tag: yield

Next Steps For Panel-Level Packaging
By Mark LaPedus - 20 Dec, 2021 - Comments: 1

Tanja Braun, group manager at Fraunhofer Institute for Reliability and Microintegration (IZM), sat down with Semiconductor Engineering to talk about III-V device packaging, chiplets, fan-out and panel-level processing. Fraunhofer IZM recently announced a new phase of its panel-level packaging consortium. What follows are excerpts of that discussion. SE: IC packaging isn’t new, but years a... » read more

Using Manufacturing Data To Boost Reliability
By Ed Sperling and Ann Mutschler - 07 Dec, 2021 - Comments: 0

As chipmakers turn to increasingly customized and complex heterogeneous designs to boost performance per watt, they also are demanding lower defectivity and higher yields to help offset the rising design and manufacturing costs. Solving those issues is a mammoth multi-vendor effort. There can be hundreds of process steps in fabs and packaging houses. And as feature sizes continue to shrink, ... » read more

Speeding Up Scan-Based Volume Diagnosis
By Bryon Moyer - 07 Dec, 2021 - Comments: 0

In the critical process known as new-product bring-up, it’s a race to get new products to yield as quickly as possible. But the interplay between increasingly complex aspects of designs and process makes it difficult to find root causes of yield issues so they can be fixed quickly. Advanced processes have very high defectivity, and learning must be fast and effective. While progress has be... » read more

Big Payback For Combining Different Types Of Fab Data
By Anne Meixner - 07 Dec, 2021 - Comments: 1

Collecting and combining diverse data types from different manufacturing processes can play a significant role in improving semiconductor yield, quality, and reliability, but making that happen requires integrating deep domain expertise from various different process steps and sifting through huge volumes of data scattered across a global supply chain. The semiconductor manufacturing IC data... » read more

Adaptive NN-Based Root Cause Analysis in Volume Diagnosis for Yield Improvement
By Technical Paper Link - 02 Dec, 2021 - Comments: 1

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

Enablers And Barriers For Connecting Diverse Data
By Anne Meixner - 09 Nov, 2021 - Comments: 0

More data is being collected at every step of the manufacturing process, raising the possibility of combining data in new ways to solve engineering problems. But this is far from simple, and combining results is not always possible. The semiconductor industry’s thirst for data has created oceans of it from the manufacturing process. In addition, semiconductor designs large and small now ha... » read more

Coping With Parallel Test Site-to-Site Variation
By Anne Meixner - 09 Nov, 2021 - Comments: 1

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

Novel Reversible Chain Diagnosis Improves Resolution
By Jayant D'Souza - 09 Nov, 2021 - Comments: 0

Yield ramp for ICs designed on advanced process technologies faces new challenges because of the very complicated silicon defect types and defect distribution. Yield ramp and yield improvement are not just about profitability and time-to-market, but also have a role in today’s electronics supply chain crisis. That means yield ramp affects not just the IC maker, but the global economy. Ever... » read more

One Test Is Not Always Enough
By Anne Meixner - 12 Oct, 2021 - Comments: 0

To improve yield, quality, and cost, two separate test parameters can be combined to determine if a part passes or fails. The results gleaned from that approach are more accurate, allowing test and quality engineers to fail parts sooner, detect more test escapes, and ultimately to improve yield and reduce manufacturing costs. New data analytic platforms, combined with better utilization of s... » read more

Advanced Outlier Die Control Technology In Fan-Out Panel Level Packaging Using Feedforward Lithography
By Onto Innovation - 12 Oct, 2021 - Comments: 0

The growing demand for heterogeneous integration is driven by the 5G market that includes smartphones, data centers, servers, HPC, AI and IoT applications. Next-generation packaging technologies require tighter overlay to accommodate a larger package size with finer pitch chip interconnects on large format flexible panels. Fan-out panel level packaging (FOPLP) is one of the technologies that... » read more

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