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Headway Technologies Inc patents


Recent patent applications related to Headway Technologies Inc. Headway Technologies Inc is listed as an Agent/Assignee. Note: Headway Technologies Inc may have other listings under different names/spellings. We're not affiliated with Headway Technologies Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "H" | Headway Technologies Inc-related inventors


Plasmon generator with metallic waveguide blocker for tamr and a method of its fabrication

A tamr (thermal assisted magnetic recording) write head and a method of its fabrication. The write head has a metal blocker formed against a distal end of a waveguide. ... Headway Technologies Inc

Magnetic tunnel junction with low defect rate after high temperature anneal for magnetic device applications

A magnetic tunnel junction is disclosed wherein the reference layer and free layer each comprise one layer having a boron content from 25 to 50 atomic %, and an adjoining second layer with a boron content from 1 to 20 atomic %. One of the first and second layers in each of the free layer and reference layer contacts the tunnel barrier. ... Headway Technologies Inc

Write head designs with sandwich trailing shield (sts) for high data rate perpendicular recording

A pmr writer is disclosed with an all wrap around (awa) shield design in which one or more of the leading shield, side shields, and trailing shield (ts) structure (except the hot seed layer) at the air bearing surface (abs) are comprised of an alloy having a damping parameter α of ≥0.04 to minimize wide area track erasure (wate). The ts structure comprises two outer 8-16 kg portions on each side of a center stack with a lower write gap, a middle 19-24 kg (hot seed) layer, and an upper 16-24 kg ts layer each having a first cross-track width. ... Headway Technologies Inc

Hard magnet stabilized shield for double (2dmr) or triple (3dmr) dimension magnetic reader structures

A hard magnet stabilization scheme is disclosed for a top shield and junction shields for double or triple dimension magnetic reader structures. In one design, the hard magnet (hm) adjoins a top or bottom surface of all or part of a shield domain such that the hm is recessed from the air bearing surface to satisfy reader-to-reader spacing requirements and stabilizes a closed loop magnetization in the top shield. ... Headway Technologies Inc

Magnetic reader sensor with shield spacing improvement and better pin flip robustness

A process flow is disclosed for forming a mr sensor having an antiferromagnetic (afm) layer recessed behind a bottom shield to reduce reader shield spacing and improve pin related noise. An ap2/afm coupling layer/ap1 stack that extends from an air bearing surface to the mr sensor backside is formed above the afm layer. ... Headway Technologies Inc

Thermally-assisted magnetic recording head having symmetric optical side shields

An optically shielded tamr (thermally assisted magnetic recording) write head has a metal waveguide blocker formed against a distal end of a waveguide and a pair of symmetrically disposed optical side shields formed to either side of a plasmon generator formed above the waveguide. The waveguide focuses optical radiation on the adjacent plasmon generator where it excites plasmon modes that heat the recording medium with near-field energy and the waveguide blocker prevents excess optical radiation from blurring the spot on the recording region. ... Headway Technologies Inc

Fully compensated synthetic ferromagnet for spintronics applications

A laminated seed layer stack with a smooth top surface having a peak to peak roughness of 0.5 nm is formed by sequentially sputter depositing a first seed layer, a first amorphous layer, a second seed layer, and a second amorphous layer where each seed layer may be mg and has a resputtering rate 2 to 30× that of the amorphous layers that are tan, sin, or a cofem alloy. A template layer that is nicr or nifecr is formed on the second amorphous layer. ... Headway Technologies Inc

Perpendicularly magnetized ferromagnetic layers having an oxide interface allowing for improved control of oxidation

An improved magnetic tunnel junction with two oxide interfaces on each side of a ferromagnetic layer (fml) leads to higher pma in the fml. The novel stack structure allows improved control during oxidation of the top oxide layer. ... Headway Technologies Inc

New surface treatment method for dielectric anti-reflective coating (darc) to shrink photoresist critical dimension (cd)

A krf (248 nm) photoresist patterning process flow is disclosed wherein photoresist patterns having a sub-100 nm cd are formed on a dielectric antireflective coating (darc) thereby lowering cost of ownership by replacing a more expensive arf (193 nm) photoresist patterning process. A key feature is treatment of a darc such as sion with a photoresist developer solution that is 0.263 n tetramethylammonium hydroxide (tmah) prior to treatment with hexamethyldisilazane (hmds) in order to significantly improve adhesion of features with cd down to about 60 nm. ... Headway Technologies Inc

Areal density improvement of perpendicular magnetic recording (pmr) write head by tuning magnetic flux loops

