Semiconductor Memory Row Drivers for Voltage Drop Compensation
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Solution Overview
Problem
Semiconductor memory reliability is compromised due to varying voltage drops across memory cells in a memory cell array, affecting program and read operations, as the distance from drivers to memory cells differs, leading to potential failures in operations.
Innovation Solution
The implementation of semiconductor memory with a cross-point structure, where first and second row drivers and column drivers are strategically positioned to compensate for voltage drops by jointly driving common row and column lines, ensuring consistent voltage application across memory cells, thereby preventing reliability degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If memory cells are disposed at various positions in the memory cell array, then the storage capacity and coverage are improved, but voltage drops vary across different positions leading to reliability degradation
Solution Approach 1:
The patent divides the single row driver function into multiple row drivers positioned at different locations (first row driver at first location, second row driver at second location). Each row driver is responsible for driving row lines in its respective region, which segments the voltage distribution problem and ensures that no memory cell is too far from a driver, thereby maintaining consistent voltage levels across the entire memory cell array regardless of position.
2Device complexity
If drivers are positioned at specific locations, then voltage control is simplified, but memory cells at distant positions experience excessive voltage drops
Solution Approach 1:
The patent applies local quality by positioning row drivers and column drivers at specific locations around the memory cell array perimeter. Each driver is optimally positioned to serve its local region, with the first row driver serving row lines in its vicinity and the second row driver serving row lines in its vicinity. This localized driving approach ensures that voltage levels remain consistent for memory cells in each local region while maintaining overall system reliability.
Data Source
AI summary
Provided is an electronic device including a semiconductor memory. The semiconductor memory may include a memory region comprising a plurality of memory cells disposed at respective intersections between a plurality of row lines and a plurality of column lines, the plurality of row lines extending in a first direction, the plurality of column lines extending in a second direction crossing the first direction; first and second row drivers arranged on one side and the other side of the memory region in the first direction, respectively, and driving a common row line corresponding to a row address among the plurality of row lines; and a column driver driving a common column line corresponding to a column address among the plurality of column lines, wherein the first and second row drivers are coupled to the common row line.