Patent ID: 6428396
Filing Date: 2002-08-06
Classification: G11B,Y10S

Abstract:
A method of producing a substrate for an information recording medium, said method including a washing/drying step of washing and drying said substrate subjected to precision polishing, said method comprising the steps of:obtaining a correlation between a contact angle of water on a surface of said substrate before said washing/drying step and a size of protrusions attached to the surface of said substrate during said washing/drying step; and controlling the contact angle of water on the surface of said substrate before said washing/drying step so that said protrusions have the size so as not to cause a hit when at least a recording layer is formed on the surface of said substrate to produce said information recording medium and when a slider provided with a recording device and/or a reproducing device is made to run on a surface of said information recording medium.