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1. 发明授权

EP0350940B1 Method and apparatus for producing a magnetic recording medium 失效
标题翻译：用于制造磁记录介质的方法和装置。
公开(公告)号：EP0350940B1
公开(公告)日：1994-03-16
申请号：EP89112903.3
申请日：1989-07-13
申请人： MITSUBISHI KASEI CORPORATION
发明人： Komizo, Kazunaga , Ichikawa, Masatoshi , Sakuma, Takeshi , Yokoyama, Fumiaki , Yamaguchi, Yukio
IPC分类号： G11B5/84 , H01J37/34 , C23C14/42
CPC分类号： G11B5/851 , G11B5/8404

2. 发明公开

EP0350940A2 Method and apparatus for producing a magnetic recording medium 失效
标题翻译： Verfahren und Vorrichtung zur Herstellung eines magnetischenAufzeichnungsträgers。
公开(公告)号：EP0350940A2
公开(公告)日：1990-01-17
申请号：EP89112903.3
申请日：1989-07-13
申请人： MITSUBISHI KASEI CORPORATION
发明人： Komizo, Kazunaga , Ichikawa, Masatoshi , Sakuma, Takeshi , Yokoyama, Fumiaki , Yamaguchi, Yukio
IPC分类号： G11B5/84 , H01J37/34 , C23C14/42
CPC分类号： G11B5/851 , G11B5/8404
摘要： A method for producing a magnetic recording medium, which comprises forming, by sputtering, a thin undercoating layer and a thin cobalt alloy magnetic layer sequentially on a substrate, wherein an intermediate electrode is provided in the vicinity of the target to enclose at least 1/2 of the circumference of the sputter erosion end of the target, and at least one of the undercoating layer and the cobalt alloy magnetic layer is formed under such condition that a positive potential relative to the substrate and the grounded portion of the main body of the layer-forming apparatus, is applied to the intermediate electrode.
摘要翻译：一种磁记录介质的制造方法，其特征在于，在基板上依次形成薄的底涂层和薄的钴合金磁性层，其中在所述目标附近设置中间电极以至少包含1 / 2，靶的溅射侵蚀端的圆周的2个，并且底涂层和钴合金磁性层中的至少一个在这样的条件下形成，即相对于基板的正电势和主体的接地部分层形成装置施加到中间电极。

3. 发明公开

EP0435159A1 Longitudinal magnetic recording medium 失效
标题翻译： Langgestreckter磁铁Aufzeichnungsträger。
公开(公告)号：EP0435159A1
公开(公告)日：1991-07-03
申请号：EP90124823.7
申请日：1990-12-19
申请人： MITSUBISHI KASEI CORPORATION
发明人： Miyamoto, Yukihiro , Yokoyama, Fumiaki
IPC分类号： G11B5/712 , G11B5/704 , G11B5/706 , G11B5/66
CPC分类号： G11B5/656 , G11B5/7305 , Y10S428/90 , Y10S428/928 , Y10T428/12465 , Y10T428/1275 , Y10T428/12854 , Y10T428/12944 , Y10T428/265 , Y10T428/31
摘要： A longitudinal magnetic recording medium comprising a non-magnetic substrate having a texture with a central line average roughness Ra in a circumferential direction of at least 20 Å and a magnetic alloy layer comprising cobalt and chromium as the main components, formed on the substrate, wherein the magnetic alloy layer has (i) a feature that when the orientation degree of the hcp crystal structure is represented by the diffraction ray intensity of electron diffraction by transmission electron diffractiometry, the intensity ratio of the electron diffraction ring in the Co (002) plane between the circumferential direction and the radial direction of the substrate is at least 3, and (ii) a segregation structure having low chromium concentration regions surrounded by high chromium concentration regions, the diameters of the defined low chromium concentration regions being within a range of from 80 to 500 Å, and the number of the surrounded low chromium concentration regions being from 600 to 1,500 regions/µm².
摘要翻译：一种纵向磁记录介质，其特征在于，在所述基板上形成有非磁性基板，所述非磁性基板的圆周方向的中心线平均粗糙度Ra为至少20nm，磁性合金层为主要成分，磁性合金层具有（i）当通过透射电子衍射法测定电子衍射的衍射光强度来表示hcp晶体结构的取向度时，Co（002）面中的电子衍射环的强度比在基板的圆周方向和径向方向之间至少为3，以及（ii）具有由高铬浓度区域包围的低铬浓度区域的偏析结构，所定义的低铬浓度区域的直径在 80至500安格姆，以及包围的低铬浓度区域的数量为600〜1500个/亩2。

4. 发明授权

EP0435159B1 Longitudinal magnetic recording medium 失效
标题翻译：细长磁记录介质。
公开(公告)号：EP0435159B1
公开(公告)日：1994-03-09
申请号：EP90124823.7
申请日：1990-12-19
申请人： MITSUBISHI KASEI CORPORATION
发明人： Miyamoto, Yukihiro , Yokoyama, Fumiaki
IPC分类号： G11B5/712 , G11B5/704 , G11B5/706 , G11B5/66
CPC分类号： G11B5/656 , G11B5/7305 , Y10S428/90 , Y10S428/928 , Y10T428/12465 , Y10T428/1275 , Y10T428/12854 , Y10T428/12944 , Y10T428/265 , Y10T428/31

5. 发明公开

EP0350940A3 Method and apparatus for producing a magnetic recording medium 失效
标题翻译：制造磁记录介质的方法
公开(公告)号：EP0350940A3
公开(公告)日：1991-01-09
申请号：EP89112903.3
申请日：1989-07-13
申请人： MITSUBISHI KASEI CORPORATION
发明人： Komizo, Kazunaga , Ichikawa, Masatoshi , Sakuma, Takeshi , Yokoyama, Fumiaki , Yamaguchi, Yukio
IPC分类号： G11B5/84 , H01J37/34 , C23C14/42
CPC分类号： G11B5/851 , G11B5/8404
摘要： A method for producing a magnetic recording medium, which comprises forming, by sputtering, a thin undercoating layer and a thin cobalt alloy magnetic layer sequentially on a substrate, wherein an intermediate electrode is provided in the vicinity of the target to enclose at least 1/2 of the circumference of the sputter erosion end of the target, and at least one of the undercoating layer and the cobalt alloy magnetic layer is formed under such condition that a positive potential relative to the substrate and the grounded portion of the main body of the layer-forming apparatus, is applied to the intermediate electrode.

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