Temperature-Based Read Voltage Control for Non-Volatile Memory
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Non-volatile memory devices experience read errors and performance degradation due to unpredictable conditions such as temperature changes and electron migration, leading to increased latency and physical damage from iterative retry attempts with default read voltages.
Innovation Solution
Implementing dynamic read voltage adjustment based on temperature profiling and cross temperature to determine optimal read voltages for non-volatile memory devices, reducing read errors and latency by monitoring and updating read voltages based on temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If default read voltages are used for non-volatile memory devices, then device complexity is reduced, but read errors increase and reliability deteriorates due to temperature changes and electron migration
Solution Approach 1:
The patent implements dynamic read voltage adjustment based on temperature profiling and cross temperature effects. The system transitions from static default voltages to dynamic voltage selection that adapts to real-time temperature conditions, thereby reducing read errors while managing complexity through algorithmic control rather than hardware complexity
Solution Approach 2:
The patent changes the read voltage parameter dynamically based on temperature conditions. By adjusting the voltage parameter according to temperature profiling and cross temperature effects, the system maintains optimal read conditions across varying thermal environments, improving reliability without requiring multiple fixed voltage circuits
2Reliability
If iterative retry attempts with default read voltages are performed, then read operations may eventually succeed, but latency increases and physical damage occurs to the memory device
Solution Approach 1:
The patent performs preliminary temperature profiling and cross temperature analysis before executing read operations. By determining the appropriate read voltage in advance based on temperature conditions, the system avoids iterative retry attempts and reduces latency while preventing physical damage from repeated read operations
Solution Approach 2:
The patent incorporates feedback mechanisms that monitor temperature conditions and adjust read voltages accordingly. This feedback loop prevents unnecessary retry attempts by proactively selecting optimal voltages, thereby reducing latency and avoiding the physical stress caused by iterative operations
3Reliability
If read voltage is adjusted dynamically based on temperature, then read errors are reduced and reliability improves, but device complexity and control complexity increase
Solution Approach 1:
The patent implements self-service mechanisms where the memory device autonomously performs temperature profiling and determines appropriate read voltages without external intervention. The device monitors its own temperature conditions and adjusts voltages automatically, improving reliability while minimizing the complexity burden on external controllers
Solution Approach 2:
The patent creates a universal voltage determination mechanism that handles multiple temperature scenarios and read conditions through a single integrated approach. By using temperature profiling and cross temperature effects as universal guiding principles, the system manages complexity through a unified control strategy rather than multiple specialized circuits
Data Source
AI summary
In some implementations, a controller may receive, from a host device, a read command to access data stored on a non-volatile memory device. The controller may determine a read voltage based on a temperature associated with the non-volatile memory device. The controller may perform, based on the read command, a read operation using the read voltage to access the data. The controller may provide the data to the host device.