Patent ID: 6052340
Filing Date: 2000-04-18
Classification: G11B

Abstract:
An optical mastering disc recording apparatus for recording an information signal on an optical mastering disc, said optical mastering disc comprising a transparent substrate having a plurality of surfaces and a photoresist layer provided on one of the surfaces of said substrate, said optical mastering disc including a ring-shaped recording area on said one of the surfaces in which the information signal is recorded, said apparatus comprising:a turntable for carrying an optical mastering disc thereon;a motor for rotating and driving said turntable; andoptical means for irradiating a laser beam modulated by an information signal onto the recording area of said optical mastering disc, wherein said turntable is configured to be in contact with only a predetermined portion of the other surface of said substrate, said predetermined portion is opposite to a non-recording area located other than the recording area so as to prevent a laser beam reflected from said turntable from returning to said photoresist layer.