Patent
Method and system for measuring magnetic interference width
Changqing Shi,Jimmy Wong,David Terrill +2 more
- 23 Dec 2009
141
TL;DR: In this article, a method for measuring the magnetic interference width for a magnetic recording head is described, which includes writing a first track at a first frequency on a magnetic disk, writing a second track at the first frequency in the magnetic disk and writing a third track between the first track and the second track.
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Abstract: A method for measuring a magnetic interference width for a magnetic recording head is described. The method includes writing a first track at a first frequency on a magnetic disk, writing a second track at the first frequency on the magnetic disk, and writing a third track at a second frequency on the magnetic disk between the first track and the second track. The third track partially overlaps both the first track and the second track and the second frequency is different from the first frequency. The method further includes measuring a readback profile across the first, second and third tracks on the magnetic disk.
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Citations
Patent
Tunnel magnetoresistance read head with narrow shield-to-shield spacing
Rongfu Xiao,Guanxiong Li,Zhihong Zhang,Ming Mao,Chien Chen-Jung +4 more
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TL;DR: In this article, a tunnel magnetoresistance (TMR) read sensor with a tabbed AFM layer and an extended pinned layer is presented, and methods for making the same are provided.
141
Patent
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Christian Kaiser,Qunwen Leng,Mahendra Pakala +2 more
- 21 Feb 2012
TL;DR: In this article, the authors describe a novel tunnel magnetoresistive (TMR) deposition process that can enhance the signal-to-noise ratio (SNR) of a TMR reader.
137
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Hong Zhang,Ge Yi,Lei Wang,Dujiang Wan,Guanghong Luo,Xiaohai Xiang +5 more
- 27 Feb 2013
TL;DR: In this paper, a method and system for providing a magnetic recording transducer having a pole is described. But the method is based on the assumption that the pole has side(s), a bottom, and a top wider than the bottom.
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Method for providing a side shield for a magnetic recording transducer using an air bridge
Jinqiu Zhang,Feng Liu,Shaoping Li,Ming Sun +3 more
- 20 Dec 2011
TL;DR: In this article, a method for fabricating a side shield for a magnetic transducer having a non-magnetic layer and an ABS location corresponding to an ABS is described, and a pole is formed.
137
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Magnetic etch-stop layer for magnetoresistive read heads
Mahendra Pakala,Rongfu Xiao,Chando Park +2 more
- 22 Nov 2013
TL;DR: In this article, a tunneling magnetoresistive read head was constructed over a shield layer, where the magnetic etch-stop layer comprises a nonmagnetic metal and a soft magnetic material with overall property still being magnetically soft.
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References
Patent
Method and apparatus for determining the magnetic track width of a magnetic head
Peter Cheng-I Fang,Terence Tin-Lok Lam,Zhong-heng Lin +2 more
- 11 Jul 2002
TL;DR: In this article, a method of determining the magnetic write width of a magnetic head is described. But it is not necessary to obtain the micro-track profile to determine these side reading values.
27
Patent
System and method for measuring total track width of a test track in magnetic media
Hans Jurgen Richter
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TL;DR: In this article, a method for measuring the total track width of a test track and adjacent erase bands written over an erased area of magnetic media is disclosed, where the remaining signal strength is stored as a data value as a function of the position of the erase.
22
Patent
Method and apparatus for preventing adjacent track erase in HDD
Dae-Il Kim,Jung Jae Myeong +1 more
- 22 Sep 2003
TL;DR: In this paper, a write command is received, an ambient temperature of a hard disc drive is measured, and whether the ambient temperature exceeds a threshold temperature is determined, and the intensity of a write current is adjusted according to the position of a magnetic head on the drive.
21
Patent
Magnetic recording/reproducing device
Hideki Zaitsu,Takehiko Hamaguchi,Futoshi Tomiyama +2 more
- 10 Feb 2000
TL;DR: In this paper, a magnetic recording/reproducing device is described in which a reproduce head is positioned where the crosstalk between adjacent tracks in a magnetic disk is minimized to maintain an adequate transfer rate.
19
Patent
Method and apparatus to distinguish effects of adjacent track encroachment from head thermal movement
Zhaohui Li,Geng Wang,Keung Youn Cho +2 more
- 15 Oct 2001
TL;DR: In this article, the authors present a method and system to determine a quality of a head in a hard disk drive by writing on a predetermined track on the plurality of tracks and reading a profile of the predetermined track to provide a first profile value.
17