摘要:
Systems and methods for multiple-time programmable (MTP) devices. An MTP device includes a magnetic tunnel junction (MTJ) device programmable to a plurality of states based on voltage applied across the MTJ device. The plurality of states include a first resistance state corresponding to a first binary value stored in the MTJ device based on a first voltage, a second resistance state corresponding to a second binary value stored in the MTJ device based on a second voltage, a third resistance state corresponding to a breakdown of a barrier layer of the MTJ device based on a third voltage, and a fourth resistance state corresponding to an open fuse based on a fourth voltage.
摘要:
A magnetic tunnel junction (MTJ) storage element may comprise a pinned layer stack and a first functional layer. The pinned layer stack is formed of a plurality of layers comprising a bottom pinned layer, a coupling layer, and a top pinned layer. The first functional layer is disposed in the bottom pinned layer or the top pinned layer.
摘要:
Partial perpendicular magnetic anisotropy (PPMA) type magnetic random access memory cells are constructed using processes and structural configurations that induce a directed static strain/stress on an MTJ to increase the perpendicular magnetic anisotropy. Consequently, reduced switching current of the MTJ results. The directed static strain/stress on the MTJ is induced in a controlled direction and/or with a controlled magnitude during fabrication. The MTJ is permanently subject to a predetermined directed stress and permanently includes the directed static strain/strain that provides reduced switching current.
摘要:
Partial perpendicular magnetic anisotropy (PPMA) type magnetic random access memory cells are constructed using processes and structural configurations that induce a directed static strain/stress on an MTJ to increase the perpendicular magnetic anisotropy. Consequently, reduced switching current of the MTJ results. The directed static strain/stress on the MTJ is induced in a controlled direction and/or with a controlled magnitude during fabrication. The MTJ is permanently subject to a predetermined directed stress and permanently includes the directed static strain/strain that provides reduced switching current.
摘要:
A magnetic tunnel junction (MTJ) storage element may comprise a pinned layer stack and a first functional layer. The pinned layer stack is formed of a plurality of layers comprising a bottom pinned layer, a coupling layer, and a top pinned layer. The first functional layer is disposed in the bottom pinned layer or the top pinned layer.
摘要:
A magnetic tunnel junction (MTJ) with direct contact is manufactured having lower resistances, improved yield, and simpler fabrication. The lower resistances improve both read and write processes in the MTJ. The MTJ layers are deposited on a bottom electrode aligned with the bottom metal. An etch stop layer may be deposited adjacent to the bottom metal to prevent overetch of an insulator surrounding the bottom metal. The bottom electrode is planarized before deposition of the MTJ layers to provide a substantially flat surface. Additionally, an underlayer may be deposited on the bottom electrode before the MTJ layers to promote desired characteristics of the MTJ.
摘要:
A magnetic tunnel junction (MTJ) with direct contact is manufactured having lower resistances, improved yield, and simpler fabrication. The lower resistances improve both read and write processes in the MTJ. The MTJ layers are deposited on a bottom electrode aligned with the bottom metal. An etch stop layer may be deposited adjacent to the bottom metal to prevent overetch of an insulator surrounding the bottom metal. The bottom electrode is planarized before deposition of the MTJ layers to provide a substantially flat surface. Additionally, an underlayer may be deposited on the bottom electrode before the MTJ layers to promote desired characteristics of the MTJ.
摘要:
Systems and methods for multiple-time programmable (MTP) devices. An MTP device includes a magnetic tunnel junction (MTJ) device programmable to a plurality of states based on voltage applied across the MTJ device. The plurality of states include a first resistance state corresponding to a first binary value stored in the MTJ device based on a first voltage, a second resistance state corresponding to a second binary value stored in the MTJ device based on a second voltage, a third resistance state corresponding to a breakdown of a barrier layer of the MTJ device based on a third voltage, and a fourth resistance state corresponding to an open fuse based on a fourth voltage.
摘要:
Perpendicular magnetic anisotropy (PMA) type magnetic random access memory cells are constructed with a composite PMA layer to provide a magnetic tunnel junction (MTJ) with an acceptable thermal barrier. A PMA coupling layer is deposited between a first PMA layer and a second PMA layer to form the composite PMA layer. The composite PMA layer may be incorporated in PMA type MRAM cells or in-plane type MRAM cells.
摘要:
Perpendicular magnetic anisotropy (PMA) type magnetic random access memory cells are constructed with a composite PMA layer to provide a magnetic tunnel junction (MTJ) with an acceptable thermal barrier, A PMA coupling layer is deposited between a first PMA layer and a second PMA layer to form the composite PMA layer. The composite PMA layer may be incorporated in PMA type MRAM cells or in-plane type MRAM cells.