Memory Chip Self-Recording Test Data for Failure Traceability
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Solution Overview
Problem
Conventional memory test methods do not record test results and parameters, making it difficult to trace back the testing process of memory chips, especially when failures occur, which complicates identifying the cause of issues after the chips are mounted on devices.
Innovation Solution
A memory test method that includes burn-in and high temperature test steps, where memory chips are tested with reading, writing, and electrical property tests in different temperature environments, with results and parameters stored on the chips for later retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If memory chips are tested in conventional environments without recording test results, then the testing process is simple, but it becomes difficult to trace back and diagnose failure issues after chips are mounted on devices
Solution Approach 1:
The memory chip stores its own test result data and test parameter data internally, enabling it to self-diagnose and self-identify failure causes without requiring external testing equipment or complex traceability systems. This self-service approach resolves the contradiction by preserving complete test information while maintaining testing simplicity.
Solution Approach 2:
The test result data and test parameter data are stored in the memory chip during the manufacturing testing process, before the chip is mounted on any device. This preliminary action ensures that complete test information is preserved from the outset, eliminating future diagnostic difficulties without adding complexity to the mounting or field operation processes.
2Ease of repair
If test result data and parameter data are stored in memory chips, then failure diagnosis becomes efficient, but the manufacturing process becomes more complex
Solution Approach 1:
The testing process and data storage function are merged into a single integrated operation. The test result data and test parameter data are written directly into the memory chip during the manufacturing test, combining the testing and data preservation steps. This merging simplifies the overall manufacturing process while enabling efficient failure diagnosis, as the data is captured and stored in one seamless operation rather than requiring separate testing and data management steps.
3Reliability
If multiple temperature tests are performed on memory chips, then test coverage and reliability improve, but testing time and complexity increase
Solution Approach 1:
The memory chip undergoes continuous testing across multiple temperature conditions (high temperature, normal temperature, and low temperature) without interruption. The test result data and test parameter data from each temperature condition are continuously accumulated and stored in the chip. This continuous testing approach maximizes reliability and test coverage while minimizing total testing time, as the chip remains in the testing system throughout the entire multi-temperature process rather than requiring removal and re-setup between tests.
Data Source
AI summary
A memory test method for being implemented by storing corresponding test result data and test parameter data into memory chips when a burn-in test, a high temperature test, a low temperature test, and a normal temperature test are performed on the memory chips. A memory test method for being implemented by storing the corresponding test result data and the test parameter data into the memory chips after the memory chips finish the burn-in test, the high temperature test, the low temperature test, and the normal temperature test. The memory chips can internally store the test result data and the test parameter data after finishing tests through the memory test method of the present disclosure so that relevant personnel can read data to easily trace back test history of the memory chips.