating β for a record mark of n=2m+1, when a start time for an nT mark is represented by T (i) generating α (ii) alternately generating within i=2 to m, β (iii) generating β with the same m, for a record mark of n=2m and a record mark of n=2m+1, T