公开(公告)号：JPS6478885A

公开(公告)日：1989-03-24

申请号：JP13453488

申请日：1988-06-02

Applicant: BASF AG

Inventor： EEBAAHARUTO KESUTAA ,  HARARUTO KUPERUMAIERU ,  HERUMUUTO SHIYUTAININGAA ,  HANSUUBERUTORAMU BUIIGEMAN

IPC: B41M5/26 ,  G11B7/24 ,  G11B7/243

Abstract: PURPOSE: To improve the manufacture, sensitivity and S/N ratio by adjusting a content of Au in a recording layer manufactured by spattering Au and at least one of specific metals onto a base at least two times, the average particle diameter of the particles generating the surface protuberance and the average phase depth to be specific values. CONSTITUTION: A recording layer comprising a base stable in size, Au and at least one of the metals selected from Ru, Rh, Rd, Ag, Cu, Re, Oc, Tr and Pt includes 15-85 wt.% of Au to the total amount of the recording layer, and has the surface protuberance with 10-200 mm of average particle diameter. Further the average phase thickness (d) is 5-300 nm when it is represented by a formula; d=(dmin +dmax )/2 (dmin is the average thickness of ten particles of the thinnest part of the recording layer, and dmax is the average thickness of ten particles of the thickest part).