scholarly journals Demystifying Unexpected Silicon Responses through User-Defined Fault Models (UDFM) and Failure Analysis

Author(s):  
Subhadip Kundu ◽  
Gaurav Bhargava ◽  
Lesly Endrinal ◽  
Lavakumar Ranganathan

Abstract Failure Analysis (FA) plays an important role during silicon development and yield ramp up, helping identify critical test, design marginality and process issues in a timely and efficient manner. FA techniques typically rely on diagnosis callouts as a starting point for debug. Diagnostic algorithms rely on the error logs collected on production patterns which are generated to detect Stuck-at Faults (SAF) and Transition Delay Faults (TDF). Typically, SAF patterns screen out the static defects and TDF patterns test for transient fails. But often, we see cases where a SAF pattern shmoo is clean but the TDF pattern shmoo is a gross failure indicating a cell-internal static defect missed by the traditional SAF patterns. In this work, we will present our own developed User-Defined Fault Model, which targets cell-internal faults to explain unexpected silicon observations. An added advantage of the work can be seen in improving diagnosis results on the error logs collected using these targeted UDFM patterns. Since UDFM utilizes targeted fault excitation, the diagnosis algorithm results in better callouts. In this paper, we will also propose a custom diagnosis flow using our in-house UDFM to achieve better resolution. Three FA case studies will be presented to showcase the usefulness and effectivity of the proposed methods.

Author(s):  
Dan Bodoh ◽  
Anthony Blakely ◽  
Terry Garyet

Abstract Since failure analysis (FA) tools originated in the design-for-test (DFT) realm, most have abstractions that reflect a designer's viewpoint. These abstractions prevent easy application of diagnosis results in the physical world of the FA lab. This article presents a fault diagnosis system, DFS/FA, which bridges the DFT and FA worlds. First, it describes the motivation for building DFS/FA and how it is an improvement over off-the-shelf tools and explains the DFS/FA building blocks on which the diagnosis tool depends. The article then discusses the diagnosis algorithm in detail and provides an overview of some of the supporting tools that make DFS/FA a complete solution for FA. It also presents a FA example where DFS/FA has been applied. The example demonstrates how the consideration of physical proximity improves the accuracy without sacrificing precision.


2021 ◽  
Vol 1 ◽  
pp. 881-890
Author(s):  
Michal Kozderka ◽  
Bertrand Rose

AbstractDuring the last three decades we observe growing use of ecodesign, but we observe also misuse of ecodesign methods, leading often to time and financial loss. In coherence with several failure analysis and with our observation, we base our work on a hypothesis: Misuse of ecodesign is often caused by lack of basic comprehension of environmental issues: Non linearity of the processes, their inertia and their excessive costs.Building on this hypothesis, we decided to enhance our education program with an innovative serious game. The goal is to achieve comprehension of the basic environmental issues. Innovation of the game lies in revealing to students at the end of the game, that the fictive initial situation of the game corresponded to a starting point of a real catastrophe. Students can thus not only compare their decisions with those of real leaders, but also to understand how and why bad decisions were taken.Experiments indicate that students who played the game tend to evaluate environmental problems, while those who followed a lecture tend to describe them. This trend (going further than to a description) seems to be useful in decision making and in deployment of ecodesign methods.


Geriatrics ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 29
Author(s):  
Kristina Marie Kokorelias ◽  
Einat Danieli ◽  
Sheila Dunn ◽  
Sid Feldman ◽  
David Patrick Ryan ◽  
...  

The number of family caregivers to individuals with dementia is increasing. Family physicians are often the first point of access to the health care system for individuals with dementia and their caregivers. Caregivers are at an increased risk of developing negative physical, cognitive and affective health problems themselves. Caregivers also describe having unmet needs to help them sustain care in the community. Family physicians are in a unique position to help support caregivers and individuals with dementia, but often struggle with keeping up with best practice dementia service knowledge. The Dementia Wellness Questionnaire was designed to serve as a starting point for discussions between caregivers and family physicians by empowering caregivers to communicate their needs and concerns and to enhance family physicians’ access to specific dementia support information. The DWQ aims to alert physicians of caregiver and patient needs. This pilot study aimed to explore the experiences of physicians and caregivers of people using the Questionnaire in two family medicine clinics in Ontario, Canada. Interviews with physicians and caregivers collected data on their experiences using the DWQ following a 10-month data gathering period. Data was analyzed using content analysis. Results indicated that family physicians may have an improved efficacy in managing dementia by having dementia care case specific guidelines integrated within electronic medical records. By having time-efficient access to tailored supports, family physicians can better address the needs of the caregiver–patient dyad and help support family caregivers in their caregiving role. Caregivers expressed that the Questionnaire helped them remember concerns to bring up with physicians, in order to receive help in a more efficient manner.


2014 ◽  
Vol 38 (3) ◽  
pp. 271 ◽  
Author(s):  
Anthony Bell ◽  
Alastair Cochrane ◽  
Sally Courtice ◽  
Kathy Flanigan ◽  
Mandeep Mathur ◽  
...  

