Abstract: Embodiments disclosed herein generally relate to a HAMR head. The HAMR head includes a main pole, a waveguide and a NFT disposed between the main pole and the waveguide. The NFT includes an antenna, and the antenna includes a first portion and a second portion. The second portion may be made of a material having a higher melting point than the material of the first portion. Having the second portion helps reduce the temperature rise of the NFT and reduce the laser power applied to the NFT.

Abstract: Systems and methods for producing syngas and ammonia are provided. The method can include reforming a hydrocarbon in a first reaction zone in the presence of one or more first catalysts and steam at conditions sufficient to produce an effluent comprising a portion of the hydrocarbon, carbon monoxide, carbon dioxide, and hydrogen. The effluent can be reformed in a second reaction zone in the presence of one or more second catalysts and nitrogen at conditions sufficient to produce a syngas comprising methane, hydrogen, nitrogen, carbon monoxide, and carbon dioxide, or any combination thereof. At least a portion of the nitrogen and hydrogen in the syngas can be converted to ammonia to produce an ammonia effluent. The ammonia effluent can be separated to produce an ammonia product and a purge gas comprising nitrogen. At least a portion of the purge gas can be recycled to the hydrocarbon, the effluent, or a combination thereof.

Abstract: 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.

Abstract: A control module for an optical switch node, comprising a TIM having a plurality of operating modes in which a first mode is identified by a first byte sequence; a communication interface unit transmitting a second byte sequence for placing the TIM in the first mode, the first byte sequence different from the second byte sequence, and a gate array receiving the second byte sequence, storing a list of predetermined unique values, each value indicative of a particular operating mode command, receiving at least a portion of the second byte sequence and receiving instructions to apply an algorithm to at least a portion of the second byte sequence to transform the portion into a checksum value, comparing the checksum value to the list to determine the operating mode command, and transmitting the first byte sequence to the TIM to place the TIM into the first mode.

Abstract: The embodiments of the present invention generally relate to a magnetic head having a magnetic lip. The vertical sides and the bottom of the magnetic lip are covered by one or more conductive layers. In one embodiment, the bottom of the magnetic lip is covered by a first conductive layer and the vertical sides of the magnetic lip are covered by a second conductive layer. The conductive layers are made of a material that would not react with oxygen, thus no oxide films are formed on the vertical sides and the bottom of the magnetic lip during the manufacturing of the magnetic head.

Abstract: Embodiments disclosed herein generally relate to a HAMR head. The HAMR head includes a main pole, a waveguide and a NFT disposed between the main pole and the waveguide. The NFT includes an antenna, and the antenna is made of a compound that has a composition that varies based on the location within the antenna. In one embodiment, the antenna has a surface at a media facing surface (MFS) and the surface has an apex, and the composition of the compound varies from the apex in a direction away from the apex. The apex has the highest temperature during the operation of the HAMR head, and having a composition that is thermally stable at the apex helps achieve higher reliability.

Abstract: A control module for an optical switch node, comprising a TIM having a plurality of operating modes in which a first mode is identified by a first byte sequence; a communication interface unit transmitting a second byte sequence for placing the TIM in the first mode, the first byte sequence different from the second byte sequence, and a gate array receiving the second byte sequence, storing a list of predetermined unique values, each value indicative of a particular operating mode command, receiving at least a portion of the second byte sequence and receiving instructions to apply an algorithm to at least a portion of the second byte sequence to transform the portion into a checksum value, comparing the checksum value to the list to determine the operating mode command, and transmitting the first byte sequence to the TIM to place the TIM into the first mode.

Abstract: Apparatus, systems, and processes for reforming hydrocarbons are provided. The process can include reforming a first hydrocarbon in the presence of steam and one or more first catalysts in a first reformer to produce a first reformed hydrocarbon. The process can also include reforming the first reformed hydrocarbon in the presence of one or more second catalysts in a second reformer to produce a second reformed hydrocarbon. The process can also include reforming a second hydrocarbon in the presence of steam and one or more third catalysts in a third reformer to produce a third reformed hydrocarbon, where heat from the second reformed hydrocarbon is transferred to the second hydrocarbon to support reforming of the second hydrocarbon.

Abstract: Embodiments of the present invention generally relate to a HAMR head including a near field transducer having an antenna, a surface diffusion inhibitor layer disposed on a portion of the antenna and an aperture disposed over the surface diffusion inhibitor layer. The surface diffusion inhibitor layer has a greater melting point than the antenna, and the surface diffusion inhibitor layer material is immiscible in the antenna material.

Abstract: The present invention generally relates to a HAMR head. An insulating layer isolates the NFT from the magnetic lip of the magnetic pole. A noble metal alloy diffusion barrier layer is present between the insulating layer and the magnetic lip to prevent diffusion from the insulating layer into the magnetic lip. The noble metal alloy has a melting point of greater than about 1065 degrees Celsius, and the noble metals may be selected from Au, Pt, Ir, Re and Ru. The alloying elements comprise less than 10 percent of the alloy. The alloying elements can include Rh, W, Mo, Ni, Pt, Co, B, Ru and combinations thereof. The diffusion barrier layer may surround the magnetic lip, may surround the insulating layer, or may simply be at the interface of the insulating layer and the magnetic lip.

