Non-Volatile Memory Annealing with Thermal Shielding
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Solution Overview
Problem
Repetitive writing and erasing in non-volatile memory can damage storage media, leading to data errors and reduced lifespan, while thermal annealing to reverse damage can cause further charge leakage and errors, making it impractical to anneal operating memory.
Innovation Solution
An apparatus and method that include a heating element to anneal one set of non-volatile memory elements while using a heat shield or cooling element to prevent overheating and data errors in another set, thereby mitigating the risks associated with thermal annealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If thermal annealing is applied to non-volatile memory to reverse damage from writing and erasing, then the longevity and endurance of the memory device is improved, but charge leakage and data errors occur due to high annealing temperatures
Solution Approach 1:
The memory array is divided into multiple independently controllable banks or regions. During annealing operations, only specific segments are heated to the required temperature while other segments remain at normal operating temperature, allowing error-free data to be preserved in cooler segments while damaged segments are repaired.
Solution Approach 2:
Different temperature conditions are applied to different spatial regions of the memory device. The annealing process creates localized high-temperature zones only where needed for repair, while other regions maintain their normal operational characteristics, thus preventing widespread charge leakage and data errors.
2Manufacturing precision
If high annealing temperatures are used to restore trap sites, then the number of defects is reduced, but charge leakage increases making it impractical to anneal operating memory
Solution Approach 1:
The memory structure is segmented into independently addressable regions with separate thermal control. This allows the annealing process to be applied locally to only those regions containing damaged cells, minimizing the total volume exposed to high temperatures and thereby reducing overall charge leakage while maintaining effective defect restoration in the treated regions.
Solution Approach 2:
A heat shield or thermal barrier structure is introduced as an intermediary between the heating element and the memory cells. This mediator allows precise control of thermal energy distribution, enabling sufficient heat delivery to restore trap sites while blocking excessive heat that would cause charge leakage and data errors.
3Productivity
If repeated writing and erasing operations are performed to utilize memory capacity, then data storage functionality is maintained, but cumulative damage increases limiting useful lifetime
Solution Approach 1:
The annealing capability is prepared in advance as a preventive maintenance function. By periodically applying annealing treatments before cumulative damage becomes critical, the memory device can restore degraded cells and extend its operational life, allowing continued high-productivity use without permanent degradation from repeated write/erase cycles.
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 effectively reverses damage in non-volatile memory while minimizing data errors and extending the useful life of the memory devices by carefully managing temperature during the annealing process.
Implementation Method 1
a resistive heating element that produces heat to anneal a first set of non-volatile memory elements
Implementation Method 2
a cooling element cools a second set of non-volatile memory elements, in proximity to the first set of non-volatile memory elements
Implementation Method 3
a heat shield is configured to mitigate heating for a second set of the non-volatile storage elements during annealing of the first set of non-volatile storage elements
Data Source
AI summary
Apparatuses, systems, methods, and computer program products are disclosed for preventing overheating, for annealing non-volatile memory. An apparatus may include an array of non-volatile storage elements. A heating element may be configured to heat a first set of the non-volatile storage elements to anneal the first set of non-volatile storage elements. A heat shield or cooling element may be configured to prevent a second set of the non-volatile storage elements from overheating during annealing of the first set of non-volatile storage elements, to mitigate data errors for data stored on the second set of non-volatile storage elements.