| 摘要 |
A method for forming an optical disk including, providing a substrate and an information recording layer on the substrate, and covering the information recording layer with a cover layer having light transmission properties such that a thickness t of the cover layer is determined based on a predetermined function f(n), which depends on a refractive index n of the cover layer, and the function f(n) is, <maths id="MATH-US-00001" num="1"> <MATH OVERFLOW="SCROLL"> <MROW> <MROW> <MROW> <MI>f</MI> <MO></MO> <MROW> <MO>(</MO> <MI>n</MI> <MO>)</MO> </MROW> </MROW> <MO>=</MO> <MROW> <MFRAC> <MROW> <MSUB> <MI>A</MI> <MN>1</MN> </MSUB> <MO>x</MO> <MSUP> <MI>n</MI> <MN>3</MN> </MSUP> </MROW> <MROW> <MO>(</MO> <MROW> <MSUP> <MI>n</MI> <MN>2</MN> </MSUP> <MO>-</MO> <MN>1</MN> </MROW> <MO>)</MO> </MROW> </MFRAC> <MO>x</MO> <MFRAC> <MROW> <MO>(</MO> <MROW> <MSUP> <MI>n</MI> <MN>2</MN> </MSUP> <MO>+</MO> <MSUB> <MI>A</MI> <MN>2</MN> </MSUB> </MROW> <MO>)</MO> </MROW> <MROW> <MO>(</MO> <MROW> <MSUP> <MI>n</MI> <MN>2</MN> </MSUP> <MO>+</MO> <MSUB> <MI>A</MI> <MN>3</MN> </MSUB> </MROW> <MO>)</MO> </MROW> </MFRAC> <MO></MO> <MSTYLE> <MTEXT> </MTEXT> </MSTYLE> <MO></MO> <MROW> <MO>(</MO> <MI>mm</MI> <MO>)</MO> </MROW> </MROW> </MROW> <MO>,</MO> </MROW> </MATH> </MATHS> in which, A 1 =0.049245, A 2 =-0.579135, and A 3 =0.012842, and constants t 1 and t 2 determine a range of the thickness t of the cover layer so that f(n)-t 1 <t<f(n)++t 2.
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