Abstract: Embodiments of the present invention generally relate to a HAMR head including a near field transducer having an antenna, a surface diffusion inhibitor layer disposed on a portion of the antenna and an aperture disposed over the surface diffusion inhibitor layer. The surface diffusion inhibitor layer has a greater melting point than the antenna, and the surface diffusion inhibitor layer material is immiscible in the antenna material.

Abstract: The present invention generally relates to a HAMR head. An insulating layer isolates the NFT from the magnetic lip of the magnetic pole. A noble metal alloy diffusion barrier layer is present between the insulating layer and the magnetic lip to prevent diffusion from the insulating layer into the magnetic lip. The noble metal alloy has a melting point of greater than about 1065 degrees Celsius, and the noble metals may be selected from Au, Pt, Ir, Re and Ru. The alloying elements comprise less than 10 percent of the alloy. The alloying elements can include Rh, W, Mo, Ni, Pt, Co, B, Ru and combinations thereof. The diffusion barrier layer may surround the magnetic lip, may surround the insulating layer, or may simply be at the interface of the insulating layer and the magnetic lip.

Abstract: The embodiments of the present invention generally relate to a magnetic head having a magnetic lip. The vertical sides and the bottom of the magnetic lip are covered by one or more conductive layers. In one embodiment, the bottom of the magnetic lip is covered by a first conductive layer and the vertical sides of the magnetic lip are covered by a second conductive layer. The conductive layers are made of a material that would not react with oxygen, thus no oxide films are formed on the vertical sides and the bottom of the magnetic lip during the manufacturing of the magnetic head.

Abstract: A heat-assisted magnetic recording (HAMR) head in which the core of the optical waveguide has an end face that abuts the NFT and the write pole lip has a diffusion barrier between the end face of the waveguide core and the write pole lip. The diffusion barrier layer may also be located between the waveguide core end face and the NFT, in which case it is formed of an optically transparent material, like TaNx, TiNx, ZrNx, HfNx, NbNx, CrNx, VNx, TiC, TaC, WC, SiC or SiNx, or a layer of Au, Ru, Rh or Ir with a thickness less than 5 nm. In addition to being located between both the NFT and the write pole lip and the waveguide core end face, the diffusion barrier layer may also be located between the waveguide core and the lower waveguide cladding layer.

Abstract: 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.

Abstract: Embodiments of the present invention generally relate to a HAMR head including a near field transducer having an antenna, a surface diffusion inhibitor layer disposed on a portion of the antenna and an aperture disposed over the surface diffusion inhibitor layer. The surface diffusion inhibitor layer has a greater melting point than the antenna, and the surface diffusion inhibitor layer material is immiscible in the antenna material.

Abstract: The embodiments of the present invention generally relate to a magnetic head having a magnetic lip. The vertical sides and the bottom of the magnetic lip are covered by one or more conductive layers. In one embodiment, the bottom of the magnetic lip is covered by a first conductive layer and the vertical sides of the magnetic lip are covered by a second conductive layer. The conductive layers are made of a material that would not react with oxygen, thus no oxide films are formed on the vertical sides and the bottom of the magnetic lip during the manufacturing of the magnetic head.

Abstract: Methods and systems for making ammonia are provided. The method can include converting carbon monoxide in a first syngas to carbon dioxide to produce a shifted syngas. At least a portion of the carbon dioxide can be separated from the shifted syngas to produce a carbon dioxide-lean syngas. Carbon monoxide and/or carbon dioxide in the carbon dioxide-lean syngas can be converted to methane to produce a methanated first syngas. A second syngas can be separated to produce a purified second syngas and a waste gas. The methanated first syngas and the purified second syngas can be combined to produce an ammonia feedstock. The ammonia feedstock can have a hydrogen to nitrogen molar ratio of about 3.5:1 to about 2.5:1. At least a portion of the hydrogen and nitrogen in the ammonia feedstock can be reacted to produce an ammonia product.

Abstract: Methods and systems for making ammonia are provided. The method can include heating a first compressed syngas to produce a heated first syngas. The heated first syngas and a second compressed syngas can be combined to produce a combined syngas. The combined syngas can be reacted within a first ammonia converter and a second ammonia converter to produce an ammonia product. Heat from the ammonia product can be transferred to a first heat transfer medium to produce a first cooled product and a second heat transfer medium. Heat from the first cooled product can be transferred to a third heat transfer medium to produce a second cooled product. Heat from the second cooled product can be transferred to the combined syngas to produce a third cooled product. The third cooled product can be separated to produce a purified ammonia product and a recycle gas.

Abstract: The embodiments of the present invention generally relate to a magnetic head having a magnetic lip. The vertical sides and the bottom of the magnetic lip are covered by one or more conductive layers. In one embodiment, the bottom of the magnetic lip is covered by a first conductive layer and the vertical sides of the magnetic hp are covered by a second conductive layer. The conductive layers are made of a material that would not react with oxygen, thus no oxide films are formed on the vertical sides and the bottom of the magnetic lip during the manufacturing of the magnetic head.