Deck-Specific Read-Level Adjustment After Manufacturing Stress
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Solution Overview
Problem
Memory devices experience performance degradation and errors due to environmental stress during manufacturing processes, leading to inefficiencies and delays in updating preloaded data.
Innovation Solution
A mechanism in memory devices that automatically assesses the impact of environmental stress on preloaded data, allowing for timely refresh operations and adjustments to read positions, thereby maintaining data integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If memory devices are preloaded with data during manufacturing, then data availability is improved, but data integrity deteriorates due to environmental stress during manufacturing processes
Solution Approach 1:
The patent applies preliminary action by performing a scan of the memory device during or after the manufacturing process to assess the impact of environmental stress on preloaded data before the device is deployed. This early detection allows the system to proactively adjust refresh schedules and read positions to maintain data integrity without requiring manual intervention after deployment.
Solution Approach 2:
The patent implements feedback by using scan results to dynamically adjust refresh schedules and read positions based on the actual impact of environmental stress. The system continuously monitors data integrity through scanning and uses this information to optimize subsequent operations, creating a closed-loop system that adapts to manufacturing conditions.
2Measurement precision
If manual intervention is used to update preloaded data, then data accuracy is improved, but productivity deteriorates due to delays and inefficiencies
Solution Approach 1:
The patent applies self-service by enabling the memory device to automatically assess its own data integrity through scanning and to autonomously adjust refresh schedules and read positions without requiring manual intervention. The device monitors itself and makes necessary corrections independently, eliminating delays associated with manual updates while maintaining data accuracy.
3Reliability
If refresh operations are performed frequently to maintain data integrity, then reliability is improved, but use of energy deteriorates due to increased operational overhead
Solution Approach 1:
The patent applies dynamics by making the refresh schedule adaptive rather than fixed. The system dynamically adjusts the frequency and timing of refresh operations based on the actual impact of environmental stress detected during scanning. This allows the system to perform refresh operations only when necessary, optimizing the balance between data integrity and energy consumption.
Solution Approach 2:
The patent implements parameter changes by modifying refresh schedule parameters and read position parameters based on scan results. The system changes these parameters dynamically to match the actual condition of the memory device, allowing for optimized energy consumption while maintaining data integrity under varying environmental conditions.
Data Source
AI summary
Methods, apparatuses and systems related to managing deck-specific read levels are described. The apparatus may include a memory array having the memory cells organized into two or more decks. The apparatus can determine a delay between programming the decks. The apparatus can derive and implement the deck-specific read levels by selectively adjusting a base read level with an offset level according to the delay and/or the targeted read location.