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1. WO2022010577 - DESIGN AND METHOD TO REDUCE BASELINE SHIFT FOR A SOT DIFFERENTIAL READER

Publication Number WO/2022/010577
Publication Date 13.01.2022
International Application No. PCT/US2021/033209
International Filing Date 19.05.2021
IPC
H01L 43/14 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
43Devices using galvano-magnetic or similar magnetic effects; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof
12Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
14for Hall-effect devices
H01L 27/22 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
27Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
22including components using galvano-magnetic effects, e.g. Hall effect; using similar magnetic field effects
G11C 11/16 2006.1
GPHYSICS
11INFORMATION STORAGE
CSTATIC STORES
11Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
02using magnetic elements
16using elements in which the storage effect is based on magnetic spin effect
G11C 11/18 2006.1
GPHYSICS
11INFORMATION STORAGE
CSTATIC STORES
11Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
18using Hall-effect devices
CPC
G11B 5/112
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
10Structure or manufacture of housings or shields for heads
11Shielding of head against electric or magnetic fields
112Manufacture of shielding device
G11B 5/232
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
187Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
23Gap features
232Manufacture of gap
G11B 5/372
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
33Structure or manufacture of flux-sensitive heads, ; i.e. for reproduction only; Combination of such heads with means for recording or erasing only
37using galvano-magnetic devices, e.g. Hall-effect devices
372in magnetic thin films
Applicants
  • WESTERN DIGITAL TECHNOLOGIES, INC. [US]/[US]
Inventors
  • LE, Quang
  • LIU, Xiaoyong
  • BAI, Zhigang
  • LI, Zhanjie
  • HO, Kuok San
  • TAKANO, Hisashi
Agents
  • VERSTEEG, Steven H.
  • DETJEN, Puja S.
Priority Data
17/029,82623.09.2020US
63/050,01609.07.2020US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) DESIGN AND METHOD TO REDUCE BASELINE SHIFT FOR A SOT DIFFERENTIAL READER
(FR) CONCEPTION ET PROCÉDÉ POUR RÉDUIRE LE DÉCALAGE DE LIGNE DE BASE POUR UN LECTEUR DIFFÉRENTIEL SOT
Abstract
(EN) The present disclosure generally relates to spin-orbital torque (SOT) differential reader designs. The SOT differential reader is a multi-terminal device that comprises a first shield, a first spin hall layer, a first free layer, a gap layer, a second spin hall layer, a second free layer, and a second shield. The gap layer functions as an electrode and is disposed between the first spin hall layer and the second spin hall layer. Electrical lead connections are located about the first spin hall layer, the second spin hall layer, the gap layer, the first shield, and/or the second shield. The electrical lead connections facilitate the flow of current and/or voltage from a negative lead to a positive lead. The positioning of the electrical lead connections and the positioning of the SOT differential layers improves reader resolution without decreasing the shield-to-shield spacing (i.e., read-gap).
(FR) La présente invention concerne d'une manière générale des conceptions de lecteur différentiel à couple spin-orbite (SOT). Le lecteur différentiel SOT est un dispositif multi-terminal qui comprend un premier blindage, une première couche de Hall de spin, une première couche libre, une couche d'espacement, une seconde couche de Hall de spin, une seconde couche libre et un second blindage. La couche d'espacement fonctionne comme une électrode et est disposée entre la première couche de Hall de spin et la seconde couche de Hall de spin. Des connexions de conducteur électrique sont situées autour de la première couche de Hall de spin, de la seconde couche de Hall de spin, de la couche d'espacement, du premier blindage et/ou du second blindage. Les connexions de conducteur électrique facilitent le flux de courant et/ou de tension d'un conducteur négatif à un conducteur positif. Le positionnement des connexions de conducteur électrique et le positionnement des couches différentielles SOT améliorent la résolution du lecteur sans diminuer l'espacement de blindage à blindage (c'est-à-dire, l'intervalle de lecture).
Related patent documents
EP2021837735This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.
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