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Coping With Parallel Test Site-to-Site Variation


Testing multiple devices in parallel using the same ATE results in reduced test time and lower costs, but it requires engineering finesse to make it so. Minimizing test measurement variation for each device under test (DUT) is a multi-physics problem, and it's one that is becoming more essential to resolve at each new process node and in multi-chip packages. It requires synchronization of el... » read more

Geo-Spatial Outlier Detection


Comparing die test results with other die on a wafer helps identify outliers, but combining that data with the exact location of an outlier offers a much deeper understanding of what can go wrong and why. The main idea in outlier detection is to find something in or on a die that is different from all the other dies on a wafer. Doing this in the context of a die’s neighbor has become easie... » read more

Data Issues Mount In Chip Manufacturing


For yield management systems the old calculation adage, "garbage in/garbage out" still rings true. Aligning and cleaning data remains a dirty business. With the increased value in data in the semiconductor supply chain, there now are essentially two supply chains running in parallel. One involves the physical product being created, while the other includes the data associated with each proce... » read more

Too Much Fab And Test Data, Low Utilization


Can there be such a thing as too much data in the semiconductor and electronics manufacturing process? The answer is, it depends. An estimated 80% or more of the data collected across the semiconductor supply chain is never looked at, from design to manufacturing and out into the field. While this may be surprising, there are some good reasons: Engineers only look at data necessary to s... » read more

Week In Review: Manufacturing, Test


Fab tools, packaging/test VLSI Research has released its 200mm wafer fab equipment (WFE) market share figures for 2019. The top three suppliers--Applied Materials, TEL, and ASML—saw growth in the 2019 200mm WFE business. Lam Research was in fourth place, followed by KLA and Canon. In total, 200mm wafer fab equipment sales were $3.6 billion in 2019, declining 5% from 2018, according to the fi... » read more

Week In Review: Design, Low Power


Galaxy Semiconductor re-established with the planned acquisition of the Quantix Business assets from Mentor, a Siemens business. The software products Galaxy is acquiring focus on yield optimization, device characterization, and reliability improvement. Galaxy was initially founded in 1998; the Galway, Ireland-based company was then acquired by Mentor Graphics in 2016. The re-established compan... » read more

The Week In Review: Design


M&A Mentor Graphics acquired Galaxy Semiconductor, a provider of test data analysis and defect reduction software ranging from initial characterization of sample devices to automated yield management of large-scale production. The Galway, Ireland company was founded in 1998. Terms of the deal were not disclosed. IP Imagination rolled out a new heterogeneous MIPS CPU with many core/... » read more