Memory Device Temperature-Dependent Operation Management
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Solution Overview
Problem
Memory devices experience increased error rates and performance degradation due to high operating temperatures, particularly during program/erase cycling, leading to lower raw bit error rate (RBER) and cross-temperature trigger rates.
Innovation Solution
Implementing a temperature-dependent operation manager that delays background operations in memory devices when temperatures exceed a threshold, allowing host system operations to continue while resuming background tasks at lower temperatures to prepare memory blocks for future write requests, thereby mitigating temperature-induced errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If background operations are executed continuously in the memory device, then productivity is improved, but reliability deteriorates due to increased error rates at high temperatures
Solution Approach 1:
The patent implements dynamic operation management by continuously monitoring temperature and adjusting background operation execution accordingly. When temperature exceeds the threshold, background operations are suspended; when temperature is below the threshold, operations are executed. This dynamic adaptation resolves the contradiction by making the system flexible rather than static, allowing it to maintain reliability while maximizing productivity under favorable conditions.
Solution Approach 2:
The patent changes the operational parameter (background operation execution) based on the temperature parameter. By establishing a temperature threshold and comparing actual temperature against it, the system modifies its behavior - executing operations when cool and suspending them when hot. This parameter-based control strategy directly addresses the contradiction by linking operational state to environmental conditions.
2Reliability
If background operations are delayed when temperature exceeds threshold, then reliability is improved by reducing error rates, but productivity deteriorates due to suspended operations
Solution Approach 1:
The patent implements periodic temperature monitoring and operation suspension/resumption cycles. Instead of continuous operation with constant risk of errors, the system periodically checks temperature and adjusts operation status. This creates a rhythm of execution and suspension that prioritizes reliability during high-temperature periods while maintaining productivity during low-temperature periods, resolving the contradiction through temporal distribution of operations.
Solution Approach 2:
The patent takes preliminary anti-action by suspending background operations before temperature-induced errors can occur. By proactively monitoring temperature and preemptively stopping operations when the threshold is approached, the system prevents errors rather than reacting to them after they occur. This preliminary protective measure resolves the contradiction by prioritizing reliability prevention while minimizing productivity impact through targeted suspension rather than continuous operation.
3Reliability
If temperature monitoring and conditional operation management is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where temperature is continuously monitored and the background operation status is adjusted based on the temperature reading. The temperature threshold comparison creates a feedback loop that automatically controls operation execution. This feedback-based approach resolves the contradiction by providing a simple, automated control mechanism that improves reliability without requiring complex manual intervention or elaborate control systems.
Solution Approach 2:
The patent enables the memory device to self-regulate its background operations based on its own temperature conditions. The device monitors itself and automatically makes decisions about operation execution without external intervention. This self-service capability resolves the contradiction by implementing reliability management through a simple autonomous mechanism rather than complex external control systems, minimizing the added complexity while maximizing the reliability benefit.
Data Source
AI summary
A method and system for temperature-dependent operations in a memory device are described. Temperature measurements of a memory device are recorded. A determination that a temperature measurement of the memory device satisfies a threshold temperature value is performed. In response to the determination, execution of a background operation in the memory device is delayed, and host system operation(s) continue to be executed in the memory device while execution of the background operation is delayed.