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公开(公告)号：JP2002367153A
公开(公告)日：2002-12-20
申请号：JP2002150116
申请日：2002-05-24
Inventor： BIAN XIAOPING , DOERNER MARY FRANCES , MINVIELLE TIM , MIRZAMAANI MOHAMMAD TAGHI , TANG KAI
CPC classification number: G11B5/732 , G11B5/66 , G11B5/7325 , Y10S428/90 , Y10T428/12465 , Y10T428/12847 , Y10T428/12854 , Y10T428/12944 , Y10T428/24975 , Y10T428/265
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic disk which is improved in the medium saturation coercive force of a film structure by use of a CrNi preseed layer. SOLUTION: The thin-film magnetic disk is formed by sputtering the crystalline CrNi preseed layer on a substrate consisting of glass, etc., and in succession bonding an RuAl seed layer thereto. The CrNi preseed layer reduces particle sizes and their distribution, thereby improving the intra-surface crystal orientation, saturation coercive force (Hc) and signal-to-noise ratio(SNR). In an adequate embodiment, a lower layer of a Cr alloy is bonded in succession to the RuAl seed layer. In a more adequate embodiment, an onset layer and a magnetic layer or >=2 magnetic layers to be antiferromagnetically bonded across >=1 spacer layer are bonded in succession to the under layer of the Cr alloy. Since the crystalline CrNi preseed layer makes the use of the thinner RuAl seed layer possible, the particle size over the entire particularly is reduced and eventually the manufacturing cost of the magnetic disk occurring in relatively costly ruthenium is reduced. The CrNi preseed layer makes the use of the lower layer of the thinner Cr alloy possible and again contributes to the reduction of the particle size over the entire part.
Abstract translation: 要解决的问题：提供通过使用CrNi预置层来提高膜结构的中等饱和矫顽力的磁盘。 解决方案：薄膜磁盘是通过在由玻璃等组成的衬底上溅射晶体CrNi预置层而形成的，并且连续地将RuAl种子层结合在一起。 CrNi预制层减小了颗粒尺寸及其分布，从而改善了表面内晶体取向，饱和矫顽力（Hc）和信噪比（SNR）。 在合适的实施方案中，Cr合金的下层依次结合到RuAl种子层上。 在更合适的实施例中，跨越> = 1间隔层的反铁磁结合的起始层和磁性层或磁体层或> = 2个磁性层被连续接合到Cr合金的下层。 由于结晶CrNi预置层可以使用更薄的RuAl种子层，所以特别地整体上的粒子尺寸减小，最终在相对昂贵的钌中发生的磁盘的制造成本降低。 CrNi预制层使得可以使用更薄的Cr合金的下层，并且再次有助于在整个部分上减小粒度。
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公开(公告)号：JPH1173621A
公开(公告)日：1999-03-16
申请号：JP17829298
申请日：1998-06-25
Applicant: IBM
Inventor： BIAN XIAOPING , DOERNER MARY FRANCES , MIRZAMAANI MOHAMMAD TAGHI
Abstract: PROBLEM TO BE SOLVED: To obtain a multilayered magnetic layer exhibiting single switching operation with a smooth hysteresis loop by depositing a multilayered magnetic layer of two or more layers with crystalline orientation PO[1010] with min. changes in the coercive force Hc of each magnetic layer. SOLUTION: A seed layer 12 having B2 structural material, a nonmagnetic base layer 13 such as chromium and chromium alloy, a magnetic layer 14, a spacer layer 15, a magnetic layer 16 and a coating film 17 are sequentially deposited on a substrate 11. The seed layer 12 and the base layer 13 are required to enhance PO[1010] in the magnetic layers 14, 16. The magnetic layers 14, 16 consist of a cobalt alloy containing platinum and chromium and contain additional elements such as tantalum and boron, and for example, CoPtCrTa or CoPtCrB. Thereby, the two-layer multilayered magnetic film comprising the magnetic layers 14, 16 does not exhibit a two-mode switching effect, so that irregularity in the hysteresis loop can be prevented.
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公开(公告)号：SG60179A1
公开(公告)日：1999-02-22
申请号：SG1997004720
申请日：1997-12-29
Applicant: IBM
Inventor： BIAN XIAOPING , DOERNER MARY F , MIRZAMMAANI MOHAMMAD T , VO CHON N
Abstract: The present invention describes a disk drive and a thin film magnetic disk with improved recording performance of a magnetic medium having a thin seed layer material consisting of a CrTi alloy between the underlayer and the substrate. The seed layer thickness should be between 5-150 ANGSTROM with 5-30 ANGSTROM being preferable. The percentage of Ti should be greater than 5 at % with recording performance of the magnetic medium improving with increased percentage of Ti. The addition of Ti to Cr, increases the operable thickness range for the seed layer and, thereby, improves the manufacturability.
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公开(公告)号：SG71130A1
公开(公告)日：2000-03-21
申请号：SG1998001749
申请日：1998-07-10
Applicant: IBM
Inventor： BIAN XIAOPING , DOERNER MARY FRANCES , MIRZAMAANI MOHAMMAD TAGHI
Abstract: A thin film disk with laminated magnetic layers, for use in a disk drive, is described which exhibits a single switching behavior resulting in a smooth hysteresis loop. This is achieved by depositing a seed layer prior to depositing the Cr or Cr alloy underlayer. The seed layer material is selected to promote a Ä112Ü PO in the underlayer and subsequently a Ä1010Ü PO in the two or more laminated magnetic layers. The Ä1010Ü PO aids in maintaining minimal Hc variations between the magnetic layers. The seed layer can be a B2 type structure material such as NiA1 or FeA1 or any other material which results in the Ä112Ü PO in the underlayer. The underlayer is preferably Cr or a Cr alloy; the magnetic layers are preferably CoPtCr, CoPtCrTa or CoPtCrB. The spacer layer between the magnetic layers may be made from the same material as the underlayer, but may also be different, e.g. an hexagonal crystalline material such as Ru. The disks of the invention can be manufactured in standard high volume sputtering systems by virtue of the fact the magnetic layers have a reduced dependency on substrate temperature.
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