Semiconductor Device Independent Management Areas for Test Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current semiconductor devices face challenges in accurately identifying defective storage blocks during the sorting test due to connection failures between the device and the test apparatus, leading to incorrect determination of semiconductor devices as defective, which can result in good devices being discarded unnecessarily.
Innovation Solution
The implementation of a semiconductor device with independent first and second management areas for storing inspection results, where the first management area stores failure information by merging inspection results and the second management area stores initial inspection results, allowing for a sorting test that can re-evaluate bad blocks and correct previous inspection data to prevent misclassification of semiconductor devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single management area is used to store inspection results, then the device complexity is reduced, but the measurement precision of defective block identification deteriorates due to connection failures
Solution Approach 1:
The management area is divided into two independent parts: a first management area storing initial inspection results and a second management area storing sorting test results. This segmentation allows each area to preserve its data independently, preventing connection failures during sorting tests from corrupting the initial inspection data, thereby maintaining measurement precision while managing complexity through functional separation.
2Reliability
If inspection results are stored in a single management area, then the ease of operation is improved, but the reliability of inspection data deteriorates due to potential data loss from connection failures
Solution Approach 1:
By separating the management area into two independent storage regions, the patent ensures that initial inspection results remain protected from connection failures occurring during subsequent sorting tests. This maintains data integrity and reliability while the automated merging process manages operational complexity.
Solution Approach 2:
The patent creates a backup copy of inspection results by storing them in both the first management area (initial results) and the second management area (sorting test results). This copying mechanism ensures data redundancy and reliability, allowing the system to recover or verify data even if connection failures occur during one of the storage operations.
3Loss of information
If multiple inspections are performed and results are merged in a single management area, then the productivity is improved through comprehensive testing, but the loss of information increases due to overwriting of initial inspection results
Solution Approach 1:
The patent segments the management area into two distinct storage regions, allowing initial inspection results to be preserved in the first management area while sorting test results are stored in the second management area. This prevents information loss through overwriting, as each inspection phase has its dedicated storage space, while still enabling comprehensive testing through the merging of results from both areas for final defect identification.
Data Source
AI summary
A semiconductor device includes a first management area storing a plurality of inspection results, the plurality of inspection results being obtained by executing inspections for each of a plurality of storage areas which store a plurality of data; and a second management area storing the plurality of inspection results. The first and second management areas are independent from each other.