Patent ID: 7170840
Filing Date: 2007-01-30
Classification: G11B

Abstract:
1. An information recording method comprising the steps of: irradiating an energy beam to a recording medium; and generating a basic recording pattern for recording on the recording medium, the basic recording pattern having a first power level to provide a first state and a second power level which is higher than said first power level to provide a second state; wherein when a period of a recording timing generating clock in a recording mode is T, and a relative velocity of said energy beam and said recording medium is v; forming a first sequence of said second state with a length avT (first mark), said first state with a length ivT (first space) following said first mark, said second state with a length mvT (second mark) following said first space, said first state with a length jvT (second space) following said second mark and said second state with a length bvT (third mark) following said second space as a first small recording pattern; forming a second sequence which starts with said first state and ends with said first state while said first and second states appear alternately by a finite number of times as a second small recording pattern; forming a state in which said second small recording pattern follows said first small recording pattern as said basic recording pattern; forming a state in which said basic recording patterns are repeated as a recording pattern; forming said recording pattern which comprises said basic recording patterns obtained by changing a parameter j variously while parameters a, i and m are fixed, as a first recording pattern, wherein said parameters a, i, m and j are natural numbers; and forming said recording pattern which comprises said basic recording patterns obtained by changing said parameter i variously while a parameter b and said parameters j and m are fixed, as a second recording pattern, wherein said parameter b is a natural number.