3D Memory Soft Error Detection via Layer Alignment
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Solution Overview
Problem
Existing techniques fail to accurately determine the cause of errors in three-dimensionally stacked memories, particularly distinguishing between soft errors due to radiation and other causes, and do not effectively identify the linear alignment of error positions across multiple layers.
Innovation Solution
A memory error determination device and computer program that detect errors in each layer of a three-dimensionally stacked memory, encode data with error correction or detection codes, and determine if error positions are linearly aligned across multiple layers to identify soft errors caused by radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If error detection techniques are implemented in three-dimensionally stacked memories, then error causes can be identified, but the complexity of the determination device increases
Solution Approach 1:
The patent extends traditional two-dimensional error detection to three-dimensional space by analyzing error positions across multiple stacked memory layers. The determination device detects errors in each layer, obtains three-dimensional position information, and analyzes linear alignment across layers to identify radiation-induced soft errors, thereby achieving accurate error cause identification without excessive complexity
Solution Approach 2:
The determination device segments the memory system into multiple independent layers and analyzes errors in each layer separately. By dividing the three-dimensionally stacked memory into individual layers and processing error information from each layer independently, the device can identify linear alignment patterns across layers while maintaining manageable computational complexity
2Reliability
If linear alignment detection across multiple layers is implemented, then soft errors due to radiation can be accurately determined, but the processing time and complexity increase
Solution Approach 1:
The determination device performs preliminary detection of error positions in each memory layer and stores this information for subsequent analysis. By pre-processing and storing error position data from each layer, the device can quickly perform linear alignment analysis when needed, reducing the time required for soft error determination while maintaining high accuracy
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
Enables accurate determination of whether errors in a three-dimensionally stacked memory are due to radiation, allowing for appropriate measures to be taken without unnecessary hardware replacement.
Implementation Method 1
radiation is incident on a memory being three-dimensionally stacked and collides with a silicon atom in the memory to generate a secondary ion
Implementation Method 2
collides with a silicon atom in the memory to generate a secondary ion, and an electron driven out of the silicon atom
Data Source
AI summary
The memory error determination device includes a processor configured to: detect a memory element in which an error has occurred in each of a plurality of layers included in a memory being three-dimensionally stacked, specify a position of each memory element in which the error has occurred in each of the plurality of layers, and determine that, when the position of each memory element in which the error has occurred is linearly aligned across a predetermined number of layers among the plurality of layers, the predetermined number being two or more, an error that has occurred in the memory is a soft error due to radiation incident on the memory.