Variable Resistance Layer Metal-Metal Bonding Breakdown Voltage
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Solution Overview
Problem
There is a need to reduce the breakdown voltage in nonvolatile memory devices using variable resistance elements to minimize power consumption and enhance performance.
Innovation Solution
A nonvolatile memory element is designed with a variable resistance layer comprising a first metal oxide and a second metal oxide with a low degree of oxygen deficiency, where the second metal oxide includes a metal-metal bonding region, allowing for a reduction in breakdown voltage by forming a conductive path at a lower voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If metal oxide layers with different degrees of oxygen deficiency are stacked to form a variable resistance layer, then the nonvolatile memory element can achieve resistance state changes, but the breakdown voltage is too high which increases power consumption
Solution Approach 1:
The patent applies local quality by creating a metal-metal bonding region with distinct properties within the second metal oxide layer. This localized region has different oxygen deficiency and bonding characteristics compared to the surrounding areas, enabling it to form conductive paths at lower voltages while the rest of the layer maintains its insulating properties. This resolves the contradiction by locally modifying the layer to reduce breakdown voltage without compromising the overall resistance change functionality.
Solution Approach 2:
The patent uses composite materials by stacking multiple metal oxide layers with different compositions and oxygen deficiencies. The first metal oxide layer has one degree of oxygen deficiency while the second metal oxide layer has a different degree and contains metal-metal bonding regions. This composite structure combines the advantages of different materials to achieve both stable resistance changes and reduced breakdown voltage, thereby lowering power consumption.
2Productivity
If a breakdown voltage is applied to initialize the variable resistance layer, then the layer can function as intended, but the high voltage requirement limits further miniaturization and performance improvement
Solution Approach 1:
The patent applies parameter changes by modifying the oxygen deficiency degree and creating metal-metal bonding regions in the second metal oxide layer. These parameter changes enable the layer to undergo resistance transitions at lower voltage thresholds, reducing both the breakdown voltage and the voltage required for normal operation. This resolves the contradiction by enabling faster writing speeds with reduced power consumption through controlled changes in material parameters.
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
The solution effectively reduces the breakdown voltage, enabling more stable resistance changes and lower power consumption in nonvolatile memory devices, thereby improving their performance and efficiency.
Implementation Method 1
the second metal oxide layer includes a metal-metal bonding region including a metal bond of metal atoms included in the second metal oxide
Implementation Method 2
a variable resistance layer which is positioned between the first electrode and the second electrode, the variable resistance layer having a resistance state which reversibly changes based on an electrical signal applied between the first electrode and the second electrode
Data Source
AI summary
A nonvolatile memory element includes a first electrode, a second electrode, and a variable resistance layer positioned between the first electrode and the second electrode. The variable resistance layer has a resistance state which reversibly changes based on an electrical signal applied between the first electrode and the second electrode. The variable resistance layer includes a first variable resistance layer having a first metal oxide and a second variable resistance layer having a second metal oxide. The second variable resistance layer includes a metal-metal bonding region including a metal bond of metal atoms included in the second metal oxide, and the second metal oxide has a low degree of oxygen deficiency and a high resistance value compared to the first metal oxide.