公开(公告)号：JPH02281414A

公开(公告)日：1990-11-19

申请号：JP6286890

申请日：1990-03-15

Applicant: IBM

Inventor： RICHIYAADO HENRII AARERUTO ,  JIEEMUZU KENTO HAWAADO ,  SUTEIBUN YUUJIN RANBAATO ,  IAN RIYUUZU SANDAAZU

IPC: G11B5/673 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/716 ,  G11B5/738

Abstract: PURPOSE: To suppress noises down to the max. permissible level or below and to enable the recording of data at the max. linear density by making a magnetic recording layer have a laminated structure of relatively thin Copt alloy magnetic films or CoNi alloy magnetic films parted by relatively thin non-magnetic spacer films. CONSTITUTION: The laminated magnetic layer on a substrate consist of the alternate films of the magnetic films of a cobalt base contg. platinum or nickel in the alloy and non-magnetic spacer films. The laminated layers have >=2 sheets of the magnetic films and one sheet of the spacer film. The intrinsic medium noises of the laminated disk structure obtd. in such a manner are decreased at the high linear recording density and the advantage of the improved signal to noise ratio is best achieved when the non-magnetic spacer films are formed as thin as possible, i.e., the spacer films are maintained at the thickness sufficient for effectively shutting off the characteristics of the magnetic films to be adhered afterward.

公开(公告)号：JPH02230510A

公开(公告)日：1990-09-12

申请号：JP1513590

申请日：1990-01-26

Applicant: IBM

Inventor： RICHIYAADO HENRII AAREETO ,  JIEEMUZU KENTO HAWAADO ,  KUWANGU KON KIMU ,  IAN RIYUUZU SANDAAZU ,  ANSONII WAI U

IPC: G11B5/64 ,  G11B5/66 ,  G11B5/72 ,  G11B5/725 ,  G11B5/82

Abstract: PURPOSE: To make it possible for a slider to come into contact with a disk at the time of CSS action without damaging the any parts in a disk device by adding specific additives to a carbon film thereby improving the end wear property of the disk. CONSTITUTION: The film of the magnetic recording disk consisting of a thin-film metal alloy has amorphous carbon or carbon contg. hydrogen and a protective film contg. iron Fe, tungsten W or tungsten carbide WC has the relatively smooth and flat surface of the carbon. The smooth carbon surface has the many lumps of the additives slightly projecting above the surface. These lumps conceivably provide low static wear as the nature of the protective film. Such disk is applicable even to the hard disk device of a contact-start-stop CSS type using the disk of the thin-film metal alloy having the protective film. As a result, the effects of improving the protective film of the thin-film disk, solving the problem of sticking of the head and improving the durability are obtd.