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category: Test & Analytics

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Adaptive NN-Based Root Cause Analysis in Volume Diagnosis for Yield Improvement
By Technical Paper Link - 02 Dec, 2021 - Comments: 0

Abstract "Root Cause Analysis (RCA) is a critical technology for yield improvement in integrated circuit manufacture. Traditional RCA prefers unsupervised algorithms such as Expectation Maximization based on Bayesian models. However, these methods are severely limited by the weak predictive capability of statistical models and can’t effectively transfer the yield learning experience from old... » read more

Improving Volume Diagnosis and Debug with Test Failure Clustering and Reorganization
By Technical Paper Link - 02 Dec, 2021 - Comments: 0

Abstract: "Volume diagnosis and debug play a key role in identifying systematic test failures caused by manufacturing defectivity, design marginalities, and test overkill. However, diagnosis tools often suffer from poor diagnosis resolution. In this paper, we propose techniques to improve diagnosis resolution by test failure clustering and reorganization. The effectiveness of our techniques ... » read more

Data-driven Scheduling for High-mix and Low-volume Production in Semiconductor Assembly and Testing
By Technical Paper Link - 03 Nov, 2021 - Comments: 0

Abstract: The objective of this research is to improve scheduling decisions in high-mix low-volume (HMLV) production environments. Unique characteristics of HMLV semiconductor assembly and testing operations include: (1) Diversified Product Lines: To respond to global competition and different customer needs, manufacturers are providing diversified products to different consumers; (2) Unrelate... » read more

Convolutional Compaction-Based MRAM Fault Diagnosis
By Technical Paper Link - 03 Sep, 2021 - Comments: 0

Abstract: "Spin-transfer torque magnetoresistive random-access memories (STT-MRAMs) are gradually superseding conventional SRAMs as last-level cache in System-on-Chip designs. Their manufacturing process includes trimming a reference resistance in STT-MRAM modules to reliably determine the logic values of 0 and 1 during read operations. Typically, an on-chip trimming routine consists of mult... » read more

MBIST-supported Trim Adjustment to Compensate Thermal Behavior of MRAM
By Technical Paper Link - 03 Sep, 2021 - Comments: 0

Abstract: "Spin Transfer Torque Magnetic Random Access Memory (STT-MRAM) is one of the most promising candidates to replace conventional embedded memory such as Static RAM and Dynamic RAM. However, due to the small on/off ratio of MRAM cells, process variations may reduce the operating margin of a chip. Reference trimming was suggested as one of the ways to reduce variation impact to the chi... » read more

Intermittent Undefined State Fault in RRAMs
By Technical Paper Link - 03 Sep, 2021 - Comments: 1

Abstract: " Industry is prototyping and commercializing Resistive Random Access Memories (RRAMs). Unfortunately, RRAM devices introduce new defects and faults. Hence, high-quality test solutions are urgently needed. Based on silicon measurements, this paper identifies a new RRAM unique fault, the Intermittent Undefined State Fault (IUSF); this fault causes the RRAM device to intermittently c... » read more

Adaptive Test With Test Escape Estimation for Mixed-Signal ICs
By Technical Paper Link - 31 Dec, 2017 - Comments: 0

Abstract: The standard approach in industry for post-manufacturing testing of mixed-signal circuits is to measure the performances that are included in the data sheet. Despite being accurate and straightforward, this approach involves a high test time since there are numerous performances that need to be measured sequentially by switching the circuit into different test configurations. Adapt... » read more

What we know after twelve years developing and deploying test data analytics solutions
By Technical Paper Link - 31 Dec, 2016 - Comments: 0

Abstract: Since 2004, Texas Instruments and Portland State University have collaborated to develop and deploy test data analytical methods for use in a variety of applications, including quality screening, burn-in minimization, high cost test replacement and/or removal, and operations monitoring. In this paper, key findings amassed during this time are summarized. Find the technical paper h... » read more

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