Method of and apparatus for manufacturing multi-layer optical information recording medium
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United States of America Patent
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Jun 4, 2013
Grant Date -
Mar 12, 2009
app pub date -
Nov 4, 2008
filing date -
May 10, 2002
priority date (Note) -
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Abstract
A transfer layer on a surface of a mold has a thickness distribution along the radius direction that the layer is thick in an inner round portion but is gradually thinner toward an outer round portion. An adhesive layer is formed between a surface of a signal substrate which bears a signal recording film and the mold which seats the transfer layer. The adhesive layer has a thickness distribution that the layer is thin in an inner round portion but is gradually thicker toward an outer round portion. Since the thickness distributions along the radius direction of the transfer layer and the adhesive layer are opposite to each other, the thickness distribution of an isolation layer which comprises the two layers is uniform.
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