Storage Device Region-Specific Initial Program Voltage Control
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Solution Overview
Problem
Storage devices face performance inconsistencies due to variations in manufacturing processes, leading to differing program execution times across memory regions.
Innovation Solution
A storage device with a memory cell array divided into regions, where a device controller selects initial program voltages based on regions to maintain consistent performance by using different initial program voltages for programming data, with a power management device, voltage divider, and switching circuit to manage and apply these voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single initial program voltage is used for all memory regions, then device complexity is reduced, but program execution time becomes inconsistent across regions
Solution Approach 1:
The memory device is divided into multiple regions (first region and second region), each with its own initial program voltage. The voltage management unit provides different initial program voltages to different regions based on their specific characteristics, thereby resolving the time consistency issue while maintaining manageable complexity through structured segmentation.
Solution Approach 2:
Different initial program voltages are applied to different memory regions according to their local characteristics. The voltage management unit selectively provides a first initial program voltage to the first region and a second initial program voltage to the second region, optimizing program execution time for each region's specific needs rather than using a uniform voltage across all regions.
2Loss of time
If different initial program voltages are applied to different memory regions, then program execution time consistency is improved, but device complexity increases
Solution Approach 1:
The voltage management unit performs multiple functions: it generates both the first and second initial program voltages, selects the appropriate voltage based on the target region, and provides the selected voltage to the memory device. This multi-functional approach consolidates voltage management complexity into a single unit rather than distributing it across multiple components.
Solution Approach 2:
The voltage management unit acts as an intermediary between the power supply and the memory regions. It receives power input and selectively outputs the appropriate initial program voltage to the first or second region based on the region's characteristics, thereby simplifying the overall system architecture while achieving region-specific optimization.
3Quantity of substance
If memory capacity is increased through stacking or higher cell bit density, then storage capacity is improved, but manufacturing process variations cause performance inconsistency
Solution Approach 1:
The patent changes the voltage parameter (initial program voltage) to compensate for manufacturing variations. By providing different initial program voltages to different regions, the system adjusts the programming conditions to account for process variations, thereby maintaining performance consistency across the entire memory device even as capacity increases through stacking or higher cell bit density.
Data Source
AI summary
A memory device of a storage device includes a memory cell array divided into a plurality of regions including a first region and a second region. The device controller is configured to control the storage device so as to allow the memory device to program first data into the first region using a first initial program voltage, and to program second data into the second region using a second initial program voltage having a different magnitude from the first initial program voltage.