A pmr writer is disclosed wherein magnetic flux return from a magnetic medium to a main pole is substantially greater through a trailing shield structure than through a leading return loop comprised of a leading shield, return path layer (rtp), and back gap connection (bgc). Magnetic impedance is increased between the rtp and main pole in the leading return loop by removing one or more layers in the bgc and replacing with dielectric material and non-magnetic metal to form a dielectric gap between the rtp and main pole. ... Headway Technologies Inc

Air-bearing design for hydrocarbon and lube pick-up improvements in hard disk drive (hdd)

A slider design for a hard disk drive (hdd) features an air-bearing surface (abs) topography with arrays of micro-dots formed on bases of a multiplicity of cavities at different depths. The design eliminates the accumulation of hydrocarbons (e.g., spindle oil and disk lubricant) deposits in regions of air stagnation within the cavities where backflows and foreflows of air meet and cancel during hdd operation. ... Headway Technologies Inc

Magnetic head for perpendicular magnetic recording with a coil including a first winding portion of one turn and a second winding portion of less than one turn

A magnetic head includes a coil, a main pole and a return path section. The return path section is located on the trailing side relative to the main pole so that a space is defined between the main pole and itself. ... Headway Technologies Inc

Multilayer structure for reducing film roughness in magnetic devices

A seed layer stack with a uniform top surface having a peak to peak roughness of 0.5 nm is formed by sputter depositing an amorphous layer on a smoothing layer such as mg where the latter has a resputtering rate 2 to 30× that of the amorphous layer. The uppermost seed (template) layer is niw, nimo, or one or more of nicr, nifecr, and hf while the bottommost seed layer is one or more of ta, tan, zr, zrn, nb, nbn, mo, mon, tin, w, wn, and ru. ... Headway Technologies Inc

Thermally-assisted magnetic recording head including a main pole and a plasmon generator

A thermally-assisted magnetic recording head includes a main pole and a plasmon generator. The plasmon generator includes a first material portion and a second material portion formed of different materials. ... Headway Technologies Inc

08/03/17 / #20170221505

Self-aligned hybrid au-rh near field transducer for enhanced reliability

A near field transducer (nft) is formed between a waveguide and main pole layer at an air bearing surface (abs). The nft includes a resonator body layer made of au, for example, with a front side at a first plane that is recessed a first distance from the abs and a back side that is at a second plane formed parallel to the abs and first plane. ... Headway Technologies Inc

05/18/17 / #20170140780

Magnetic head for perpendicular magentic recording capable of preventing unwanted erasure

A magnetic head includes a coil, a main pole, a write shield, and a return path section. The coil includes a coil element located on the trailing side of the main pole. ... Headway Technologies Inc

05/11/17 / #20170133044

Perpendicular magnetic recording (pmr) writer with improved trailing shield design

A pmr (perpendicular magnetic recording) head includes a tapered write pole that is fully surrounded by wrapped-around magnetic shields, including laterally disposed side shields, a trailing shield and a leading shield. A layer of high magnetic saturation material (high bs) is formed on the leading edge of the trailing shield and extends rearward, away from the abs plane to define a cross-sectional write gap shape that is not conformal with the shape of the tapered write pole. ... Headway Technologies Inc

05/04/17 / #20170125042

Magnetic head for perpendicular magnetic recording with a coil including a first winding portion of one turn and a second winding portion of less than one turn

A magnetic head includes a coil, a main pole and a return path section. The return path section is located on the trailing side relative to the main pole so that a space is defined between the main pole and itself. ... Headway Technologies Inc

04/27/17 / #20170117456

Seed layer for multilayer magnetic materials

A magnetic element is disclosed wherein a composite seed layer such as tan/mg enhances perpendicular magnetic anisotropy (pma) in an overlying magnetic layer that may be a reference layer, free layer, or dipole layer. The first seed layer is selected from one or more of ta, zr, nb, tan, zrn, nbn, and ru. ... Headway Technologies Inc

03/23/17 / #20170084296

Bias layer and shield biasing design

A read head is longitudinally biased unidirectionally by laterally abutting soft magnetic layers or multilayers. The soft magnetic layers are themselves magnetically stabilized by layers of antiferromagnetic material that are exchange coupled to them. ... Headway Technologies Inc

03/16/17 / #20170077391

Side shielded magnetoresistive (mr) read head with perpendicular magnetic free layer

A mr sensor is disclosed that has a free layer (fl) with perpendicular magnetic anisotropy (pma), which eliminates the need for an adjacent hard bias structure to stabilize free layer magnetization, and minimizes shield-fl interactions. In a tmr embodiment, a seed layer, free layer, junction layer, reference layer, and pinning layer are sequentially formed on a bottom shield. ... Headway Technologies Inc

