Hydrogen-Mediated Threshold Voltage Modulation in Metal Oxide Memory
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Solution Overview
Problem
As semiconductor devices scale down, there is a need for new types of semiconductor memory cells that offer high endurance and low operational power, which existing technologies have not adequately addressed.
Innovation Solution
The integration of a hydrogen-containing metal layer, comprising platinum, iridium, or osmium, adjacent to a semiconducting metal oxide layer, allows for reversible hydrogen insertion and extraction, modulating the threshold voltage and conductivity of the memory device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing memory technologies are used, then device functionality is maintained, but high endurance and low operational power requirements are not met
Solution Approach 1:
The patent changes the electrical parameters of the memory device by introducing hydrogen atoms as shallow donors in the semiconducting metal oxide layer. This modifies the threshold voltage and conductivity states, enabling high endurance through stable hydrogen insertion/extraction cycles while maintaining low operational power due to the shallow donor effect that requires less energy for state transitions
Solution Approach 2:
Hydrogen atoms serve as an intermediary mechanism between the metal layer and the semiconducting metal oxide layer. The hydrogen mediates the threshold voltage modulation by acting as a mobile dopant that can be reversibly inserted and extracted, enabling non-volatile memory states with high endurance and low power consumption
2Area of moving object
If device dimensions are scaled down, then integration density is improved, but new memory cell types with high endurance and low power are required
Solution Approach 1:
The invention changes the fundamental operating parameters of scaled-down memory devices by using hydrogen-mediated threshold voltage modulation. This approach maintains high endurance even at smaller dimensions because the hydrogen insertion/extraction mechanism is not dependent on device size, and the shallow donor effect remains effective in scaled structures
Solution Approach 2:
The patent employs a composite structure combining a metal layer (platinum, iridium, or osmium) with a semiconducting metal oxide layer. This composite material system enables high endurance in scaled devices through the synergistic interaction between the metal and oxide, where the metal provides hydrogen storage and the oxide provides the active channel for threshold voltage modulation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the creation of memory devices with variable conductivity and threshold voltages, achieving high endurance and low power consumption by utilizing hydrogen atoms as shallow donors within the semiconducting metal oxide layer.
Implementation Method 1
allows for reversible hydrogen insertion and extraction, modulating the threshold voltage and conductivity of the memory device
Implementation Method 2
modulating the threshold voltage and conductivity of the memory device
Implementation Method 3
achieving high endurance and low power consumption by utilizing hydrogen atoms as shallow donors within the semiconducting metal oxide layer
Data Source
AI summary
A memory device is provided, which may include a first electrode, a memory layer stack including at least one semiconducting metal oxide layer and at least one hydrogen-containing metal layer, and a second electrode. A semiconductor device is provided, which may include a semiconducting metal oxide layer containing a source region, a drain region, and a channel region, a hydrogen-containing metal layer located on a surface of the channel region, and a gate electrode located on the hydrogen-containing metal layer. Each hydrogen-containing metal layer may include at least one metal selected from platinum, iridium, osmium, and ruthenium at an atomic percentage that is at least 90%, and may include hydrogen atoms at an atomic percentage in a range from 0.001% to 10%. Hydrogen atoms may be reversibly impregnated into a respective semiconducting metal oxide layer to change resistivity and to encode a memory bit.