公开(公告)号：US06218028B1

公开(公告)日：2001-04-17

申请号：US09043610

申请日：1998-03-19

Applicant: Xing Song ,  Ga-Lane Chen ,  Charles Leu ,  Qixu Chen

Inventor： Xing Song ,  Ga-Lane Chen ,  Charles Leu ,  Qixu Chen

IPC: G11B566

CPC classification number: G11B5/7325 ,  C23C14/024 ,  C23C14/185 ,  C23C14/568 ,  G11B5/8404 ,  Y02T50/67 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/12896 ,  Y10T428/12903 ,  Y10T428/24355 ,  Y10T428/265 ,  Y10T428/30 ,  Y10T428/31678

Abstract: Reproducible texturing of magnetic recording media is enhanced by sputtering a buffer layer, such as Ni—P, on a nonmagnetic substrate, prior to sputtering a textured bump layer. A magnetic recording medium comprising a sputter textured metal layer and high coercivity is achieved by employing an underlayer, such as NiAl or FeAl, preferably a composite underlayer containing a chromium or chromium-alloy layer and a NiAl layer, on the sputter textured layer. Advantageously, the buffer layer, underlayer, textured bump layer, magnetic layer and carbon overcoat can be sputter deposited in a single apparatus.

公开(公告)号：US06045931A

公开(公告)日：2000-04-04

申请号：US922360

申请日：1997-09-03

Applicant: Xing Song ,  Ga-Lane Chen ,  Charles Chengyea Leu

Inventor： Xing Song ,  Ga-Lane Chen ,  Charles Chengyea Leu

IPC: G11B5/64 ,  G11B5/73 ,  G11B5/66

CPC classification number: G11B5/7325 ,  G11B5/656 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/1259 ,  Y10T428/12611 ,  Y10T428/1266 ,  Y10T428/12736 ,  Y10T428/12854 ,  Y10T428/265

Abstract: A magnetic recording medium comprising a cobalt-samarium magnetic alloy layer is formed having a high aerial recording density and exhibiting high coercivity, utilizing an underlayer with a thin nucleation layer thereon. Embodiments include sputter depositing a Cr or Cr alloy underlayer on a non-magnetic substrate, including alternative substrates, and sputter depositing a thin nucleation layer comprising Cr or a Cr alloy on the underlayer. A CoSm alloy layer is sputter deposited on the nucleation layer under substantially the same inert gas pressure as the nucleation layer, whereby Cr diffuses from the nucleation layer into and alloys with the CoSm magnetic alloy layer, thereby increasing media coercivity and corrosion resistance, and reducing media noise. A Cr overcoat on a CoSm alloy layer greatly reduces the oxidation of CoSm, thereby improving its corrosion resistance.

Abstract translation: 形成具有高的空气记录密度并显示高矫顽力的钴 - 钐磁性合金层的磁记录介质，利用其上具有薄的成核层的底层。 实施例包括在非磁性衬底上溅射沉积Cr或Cr合金底层，包括替代衬底，以及在底层上溅射沉积包含Cr或Cr合金的薄成核层。 在与成核层基本相同的惰性气体压力下，在成核层上溅射沉积CoSm合金层，由此Cr从成核层扩散到CoSm磁性合金层并与CoSm磁性合金层合金，从而提高介质矫顽力和耐蚀性，并减少 媒体噪音 CoSm合金层上的Cr外涂层大大降低了CoSm的氧化，从而提高了其耐腐蚀性。