KR20140056109A - 니켈 합금을 포함하는 쉴드들을 갖는 자기 디바이스들 - Google Patents
니켈 합금을 포함하는 쉴드들을 갖는 자기 디바이스들 Download PDFInfo
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Abstract
Description
도 2는 트랜스듀싱 헤드의 에어 베어링 표면에 법선인 평면을 따라서 취해진 자기 트랜스듀싱 헤드 및 자기 디스크의 단면도이다.
도 3은 도 2의 자기 트랜스듀싱 헤드의 자기적으로 관련 엘리먼트들을 예시하는 층진(layered) 도면이다.
도 4a 및 도 4b는 10분간 400℃의 급속-열-어닐링(RTA) 프로세스 이전(도 4a) 및 이후(도 4b)의 NiFe쉴드의 투과 전자 현미경(TEM; transmission electron microscopy) 이미지들이다.
도 5a 및 도 5b는 10분간 400℃의 RTA 프로세스 이전(도 5a) 및 이후(도 5b)의 자신의 자기소거 상태(demagnetization state)에서 직사각형-형상의 쉴드의 자기 도메인 구조들을 나타내는 Kerr 현미경 이미지들을 나타낸다.
도 6a, 도 6b 및 도 6c는 NiFeNb의 자기 모멘트 상의 Nb 함량의 효과(도 6a), 다양한 어닐링 온도들에서 Nb 함량의 함수로서의 용이축 보자력(easy axis coercivity)(도 6b), 및 다양한 어닐링 온도들에서 Nb 함량의 함수로서의 곤란축(hard axis) 보자력(도 6c)을 나타내는 그래프들이다.
도 7은 교번하는 이중층들을 포함하는 예시적인 개시된 쉴드의 단면이다.
도 8a 및 도 8b는 NiFeX (도 8a) 및 NiFe (도 8b)의 XRD 스펙트럼들이다.
도 9a 및 도 9b는 2시간의 400℃(도 9a) 및 450℃(도 9b) 이후에 1㎛ 두께의 NiFeNb (Nb = 3.3 at%) 필름의 단면 결정 구조(grain structure)를 나타낸다.
도 10a 및 도 10b는 2시간의 400℃(도 10a) 및 450℃(도 10b) 이후에 NiFe의 TEM 이미지들을 나타낸다.
도 11은 400℃ 및 450℃ 어닐링 이후에 Nb 함량의 함수로서의 저항률을 나타낸다.
도 12a, 도 12b 및 도 12c는 어닐링의 상이한 스테이지들에서 1.0㎛ 두께의 NiFeNb (Nb = 1.1 at%) 필름의 히스테리시스 루프들을 나타낸다.
도 13a, 도 13b 및 도 13c는 증착됨에 따른(도 13a), 400℃에서의 2시간 어닐링 이후(도 13b), 및 450℃에서의 2시간 어닐링 이후(도 13c)의 유사한 컨디션들에서 스퍼터링된 NiFe 시트 필름들의 히스테리시스 루프들을 나타낸다.
도 14a, 도 14b, 도 14c, 도 14d, 도 14e, 및 도 14f는 하나의 이중층(도 14a), 2개의 이중층들(도 14b), 및 6개의 이중층들(도 14c)에 대한 400℃에서의 2시간 어닐링 이후의 히스테리시스 루프들; 및 하나의 이중층(도 14d), 2개의 이중층들(도 14e), 및 6개의 이중층들(도 14f)에 대한 450℃에서의 2시간 어닐링 이후의 히스테리시스 루프들을 나타낸다.
도 15는 증착됨에 따른 필름, 400℃ 어닐링 이후, 450℃ 어닐링 이후에 대한 라미네이션들의 수의 함수로서 NiFeNb/NiFe 이중층 필름의 보자력을 나타낸다.
도면들은 필수적으로 스케일링되지 않는다. 도면들에 이용된 유사한 숫자들은 유사한 컴포넌트들을 지칭한다. 그러나, 주어진 도면에서 컴포넌트를 지칭하기 위한 숫자의 이용이 동일한 숫자로 라벨링된 다른 도면에서의 그 컴포넌트를 한정하는 것으로 의도되지 않는다는 것을 이해해야 할 것이다.
