Near field transducer having an adhesion layer coupled thereto

Patent metadata

Field	Value
Publication number	US-2016372140-A1
Application number	US-201514741390-A
Country	US
Kind code	A1
Filing date	Jun 16, 2015
Priority date	Jun 16, 2015
Publication date	Dec 22, 2016
Grant date	—

Abstract

A system, according to one embodiment, includes a near field transducer; an adhesion layer on a media facing side of the near field transducer, the adhesion layer comprising Ni and Cr; and a protective layer on a media facing side of the adhesion layer. Other systems and methods are described in additional embodiments.

First claim

1 . A system, comprising:
a near field transducer; an adhesion layer on a media facing side of the near field transducer, the adhesion layer comprising Ni and Cr; and a protective layer on a media facing side of the adhesion layer.

2 . The system as recited in claim 1 , wherein a ratio of Ni to Cr in the adhesion layer is in a range of 75:25 to 25:75 on an atomic percentage basis.

3 . The system as recited in claim 1 , wherein a deposition thickness of the adhesion layer is between 2 and 16 angstroms.

4 . The system as recited in claim 1 , wherein a deposition thickness of the adhesion layer is between 2 and 6 angstroms.

5 . The system as recited in claim 1 , wherein the near field transducer comprises gold.

6 . The system as recited in claim 1 , wherein the near field transducer has a notch.

7 . The system as recited in claim 1 , wherein at least one component of the adhesion layer is nitrided.

8 . The system as recited in claim 7 , wherein a ratio of Ni to Cr in the adhesion layer is in a range of greater than 0:1 to about 67:33 on an atomic percentage basis.

9 . The system as recited in claim 1 , wherein the protective layer comprises silicon nitride.

10 . The system as recited in claim 1 , comprising:
a magnetic medium; a drive mechanism for passing the magnetic medium over the near field transducer; and a controller electrically coupled to a magnetic head having the near field transducer.

11 . A system, comprising:
a near field transducer for heating a magnetic medium; a light source for illuminating the near field transducer; a write pole adjacent the near field transducer; an adhesion layer on a media facing side of the near field transducer, the adhesion layer comprising Ni and Cr; and a protective layer on a media facing side of the adhesion layer.

12 . The system as recited in claim 11 , wherein a ratio of Ni to Cr in the adhesion layer is in a range of 75:25 to 25:75 on an atomic percentage basis.

13 . The system as recited in claim 11 , wherein a deposition thickness of the adhesion layer is between 2 and 16 angstroms.

14 . The system as recited in claim 11 , wherein the near field transducer comprises gold.

15 . The system as recited in claim 11 , wherein the near field transducer has a notch.

16 . The system as recited in claim 11 , wherein at least one component of the adhesion layer is nitrided.

17 . The system as recited in claim 16 , wherein a ratio of nitrogen to Cr in the adhesion layer is in a range of greater than 0:1 to about 67:33 on an atomic percentage basis.

18 . The system as recited in claim 11 , wherein the protective layer comprises silicon nitride.

19 . The system as recited in claim 11 , comprising:
a magnetic medium; a drive mechanism for passing the magnetic medium over the near field transducer; and a controller electrically coupled to a magnetic head having the near field transducer.

20 . A method, comprising:
forming an adhesion layer on a media facing side of a near field transducer, the adhesion layer comprising Ni and Cr; and forming a protective layer on a media facing side of the adhesion layer.

Assignees

• HGST Netherlands BV

Inventors

• Bian Xiaoping
• Dai Qing
• Lam Alan C
• Stipe Barry C

Classifications

• G11B5/314 Primary

  where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers (G11B5/3196 takes precedence) · CPC title

• G11B2005/0021

  Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal · CPC title

• G11B5/40

  Protective measures on heads, e.g. against excessive temperature  (G11B5/31 takes precedence; protection against wear G11B5/255  {; protective structure of the head: see under structures, e.g. G11B5/3106}) · CPC title

• G11B5/255

  comprising means for protection against wear {(in thin film structures G11B5/3106)} · CPC title

• G11B11/10534

  for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording · CPC title