Title:
磁気エンコーダ用磁気媒体、磁気エンコーダ、並びに磁気媒体の製造方法
Document Type and Number:
Japanese Patent JP6387788
Kind Code:
B2
Abstract:
The present disclosure provides a magnetic medium, a magnetic encoder, and a method for manufacturing a magnetic medium with high reliability that can obtain the sufficient signal output, while reducing the hysteresis error. Disclosed is a magnetic medium relatively movable with respect to a magnetic sensor for detecting a magnetic field in a magnetosensitive face, the magnetic medium including: a signal magnetization region including a first magnetization region magnetized in a first direction being in parallel with the magnetosensitive face and a second magnetization region magnetized in a second direction opposed to the first direction, the first magnetization region and the second magnetization region being alternately arranged along the first direction or the second direction; and
a bias magnetization region magnetized in a third direction, the third direction intersecting both the first and second directions, and being in parallel with the magnetosensitive face, wherein
while a surface of the magnetic medium opposed to the magnetic sensor is placed to face upward,
the bias magnetization region is formed under the first magnetization region and the second magnetization region near an interface between the first magnetization region and the second magnetization region, and no bias magnetization regions are formed under the first magnetization region near a center of the first magnetization region and under the second magnetization region near a center of the second magnetization region.
Inventors:
Yasunori Abe
Kawakami Makoto
Kawakami Makoto
Application Number:
JP2014217577A
Publication Date:
September 12, 2018
Filing Date:
October 24, 2014
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
G01D5/245
Domestic Patent References:
| JP6312913A | ||||
| JP2009175073A | ||||
| JP200751901A | ||||
| JP5448575A | ||||
| JP37054A | ||||
| JP62103152A | ||||
| JP5940305A | ||||
| JP5940303A | ||||
| JP5312221A |
Attorney, Agent or Firm:
Samejima Mutsumi
Keiichi
Norihito Yamao
Keiichi
Norihito Yamao