Hgst Netherlands, B.v.

Nthdegree Technologies Worldwide Inc.

Thomas William Clinton

Barry C Stipe

Juraj Topolancik

Erhard Theodor Schreck

William Johnstone Ray

Theodore I Kamins

Mark David Lowenthal

Takuya Matsumoto

Sue Siyang Zhang

Jui-lung Li

Neil O Shotton

Vera Nicholaevna Lockett

Hamid Balamane

Shen Ren

Vijay Prakash Singh Rawat

Kanaiyalal Patel

A method of forming a wave guide for a heat assisted magnetic recording slider of a disk drive includes depositing a layer of waveguide material onto a substrate, and depositing a layer of a hard mask material onto the waveguide material. The method then includes depositing a layer of photoresist onto the hard mask material, and exposing the photoresist to produce a hard mask pattern that includes a waveguide pattern. The method also includes stripping the photoresist material leaving the hard mask pattern having a first line edge roughness. The method also includes removing the waveguide material not covered by the hard mask, the waveguide having sidewalls which having a line edge roughness which is substantially equal to the first line edge roughness. Also disclosed is an apparatus for accomplishing the method.

Method and apparatus for magnetic recording head having a waveguide

The present invention generally relates to a HAMR head having not only a tapered core for the SSC, but additionally a secondary confinement material in the cladding surrounding the core taper. The secondary confinement material prevents diverging light from the laser diode from spreading so that the light is coupled into the core of the SSC. The secondary confinement material is a symmetric structure that surrounds the core of the SSC on all sides so that high conversion efficiency is achieved for short taper lengths.

HAMR head spot-size converters with secondary index confinement

Multilayer carbon nanotube capacitors, and methods and printable compositions for manufacturing multilayer carbon nanotubes (CNTs) are disclosed. A first capacitor embodiment comprises: a first conductor; a plurality of fixed CNTs in an ionic liquid, each fixed CNT comprising a magnetic catalyst nanoparticle coupled to a carbon nanotube and further coupled to the first conductor; and a first plurality of free CNTs dispersed and moveable in the ionic liquid. Another capacitor embodiment comprises: a first conductor; a conductive nanomesh coupled to the first conductor; a first plurality of fixed CNTs in an ionic liquid and further coupled to the conductive nanomesh; and a plurality of free CNTs dispersed and moveable in the ionic liquid. Various methods of printing the CNTs and other structures, and methods of aligning and moving the CNTs using applied electric and magnetic fields, are also disclosed.

Method of and printable compositions for manufacturing a multilayer carbon nanotube capacitor

The embodiments disclosed herein generally relate to a HAMR head in which the SSC is fabricated adjacent the NFT where the SSC is formed on a substrate that has been protected from NFT fabrication processing conditions. As such, the substrate remains smooth so that the SSC formed thereover, is not negatively impacted by the NFT process conditions.

Sacrificial protection layer for preventing ion mill damage to HAMR optical components

Techniques for improving the recording quality during heat assisted magnetic recording (HAMR) by monitoring the power of a source used to heat a storage medium are described. In one example, a source emits electromagnetic radiation. A waveguide transmits the electromagnetic radiation onto a surface of a magnetic media. A photoresistive material is proximately located to the waveguide. The resistance of the photoresistive material varies based on the intensity of electromagnetic radiation propagating through the waveguide. The power of the source is determined by measuring the resistance of the photoresitive material. The power of the source is adjusted based on the determined power.

Slider embedded photodetector for optical power monitoring in heat assisted magnetic recording

Growing community of inventors

Danville, CA, United States of America

Thomas William Clinton