tag: DFT

Functional Compaction for Functional Test Sequences (Purdue University, I. Pomeranz)
By Technical Paper Link - 17 Jul, 2024 - Comments: 0

A new technical paper titled "Functional Compaction for Functional Test Sequences" was published by IEEE Fellow Irith Pomeranz at Purdue University. Abstract: "The occurrence of silent data corruption because of hardware defects in large scale data centers points to the advantages of applying functional test sequences to detect hardware defects that escape scan-based tests. When using funct... » read more

Overview of Test Strategies for 3DICs
By Technical Paper Link - 26 Jun, 2024 - Comments: 0

A new technical paper titled "Design-for-Test Solutions for 3D Integrated Circuits" was published by researchers at Duke University, Arizona State University, and NVIDIA. Abstract: "As Moore's Law approaches its limits, 3D integrated circuits (ICs) have emerged as promising alternatives to conventional scaling methodologies. However, the benefits of 3D integration in terms of lower power co... » read more

Understanding Scandump: A Key Silicon Debugging Technique
By Vincent Yang - 13 Jun, 2024 - Comments: 0

Scandump is an advanced silicon debugging technique that ingeniously repurposes DFT (Design For Testability) scan chains for functional debugging. This method allows for the extraction of states from registers or latches that are stitched into the scan chains, providing critical diagnostic insights. Scandump is particularly invaluable when the CPU is deadlocked or when the system hardware bec... » read more

Hidden Costs And Tradeoffs In IC Quality
By Gregory Haley - 08 Feb, 2024 - Comments: 0

Balancing reliability against cost is becoming more difficult for semiconductor test, as chip complexity increases and devices become more domain-specific. Tests need to be efficient and effective without breaking the bank, while also ensuring chips are of sufficient quality for their specific application. The problem is that every new IC device adds its own set of challenges, from smaller f... » read more

Closing The Test And Metrology Gap In 3D-IC Packages
By Gregory Haley - 12 Dec, 2023 - Comments: 0

The industry is investing in more precise and productive inspection and testing to enable advanced packages and eventually, 3D ICs. The next generations of aerospace, automotive, smartphone, and wearable tech most likely will be powered by multiple layers of intricately connected silicon, a stark departure from the planar landscapes of traditional integrated circuits. These 3D-ICs, compos... » read more

Advanced DFT And Silicon Bring-Up For AI Chips
By Lee Harrison - 07 Dec, 2023 - Comments: 0

The AI market is growing quickly, spurring an insatiable demand for powerful AI accelerators. AI chip makers are pressed with aggressive time-to-market goals and need the tools to help them get their chips into the hands of customers as quickly as possible. IC test and silicon bring-up are tasks that can affect both the quality and the time-to-market of AI chips. Different companies are usin... » read more

Use Advanced DFT And Silicon Bring Up To Accelerate AI Chip Design
By Siemens EDA - 07 Dec, 2023 - Comments: 0

The market for AI chips is growing quickly, with the 2022 revenue of $20B expected to grow to over $300B by 2030. To keep up with the demand and stay competitive, AI chip designers set aggressive time-to-market goals. Design teams looking for ways to shave significant time off chip development time can look to advanced DFT and silicon bring up techniques described in this paper, including hiera... » read more

An Entangled Heterarchy
By Brian Bailey - 09 Nov, 2023 - Comments: 1

For decades, a form of structural hierarchy has been the principal means of handling complexity in chip design. It's not always perfect, and there is no ideal way in which to divide and conquer because that would need to focus on the analysis being performed. In fact, most systems can be viewed from a variety of different hierarchies, equally correct, and together forming a heterarchy. The e... » read more

DRAM Test And Inspection Just Gets Tougher
By Anne Meixner - 07 Nov, 2023 - Comments: 0

DRAM manufacturers continue to demand cost-effective solutions for screening and process improvement amid growing concerns over defects and process variability, but meeting that demand is becoming much more difficult with the rollout of faster interfaces and multi-chip packages. DRAM plays a key role in a wide variety of electronic devices, from phones and PCs to ECUs in cars and servers ins... » read more

Rebalancing Test And Yield In IC Manufacturing
By Gregory Haley - 07 Nov, 2023 - Comments: 0

Balancing yield and test is essential to semiconductor manufacturing, but it's becoming harder to determine how much weight to give one versus the other as chips become more specialized for different applications. Yield focuses on maximizing the number of functional chips from a production batch, while test aims to ensure that each chip meets rigorous quality and performance standards. And w... » read more

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