Materials for near field transducers, near field tranducers containing same, and methods of forming

Patent metadata

Field	Value
Publication number	US-10964347-B2
Application number	US-201615357333-A
Country	US
Kind code	B2
Filing date	Nov 21, 2016
Priority date	Jun 24, 2013
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

A device including a near field transducer, the near field transducer including gold (Au), silver (Ag), copper (Cu), or aluminum (Al), and at least two other secondary atoms, the at least two other secondary atoms selected from: boron (B), bismuth (Bi), indium (In), sulfur (S), silicon (Si), tin (Sn), manganese (Mn), tellurium (Te), holmium (Ho), lutetium (Lu), praseodymium (Pr), scandium (Sc), uranium (U), barium (Ba), chlorine (Cl), cesium (Cs), dysprosium (Dy), europium (Eu), fluorine (F), germanium (Ge), hydrogen (H), iodine (I), rubidium (Rb), selenium (Se), terbium (Tb), nitrogen (N), oxygen (O), carbon (C), antimony (Sb), gadolinium (Gd), samarium (Sm), thallium (Tl), cadmium (Cd), neodymium (Nd), phosphorus (P), lead (Pb), hafnium (Hf), niobium (Nb), erbium (Er), zinc (Zn), magnesium (Mg), palladium (Pd), vanadium (V), zinc (Zn), chromium (Cr), iron (Fe), lithium (Li), nickel (Ni), platinum (Pt), sodium (Na), strontium (Sr), calcium (Ca), yttrium (Y), thorium (Th), beryllium (Be), thulium (Tm), erbium (Er), ytterbium (Yb), promethium (Pm), neodymium (Nd cobalt (Co), cerium (Ce), lanthanum (La), praseodymium (Pr), or combinations thereof.

First claim

What is claimed is:

1. A device comprising:
a near field transducer, the near field transducer capable of coupling incident light to surface plasmons, the near field transducer comprising gold (Au) and at least two other secondary atoms, the at least two other secondary atoms selected from:
indium (In), tin (Sn), holmium (Ho), lutetium (Lu), praseodymium (Pr), scandium (Sc), barium (Ba), cesium (Cs), dysprosium (Dy), europium (Eu), rubidium (Rb), terbium (Tb), gadolinium (Gd), samarium (Sm), thallium (Tl), cadmium (Cd), lead (Pb), hafnium (Hf), erbium (Er), lithium (Li), sodium (Na), strontium (Sr), calcium (Ca), yttrium (Y), thorium (Th), thulium (Tm), ytterbium (Yb), cerium (Ce), lanthanum (La), potassium (K), mercury (Hg), or combinations thereof.

2. The device according to claim 1 , wherein the NFT comprises about 0.1 atomic percent to about 50 atomic percent in total of the at least two secondary atoms.

3. The device according to claim 1 , wherein the NFT comprises about 0.1 atomic percent to about 5 atomic percent in total of the at least two secondary atoms.

4. The apparatus according to claim 1 further comprising an energy source.

5. The device according to claim 1 further comprising a light source and a waveguide.

6. The device according to claim 1 further comprising at least one actuator arm having a first and a second end; at least one head, wherein each arm has a head at the first end thereof and wherein each head comprises a light source and the NFT.

7. The device according to claim 6 further comprising a magnetic reader; and
a magnetic writer, and wherein the light source and the near field transducer are configured to transmit light from the light source to the near field transducer in order to assist the magnetic writer with writing.

Assignees

• Seagate Technology Llc

Inventors

• Cheng Yuhang
• Zhao Tong
• Kautzky Michael C
• Rejda Ed F
• Wierman Kurt W
• Franzen Scott
• Jayashankar Sethuraman
• Sahoo Sarbeswar
• Brons Justin Glen
• Riemer Steve C
• Gong Jie
• Seigler Michael Allen

Classifications

• B32B15/018

  one layer being formed of a noble metal or a noble metal alloy · CPC title

• B32B15/01 Primary

  all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)} · CPC title

• G11B5/3163

  Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers · CPC title

• C22C20/00

  Alloys based on cadmium · CPC title

• C22C9/06

  with nickel or cobalt as the next major constituent · CPC title