Claims (20)
- 디바이스로서,
자기저항 센서(magnetoresistive sensor);
상부 쉴드; 및
하부 쉴드를 포함하고,
상기 자기저항 센서는 상기 상부 쉴드와 상기 하부 쉴드 사이에 위치되고,
상기 하부 쉴드 및 상기 상부 쉴드 중 적어도 하나는 NiFeX를 포함하고,
X는 Nb, Mo, Ta, 또는 W에서 선택되는,
디바이스. - 제 1 항에 있어서,
상기 하부 쉴드는 NiFeX를 포함하는,
디바이스. - 제 1 항에 있어서,
X는 약 7 원자 퍼센트(atomic percent)보다 크지 않은 양으로 NiFeX에 존재하는,
디바이스. - 제 1 항에 있어서,
X는 약 4 원자 퍼센트보다 크지 않은 양으로 NiFeX에 존재하는,
디바이스. - 제 1 항에 있어서,
상기 하부 쉴드 및 상기 상부 쉴드 중 적어도 하나는 NiFeNb를 포함하는,
디바이스. - 제 5 항에 있어서,
Nb는 약 2 원자 퍼센트보다 크지 않은 양으로 NiFeNb에 존재하는,
디바이스. - 제 1 항에 있어서,
상기 하부 쉴드 및 상기 상부 쉴드 중 적어도 하나는 필수적으로 NiFeX로 구성되고,
X는 Nb, Mo, Ta, 또는 W로부터 선택되는,
디바이스. - 제 7 항에 있어서,
상기 하부 쉴드는 약 0.3μm 내지 약 2.5μm의 두께를 갖는,
디바이스. - 제 1 항에 있어서,
상기 하부 쉴드는 NiFe 및 NiFeX의 교번하는 층들을 포함하고,
X는 Nb, Mo, Ta, 또는 W로부터 선택되는,
디바이스. - 제 9 항에 있어서,
상기 NiFeX 층들은 약 5nm 내지 약 10nm의 두께를 갖는,
디바이스. - 제 9 항에 있어서,
NiFe의 적어도 4개의 층들 및 NiFeX의 적어도 4개의 층들이 존재하는,
디바이스. - 제 1 항에 있어서,
상기 디바이스는 상기 자기 저항 센서 및 상기 하부 쉴드 사이에 도메인 제어 피쳐를 더 포함하는,
디바이스. - 제 1 항에 있어서,
적어도 상기 하부 쉴드 또는 상기 상부 쉴드, 또는 둘 다는 합성 반강자성 부분(synthetic antiferromagnetic portion)을 더 포함하는,
디바이스. - 디바이스로서,
자기저항 센서;
상부 쉴드; 및
하부 쉴드를 포함하고,
상기 자기저항 센서는 상기 상부 쉴드와 상기 하부 쉴드 사이에 위치되고,
상기 하부 쉴드 및 상기 상부 쉴드 중 적어도 하나는 NiFeX를 포함하고,
X는 Nb, Mo, Ta, 또는 W로부터 선택되고,
적어도 상기 하부 쉴드 및 상기 자기저항 센서는 적어도 약 350℃의 온도에서 어닐링되었던,
디바이스. - 제 14 항에 있어서,
상기 하부 쉴드는 NiFe와 NiFeX의 교번하는 층들을 포함하고,
X는 Nb, Mo, Ta, 또는 W로부터 선택되는,
디바이스. - 제 15 항에 있어서,
NiFe의 적어도 4개 층들 및 NiFeX의 적어도 4개 층들이 존재하는,
디바이스. - 제 14 항에 있어서,
X는 Nb인,
디바이스. - 디바이스를 형성하는 방법으로서,
자기저항 센서 스택을 형성하는 단계;
전구체 디바이스를 형성하기 위해 전구체 하부 쉴드를 형성하는 단계 ― 상기 전구체 하부 쉴드는 NiFeX를 포함하고, X는 Nb, Mo, Ta, 또는 W로부터 선택됨 ―; 및
적어도 약 350℃의 온도에서 상기 전구체 디바이스를 어닐링하는 단계를 포함하는,
디바이스를 형성하는 방법. - 제 18 항에 있어서,
상기 전구체 하부 쉴드를 형성하는 단계는, NiFeX 및 NiFe의 교번하는 층들을 포함하는 스택을 형성하는 단계를 포함하는,
디바이스를 형성하는 방법. - 제 18 항에 있어서,
상기 어닐링하는 단계는 적어도 약 400℃의 온도에서 처리되는,
디바이스를 형성하는 방법.