03/16/17 / #20170076742

Perpendicular magnetic recording (pmr) writer with hybrid shield layers

A perpendicular magnetic recording writer with an all wrap around (awa) shield design wherein one or more of the leading shield, trailing shield, and side shields comprises a magnetic “hot seed” layer made of a >19 kg to 24 kg material that adjoins a gap layer, and a side of the hot seed layer opposite the gap layer adjoins a high damping magnetic layer made of a 10-16 kg material (or a 16-19 kg material in the trailing shield) having a gilbert damping parameter α>0.04. In one embodiment, the high damping magnetic layer is fenire with a re content of 3 to 15 atomic %. ... Headway Technologies Inc

03/16/17 / #20170076741

Perpendicular magnetic recording (pmr) writer with hybrid shield layers

A method is disclosed for forming a perpendicular magnetic recording writer with an all wrap around (awa) shield design wherein one or more of the leading shield, trailing shield, and side shields are a composite wherein a magnetic “hot seed” layer made of a >19 kg to 24 kg material adjoins a gap layer, and a side of the hot seed layer opposite the gap layer adjoins a high damping magnetic layer made of a 10-16 kg material (or a 16-19 kg material in the trailing shield) having a gilbert damping parameter α>0.04. In one embodiment, the high damping magnetic layer is fenire with a re content of 3 to 15 atomic %. ... Headway Technologies Inc

03/09/17 / #20170069834

Method to minimize mtj sidewall damage and bottom electrode redeposition using ibe trimming

An improved method for etching a magnetic tunneling junction (mtj) structure is achieved. A stack of mtj layers is provided on a bottom electrode. ... Headway Technologies Inc

03/09/17 / #20170069341

Bias layer and shield biasing design

A read head is longitudinally biased unidirectionally by laterally abutting soft magnetic layers or multilayers. The soft magnetic layers are themselves magnetically stabilized by layers of antiferromagnetic material that are exchange coupled to them. ... Headway Technologies Inc

02/16/17 / #20170047087

Thermally-assisted magnetic recording head including a main pole and a plasmon generator

A main pole has a front end face including a first end face portion and a second end face portion. A plasmon generator has a near-field light generating surface. ... Headway Technologies Inc

02/09/17 / #20170040031

Perpendicular magnetic recording (pmr) write head with improved shapes of side shield and main pole

A perpendicular magnetic recording writer is disclosed with a side shield separated from a write pole side by a gap layer at an air bearing surface (abs) where the side shield has a first sidewall facing the write pole with an end at height (h1) from the abs, and a second sidewall at height h1 that is parallel to the abs. The write pole side is curved such that a first portion proximate to the abs is at an angle of 0 to 40 degrees with respect to a center plane formed orthogonal to the abs, and a second section proximate to a corner where the curved side connects with a flared main pole side is formed substantially parallel to the second sidewall. ... Headway Technologies Inc

02/02/17 / #20170033282

Physical cleaning with in-situ dielectric encapsulation layer for spintronic device application

A method for etching a magnetic tunneling junction (mtj) structure is described. A stack of mtj layers is provided on a bottom electrode in a substrate. ... Headway Technologies Inc

01/26/17 / #20170025602

Magnetic tunnel junction with low defect rate after high temperature anneal for magnetic device applications

A magnetic tunnel junction is disclosed wherein the reference layer and free layer each comprise one layer having a boron content from 25 to 50 atomic %, and an adjoining second layer with a boron content from 1 to 20 atomic %. One of the first and second layers in each of the free layer and reference layer contacts the tunnel barrier. ... Headway Technologies Inc

01/26/17 / #20170025135

Supermalloy and mu metal side and top shields for magnetic read heads

The use of supermalloy-like materials such as nifeme where me is one or more of mo, cr, and cu for the side and top shields of a magnetic bit sensor is shown to provide better shielding protection from stray fields because of their extremely high permeability. Moreover, the side shield may comprise a stack in which a ni, fe, co, feni, cofe, or feco is sandwiched between two nifeme layers to enhance the bias field on an adjacent free layer. ... Headway Technologies Inc

01/12/17 / #20170011756

Resist reactive ion etch (rie) process for plating

A magnetic write head has a plated coil with narrow pitch and is suitable for writing at high frequencies on magnetic media with high coercivity. The narrow pitch is obtained without such disadvantages as overplating that has adversely affected prior art attempts to produce such narrow pitches. ... Headway Technologies Inc








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