Abstract:
A spin orbit torque (SOT) memory device includes a spin orbit torque electrode disposed in a dielectric layer above a substrate and a magnetic tunnel junction (MTJ) device disposed on a portion of the spin orbit torque electrode. The spin orbit torque electrode has an uppermost is 10-20 times larger than the MTJ device. The MTJ device includes a free layer disposed on the spin orbit torque electrode, a tunnel barrier such as an MgO disposed on the free layer and a fixed layer disposed on the tunnel barrier.
Abstract:
Many silicon wafers include a mixture of structures including a first number of first structures, such as memory elements, having a first height and high component density and a second number of second structures, such as logic elements, having a second height that is greater than the first height and low component density. An etch process may be used to achieve the high component density using a multi-layer hardmask in which a first hardmask is formed on a surface of the semiconductor wafer. After forming the first hardmask, an etch process may be used to provide or otherwise facilitate the fabrication of a first number of first structures having a relatively high component density. A second hardmask may be selectively fabricated on at least a portion of the first hardmask. The combined thickness of first hardmask and the second hardmask may approximately equal the height of the second structures.
Abstract:
Switching current in Spin- Transfer Torque Memory (STTM) can be decreased. A magnetic memory cell is driven with a first pulse on a write line of the memory cell to heat the cell. The cell is then driven with a second pulse on the write line to set the state of the cell.
Abstract:
Methods of forming a microelectronic structure are described. Those methods may include forming a gate dielectric layer on a substrate, forming a metal gate layer on the gate dielectric layer, and then forming a polysilicon layer on the metal gate layer in situ, wherein the metal gate layer is not exposed to air.
Abstract:
A spin orbit torque (SOT) memory device includes a spin orbit torque electrode disposed in a dielectric layer above a substrate and a magnetic tunnel junction (MTJ) device disposed on a portion of the spin orbit torque electrode. The spin orbit torque electrode has a uppermost surface area that is 10-20 times larger than a lowermost surface area of the MTJ memory device. The MTJ memory device includes a storage layer disposed on the spin orbit torque electrode, a tunnel barrier such as an MgO disposed on the storage layer and a fixed magnetic layer disposed on the tunnel barrier.
Abstract:
A memory device includes a bottom electrode disposed above a substrate, a fixed magnet disposed above the bottom electrode, a tunnel barrier including a magnesium oxide disposed on the fixed magnet, a free magnet on the tunnel barrier, a cap oxide layer disposed on the free magnet, a follower magnet disposed on the oxide layer and a metallic cap disposed on the follower magnet. The metallic cap includes a metal such as Hf, W and Ta and further includes a trace amounts of an inert gas. One or more conductive nano-channels extend from the metallic cap through the free magnet and into the oxide layer, where each of the one or more conductive nano-channels include the material of the metallic cap. The memory device further includes an etch stop layer disposed on the metallic cap and a top electrode disposed on the etch stop layer.
Abstract:
Memory cells with improved tunneling magnetoresistance ratio (TMR) are disclosed. In some embodiments such devices may include a magnetoresistive tunnel junction (MTJ) element coupled in series with a tunneling magnetoresistance enhancement element (TMRE). The MTJ element and TMRE may each be configured to transition between high and low resistance states, e.g., in response to a voltage. In some embodiments, the MTJ and TMRE are configure such that when a read voltage is applied to the cell while the MTJ is in its low resistance state the TMRE is driven to is low resistance state, and when such voltage is applied while the MTJ is in its high resistance state, the TMRE remains in its high resistance state. Devices and systems including such memory cells are also disclosed.
Abstract:
Technologies for manufacturing spin transfer torque memory (STTM) elements are disclosed. In some embodiments, the technologies include methods for forming a step proximate an interface between a free magnetic layer and a dielectric layer of a magnetic tunnel junction. In some embodiments, the step may be defined by a spacer material, which may also serve to control the slope of the sidewalls of the dielectric layer and a fixed magnetic layer during the production of the device. As a result, an offset field exhibited by the STTM element may be reduced or even eliminated. Devices and systems including such STTM elements are also described.
Abstract:
Techniques are disclosed for fabricating a self-aligned spin-transfer torque memory (STTM) device with a dot-contacted free magnetic layer. In some embodiments, the disclosed STTM device includes a first dielectric spacer covering sidewalls of an electrically conductive hardmask layer that is patterned to provide an electronic contact for the STTM's free magnetic layer. The hardmask contact can be narrower than the free magnetic layer. The first dielectric spacer can be utilized in patterning the STTM's fixed magnetic layer. In some embodiments, the STTM further includes an optional second dielectric spacer covering sidewalls of its free magnetic layer. The second dielectric spacer can be utilized in patterning the STTM's fixed magnetic layer and may serve, at least in part, to protect the sidewalls of the free magnetic layer from redepositing of etch byproducts during such patterning, thereby preventing electrical shorting between the fixed magnetic layer and the free magnetic layer.
Abstract:
Methods and associated structures of forming a microelectronic device are described. Those methods comprise providing a substrate comprising a first transistor structure comprising an n-type gate material and second transistor structure comprising a p-type gate material, selectively removing the n-type gate material to form a recess in the first gate structure, and then filling the recess with an n-type metal gate material.