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1. 发明授权

US5576098A Thin film magnetic head 失效
标题翻译：薄膜磁头
公开(公告)号：US5576098A
公开(公告)日：1996-11-19
申请号：US085946
申请日：1993-07-06
申请人： Yuko Arimoto , Takabumi Fumoto , Keiji Okubo , Osamu Saito , Toyoji Ataka , Hisashi Yamasaki
发明人： Yuko Arimoto , Takabumi Fumoto , Keiji Okubo , Osamu Saito , Toyoji Ataka , Hisashi Yamasaki
IPC分类号： G11B5/31 , G11B5/66 , B32B5/16
CPC分类号： B82Y25/00 , G11B5/3109 , G11B5/3113 , G11B5/3153 , Y10S428/90 , Y10T428/1186 , Y10T428/265
摘要： A thin film magnetic head includes an upper magnetic core film and a lower magnetic core film laminated one on another through a magnetic gap layer. The upper and lower magnetic core films are multilayer thin films, respectively, each of which is composed of a plurality of magnetic thin film layers and a plurality of non-magnetic thin film layers, alternately laminated one on another. The magnetic core films and have single domain structures, respectively, and the use of such magnetic core films realizes a thin film magnetic head having high permeability at high frequencies and improved high frequency characteristics and attains high recording density.
摘要翻译：薄膜磁头包括通过磁隙层彼此层叠的上磁芯膜和下磁芯膜。上下磁芯膜是分别由层叠的多个磁性薄膜层和多个非磁性薄膜层构成的多层薄膜。磁芯膜分别具有单畴结构，并且使用这种磁芯膜实现了在高频下具有高磁导率和改善的高频特性并获得高记录密度的薄膜磁头。

2. 发明授权

US5382301A High permeability thin-film magnetic head and method of manufacture 失效
标题翻译：高磁导率薄膜磁头及其制造方法
公开(公告)号：US5382301A
公开(公告)日：1995-01-17
申请号：US961395
申请日：1992-10-15
申请人： Keiji Ohkubo , Yuko Arimoto , Hiroyuki Uwazumi , Hisashi Yamasaki
发明人： Keiji Ohkubo , Yuko Arimoto , Hiroyuki Uwazumi , Hisashi Yamasaki
IPC分类号： G11B5/31 , H01F1/153 , H01F41/22
CPC分类号： G11B5/3113 , G11B5/3163 , H01F1/15341 , Y10T29/49034
摘要： A thin-film magnetic head is disclosed that includes a lower magnetic core and an upper magnet core formed on the surface of a substrate and connected together at a first end thereof, a magnetic gap is formed between the lower and upper magnetic cores at a second end thereof, and a coil-form electric conductive layer is located between the lower magnetic core and the upper magnet core. The lower and upper magnetic cores have a saturated magnetic flux density from 10,000 G to 18,000 G, while the magnetic permeability along the magnetic path of the magnetic head is 3,000 or higher at a frequency of 10 MHz. The unique characteristics of the magnetic head are obtained by heating an arrangement comprising the lower and upper magnetic cores, the magnetic gap layer, and the electric conductive layer to a temperature above 325.degree. C., and applying an external magnetic field greater than 0.01 kOe to the lower and upper magnetic cores to relax their magnetic anisotropy as the lower and upper magnetic cores are cooled during the manufacturing process.
摘要翻译：公开了一种薄膜磁头，其包括形成在基板的表面上的下磁芯和上磁芯，并在其第一端连接在一起，在下磁芯和上磁芯之间形成磁隙，第二并且线圈形导电层位于下磁芯和上磁心之间。下磁芯和上磁芯具有10,000G至18,000G的饱和磁通密度，而磁头的磁路的磁导率在10MHz的频率下为3,000或更高。通过将包括下磁芯和上磁芯，磁隙层和导电层的装置加热到高于325℃的温度，并施加大于0.01kOe的外部磁场，获得磁头的独特特性到下磁芯和上磁芯，以在制造过程中随着下磁芯和上磁芯的冷却而松弛其磁各向异性。

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