公开(公告)号：JPH06215346A

公开(公告)日：1994-08-05

申请号：JP29622393

申请日：1993-11-26

Applicant: IBM

Inventor： MERII FURANSESU DOUANAA ,  KUWANGU KON KIMU ,  TOOMASU AARU SHIYATSU ,  ANDORIYUU CHIIUYAN TEINGU ,  CHIKUUANGU SHII WANGU ,  POOUEN WANGU

IPC: G11B5/66 ,  G11B5/64 ,  G11B5/73 ,  G11B5/738

Abstract: PURPOSE: To obtain a magnetic recording medium having improved coercive force and decreased low-frequency modulation by forming the lower layers of plural layers of two-layered surfaces and forming a first thin film of chromium and a second thin film of a chrome-vanadium alloy. CONSTITUTION: This magnetic recording medium has a substrate 10 having the substrate surface thin film 14 of an NiP alloy deposited by a non-electrolytic treatment and a disk base body 12 of an AlMg alloy, a plurality of layers of the lower layers 20 (consisting of the thin films 22, 24) formed on this substrate 10 and a protective coating 40 formed on a magnetic layer 30 of a Co alloy. A layer 50 of a liquid lubricant is added thereto. The first thin film 22 of a plurality of layers of the lower layers 20 is Cr and the second thin film 24 is Cr80 V20 . These thin films are formed by deposition by sputtering. As a result, the magnetic recording disk of the thin film Co alloy having the greatly improved coercive force and the decreased low-frequency modulation is obtd.

公开(公告)号：JPS59127323A

公开(公告)日：1984-07-23

申请号：JP12705383

申请日：1983-07-14

Applicant: Ibm

Inventor： KUWANGU KON KIMU

IPC: H01H1/04 ,  H01H1/06 ,  H01L39/24

CPC classification number: H01L39/2406 ,  H01L27/18 ,  Y10S505/813 ,  Y10T428/12528 ,  Y10T428/12806 ,  Y10T428/12819 ,  Y10T428/12889

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.