Memory Temperature Control Using Selective Word Line Heating
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Solution Overview
Problem
Memory devices experience performance degradation due to temperature fluctuations, which existing thermal management systems fail to adequately address, leading to potential data loss and reduced reliability.
Innovation Solution
A memory system and method that includes a control logic to manage temperature by performing low temperature management operations, such as dummy read, program, and erase operations, while limiting the transfer of local word line apply voltage, thereby increasing the device temperature without stressing memory cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If dummy operations are performed to increase memory device temperature, then temperature management is improved, but memory cell stress increases
Solution Approach 1:
The patent segments the voltage application by selectively controlling which word lines receive the local word line apply voltage during dummy operations. By dividing the word line array into selected and non-selected groups, the patent applies voltage only to specific regions, thereby increasing temperature in targeted areas while minimizing overall memory cell stress.
Solution Approach 2:
The patent implements local quality by applying different voltage conditions to different word lines. Selected word lines receive the local word line apply voltage to generate heat, while non-selected word lines do not receive this voltage. This creates localized heating zones that raise memory device temperature without uniformly stressing all memory cells.
2Reliability
If thermal management operations are not performed, then memory cell stress is reduced, but temperature control capability deteriorates
Solution Approach 1:
The patent implements dynamic temperature control by adjusting the selection of word lines that receive voltage based on real-time temperature conditions. The control logic dynamically determines which word lines to activate for heating purposes, allowing the system to adapt to varying thermal conditions while maintaining memory cell reliability through selective rather than continuous voltage application.
Solution Approach 2:
The patent enables the memory device to self-regulate its temperature through internal dummy operations controlled by temperature management logic. The system monitors its own temperature conditions and autonomously performs selective voltage application to maintain optimal operating temperature ranges without requiring external intervention, thereby preserving memory cell stress levels while maintaining temperature control capability.
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 maintains and increases the temperature of memory devices, enhancing performance and reliability by preventing data loss and cell stress, even in low temperature conditions.
Implementation Method 1
performing low temperature management operations, such as dummy read, program, and erase operations... effectively maintains and increases the temperature of memory devices
Data Source
AI summary
The present technology relates to an electronic device. According to the present technology, a memory device may include a memory block including a plurality of memory cells, a peripheral circuit configured to generate operation voltages for the plurality of memory cells and transfer the operation voltages to the memory block through bit lines and word lines, and a control logic configured to control, based on temperature information of the memory device, the peripheral circuit to perform a low temperature management operation of increasing a temperature of the memory device. The peripheral circuit may transfer the operation voltages while limiting transferal of a local word line apply voltage to be applied to the memory block through the word lines in response to the low temperature management operation, the local word line apply voltage being included in the operation voltages.