Patent ID: 7132146

Claim:
An optical recording disk, comprising: a substrate; at least one recording layer, formed above said substrate; a light transmitting layer, formed above said recording layer; and a hard coat layer and/or a lubricant layer, formed above said light transmitting layer, wherein said recording disk is configured to have surface characteristics such that when an original plate for transfer of artificial fingerprint pattern is prepared by preparing an artificial fingerprint solution by mixing and stirring 0.4 weight parts of Kanto loam of Test Powder 1 Class 11 as defined in JIS Z8901, 1 weight part of triolein, and 10 weight parts of methoxypropanol, taking approximately 1 ml of said artificial fingerprint solution thus prepared to spin coating said artificial fingerprint solution onto a polycarbonate substrate, with a thickness of 1.1 mm and a diameter 120 mm, while spinning said polycarbonate substrate at 500 rpm for 3 seconds and then spinning said polycarbonate substrate at 250 rpm for 3 seconds, to form a coating film, and heating at 60° C. for 3 minutes, an artificial fingerprint transferring material is prepared by uniformly scouring an end face of a 12 mm diameter silicone rubber stopper using abrasive paper of base material Cw, polishing material A, and grain size P240 as defined in JIS R6252 and adhering said artificial fingerprint solution onto said scoured end face of said artificial fingerprint transferring material by pressing said end face of said artificial fingerprint transferring material against said original plate for transfer of artificial fingerprint pattern at a load of 29 N for 10 seconds, said end face of said artificial fingerprint transferring material, onto which said artificial fingerprint solution has been adhered, is pressed for 10 seconds at a load of 29 N against a position 40 mm in the radial direction from the center of said optical recording disk's light incidence surface, onto which laser light is to be made incident, to adhere said artificial fingerprint solution onto said light incidence surface, and an operation, of pressing an end face of a 16 mm diameter silicone rubber stopper across eight overlapped facial tissues against said light incidence surface, onto which said artificial fingerprint solution has been adhered, at a pressure 4.9 N and moving said light incidence surface and said silicone rubber stopper relative to each other to wipe off said artificial fingerprint solution that has been adhered onto said light incidence surface, is repeated five times, jitter becomes no more than 1.15 times that prior to the adhesion of said artificial fingerprint solution.