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US13/666,255 US9183857B2 (en) | 2012-11-01 | 2012-11-01 | Magnetic devices having shields including a nickel alloy |
US13/666,255 | 2012-11-01 |
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US (1) | US9183857B2 (ko) |
EP (1) | EP2728578A3 (ko) |
JP (1) | JP2014093119A (ko) |
KR (1) | KR101553907B1 (ko) |
CN (1) | CN103811024B (ko) |
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US20150147481A1 (en) * | 2013-11-20 | 2015-05-28 | HGST Nertherlands B..V. | Method for making a scissoring-type current-perpendicular-to-the-plane (cpp) magnetoresistive sensor with exchange-coupled soft side shields |
US9196272B1 (en) * | 2014-10-27 | 2015-11-24 | Seagate Technology Llc | Sensor structure having increased thermal stability |
US20160365104A1 (en) * | 2015-06-15 | 2016-12-15 | Seagate Technology Llc | Magnetoresistive sensor fabrication |
US11377749B1 (en) | 2017-10-17 | 2022-07-05 | Seagate Technology Llc | Electrodeposition of high damping magnetic alloys |
US11152020B1 (en) * | 2018-05-14 | 2021-10-19 | Seagate Technology Llc | Electrodeposition of thermally stable alloys |
US11170807B1 (en) * | 2020-06-23 | 2021-11-09 | Western Digital Technologies, Inc. | Read head sensor with balanced shield design |
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JP3184465B2 (ja) | 1996-11-19 | 2001-07-09 | アルプス電気株式会社 | 薄膜磁気ヘッドおよびその製造方法 |
JPH10222813A (ja) * | 1997-01-31 | 1998-08-21 | Alps Electric Co Ltd | 薄膜磁気ヘッド |
JP2000235911A (ja) * | 1998-12-14 | 2000-08-29 | Fujitsu Ltd | 磁性材料およびそれを用いた磁気ヘッド並びに磁気記録装置 |
US6393692B1 (en) * | 1999-04-01 | 2002-05-28 | Headway Technologies, Inc. | Method of manufacture of a composite shared pole design for magnetoresistive merged heads |
US6524491B1 (en) * | 1999-04-26 | 2003-02-25 | Headway Technologies, Inc. | Double plate-up process for fabrication of composite magnetoresistive shared poles |
JP2000099929A (ja) | 1999-10-12 | 2000-04-07 | Alps Electric Co Ltd | 薄膜磁気ヘッド |
US6456467B1 (en) * | 2000-03-31 | 2002-09-24 | Seagate Technology Llc | Laminated shields with antiparallel magnetizations |
US7092208B2 (en) | 2002-07-11 | 2006-08-15 | Seagate Technology Llc | Magnetic transducers with reduced thermal pole-tip protrusion/recession |
US7170720B2 (en) * | 2003-08-28 | 2007-01-30 | Headway Technologies, Inc. | CPP read head for high density and shield noise suppression |
JP2007242786A (ja) * | 2006-03-07 | 2007-09-20 | Tdk Corp | Cpp型磁気抵抗効果素子 |
US9442171B2 (en) | 2008-01-09 | 2016-09-13 | Seagate Technology Llc | Magnetic sensing device with reduced shield-to-shield spacing |
US20090207534A1 (en) * | 2008-02-19 | 2009-08-20 | Tdk Corporation | Magneto-resistance effect element including stack with dual free layer and magnetized shield electrode layers |
US8238063B2 (en) | 2009-07-07 | 2012-08-07 | Seagate Technology Llc | Magnetoresistive sensor with synthetic antiferromagnetic cap or seed layers |
US8437105B2 (en) * | 2009-07-08 | 2013-05-07 | Seagate Technology Llc | Magnetic sensor with composite magnetic shield |
US9659585B2 (en) * | 2010-12-15 | 2017-05-23 | Seagate Technology Llc | Magnetic sensor seed layer with magnetic and nonmagnetic layers |
US8711525B2 (en) * | 2011-05-06 | 2014-04-29 | Seagate Technology Llc | Magnetoresistive shield with coupled lateral magnet bias |
US8921126B2 (en) * | 2013-01-25 | 2014-12-30 | Headway Technologies, Inc. | Magnetic seed method for improving blocking temperature and shield to shield spacing in a TMR sensor |
US8743507B1 (en) * | 2013-03-12 | 2014-06-03 | Seagate Technology Llc | Seed trilayer for magnetic element |
US8867175B1 (en) * | 2013-05-08 | 2014-10-21 | Seagate Technology Llc | Magnetic shield base lamination |
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- 2013-10-31 KR KR1020130131243A patent/KR101553907B1/ko not_active IP Right Cessation
- 2013-10-31 JP JP2013226400A patent/JP2014093119A/ja active Pending
- 2013-10-31 CN CN201310534313.0A patent/CN103811024B/zh not_active Expired - Fee Related
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US20140120374A1 (en) | 2014-05-01 |
US9183857B2 (en) | 2015-11-10 |
KR101553907B1 (ko) | 2015-09-17 |
CN103811024A (zh) | 2014-05-21 |
CN103811024B (zh) | 2018-01-19 |
JP2014093119A (ja) | 2014-05-19 |
EP2728578A3 (en) | 2015-03-25 |
EP2728578A2 (en) | 2014-05-07 |
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