Objective The aim of Queen Elizabeth II Jubilee Hospital (QEII) redesign project (QEII United) was to enhance timely access to an inpatient bed and maximise opportunities to value add during the inpatient episode of care. Methods A tripartite relationship between the hospital team, system manager and external consultants. The team, QEII United, was formed to ‘diagnose, solve and implement’ change under the unifying metaphorical banner of a football team. A marketing strategy and communication plan targeted the key ‘players’ and outlined the ‘game plan’. Baseline data were collected, analysed and reported in keeping with key aims. Strategies for systems improvement implementation were attached to key performance indicators (KPIs). Results Thematic KPIs were developed to embed internal process change to reflect the contributions made towards the National Emergency Access Target (NEAT) at each stage of the patient journey. As such, access block of under 20%, morning discharge rates of 50% before midday, reduced length of stay for selected elective orthopaedic and general medical diagnostic related groupings (DRGs; i.e. relative stay index ≤1) and hospital in the home (HITH) utilisation rates 1.5% of all admissions were all met. Key to sustainability was the transfer of clinical redesign skills to hospital staff and the fostering of emergent ground up leadership. Conclusions QEII United’s success has been underpinned by the development of themed solution areas developed by the hospital staff themselves. Robust baseline data analysis used in combination with nationally available benchmarking data provided a quantitative starting point for the work. The collaborative elements of the program re-energised the hospital team, who were kept informed by targeted communications, to establish quick wins and build trust and momentum for the more challenging areas. What is known about the topic? Clinical redesign is now commonly used to understand, define and improve those clinical processes that underpin the patient journey across the continuum of care. Different industry models exist and have been extended for use in healthcare settings to involve, engage and educate staff with the primary focus of providing the best possible patient care, in an effective and efficient manner. What does this paper add? The clinical redesign process outlined in this paper is instructive in its use of the metaphorical team. Team philosophy, composition and functionality was built up using the vernacular of a football competition. In this way, organisational learning and capability building occurred within empowered local action teams, across the ‘season’ to effect changes at all points of the patient journey. What are the implications for practitioners? The implications for practitioners are to fully understand the breadth of issues before deciding upon focus areas for improvement. Resistance to change is inevitable and there are a number of ways to mitigate this and create a sense of purpose within the broader clinical group by structuring teams across traditional reporting lines. Collaboration is crucial in keeping lines of communication open and the use of data and patient feedback is very instructive.


2021 ◽  
Vol 7 (12) ◽  
pp. 1028
Author(s):  
Silvia Donzella ◽  
Claudia Capusoni ◽  
Luisa Pellegrino ◽  
Concetta Compagno

The possibility to perform bioprocesses with reduced ecological footprint to produce natural compounds and catalyzers of industrial interest is pushing the research for salt tolerant microorganisms able to grow on seawater-based media and able to use a wide range of nutrients coming from waste. In this study we focused our attention on a Debaryomyces hansenii marine strain (Mo40). We optimized cultivation in a bioreactor at low pH on seawater-based media containing a mixture of sugars (glucose and xylose) and urea. Under these conditions the strain exhibited high growth rate and biomass yield. In addition, we characterized potential applications of this yeast biomass in food/feed industry. We show that Mo40 can produce a biomass containing 45% proteins and 20% lipids. This strain is also able to degrade phytic acid by a cell-bound phytase activity. These features represent an appealing starting point for obtaining D. hansenii biomass in a cheap and environmentally friendly way, and for potential use as an additive or to replace unsustainable ingredients in the feed or food industries, as this species is included in the QPS EFSA list (Quality Presumption as Safe—European Food Safety Authority).


2012 ◽  
Vol 182-183 ◽  
pp. 1265-1269
Author(s):  
Zu Ming Xu ◽  
Xiong Fu

Wireless sensor networks require energy-efficient and robust routingprotocols. Most routing protocols for sensor networks try to extendnetwork lifetime by minimizing the energy consumption, but have not taken the network reliability into account. In this paper, we analyze the fault models and propose an ENergy-aware FAult-tolerantRouting scheme, termed as ENFAR. Firstly a link-based uniform fault model is presented, and we adopt a cross-layer design to measurethe transmission delay so as to detect the failed nodes.


1992 ◽  
Vol 9 (1) ◽  
pp. 72-83 ◽  
Author(s):  
A. Pancholy ◽  
J. Rajski ◽  
L.J. McNaughton

2018 ◽  
Vol 15 (1) ◽  
pp. 237-256
Author(s):  
Eduardas Bareisa ◽  
Vacius Jusas ◽  
Kestutis Motiejunas ◽  
Liudas Motiejunas ◽  
Rimantas Seinauskas

We presented nine new black box delay fault models for non-scan sequential circuits at the functional level, when the primary inputs and primary outputs are available only. We examined the suggested fault models in two stages. During the first stage of the experiment, we selected the best two fault models for further examination on the base of criterion proposed in the paper. During the second stage, we used the functional delay fault model and two black box delay fault models from the first stage for test selection. The comparison of fault coverages was carried out for transition faults. The obtained results demonstrate that transition fault coverages of tests selected based on proposed black box fault models are similar to coverages of tests selected based on functional delay fault model that uses the inner state of circuit.


Sign in / Sign up

Export Citation Format

Share Document