Failure Analysis Strategy for 2 Stacked Die CSP

2002 ◽  
Author(s):  
Shamsul Mohamed ◽  
Caroline Francis ◽  
Rodzaki Saad ◽  
Rosli Jaffar
Keyword(s):  
Failure Analysis ◽  
Time Frame ◽  
Corrective Action ◽  
Limited Time ◽  
Packaging Technology ◽  
Electrical Isolation ◽  
Analysis Strategy ◽  
New Challenges ◽  
Manufacturing Yield ◽  
Electrical Connectivity

Abstract Multi chip packages provide higher functionality in a module using multiplicity of dice. One specific packaging technology known as Stacked Chip-Scale Packaging raises new challenges for the failure analysis community. A methodology to perform full electrical isolation and failure analysis without damaging the electrical connectivity on either package or any of the dies in a stacked 2-die package is described. A second challenge is to obtain analysis result in a limited time frame in order to improve manufacturing yield and perform corrective action effectively. Example of successful failure analysis following this methodology on units with failure in packaging unit and units in failure in the die are presented.

Efficient and Effective Failure Analysis of Low-Resistive Defect in Logic Device Using Layout-aware and Volume Diagnosis

2018 ◽  
Author(s):  
Ho Seok Song ◽  
Eun Ji Park ◽  
Tae Hwan Kim ◽  
Dong Hae Kang ◽  
Jong Taek Hong ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Induced Resistance ◽  
Logic Device ◽  
Electrical Isolation ◽  
Turn Around Time

Abstract Efficient and effective failure analysis (FA) of low-resistive defect was studied by using layout-aware and volume diagnosis. Small or marginal defect is one of the most difficult defectivities to identify during FA effort, especially if defect-induced resistance is not as high as the electrical isolation can detect. Here, we used new analysis methodologies, particularly using layout-aware and volume diagnosis, and prioritizing patterns in terms of a defective risk for following FA. The actual FA work verified that new analysis methodologies successfully identified low-resistive defect of Back-End-of-Line (BEOL) which was not detected by a conventional way and efficiently reduced the turn-around time (TAT) of physical failure analysis (PFA) by 57%, prompting fast feedback to fab.

SRAM Failure Analysis Strategy

2003 ◽  
Author(s):  
P. Egger ◽  
C. Burmer
Keyword(s):  
Liquid Crystal ◽  
Failure Analysis ◽  
The Other ◽  
Other Hand ◽  
Analysis Strategy ◽  
Emission Microscopy ◽  
Metal Layers ◽  
Failure Localization

Abstract The area of embedded SRAMs in advanced logic ICs is increasing more and more. On the other hand smaller structure sizes and an increasing number of metal layers make conventional failure localization by using emission microscopy or liquid crystal inefficient. In this paper a SRAM failure analysis strategy will be presented independent on layout and technology.

Current Approaches in Teacher Learning on Digital Social Platforms

2021 ◽  
pp. 624-641
Author(s):  
Emily Southerton ◽  
Victor R. Lee
Keyword(s):  
Teacher Learning ◽  
Online Teaching ◽  
Ongoing Study ◽  
Limited Time ◽  
Brute Force ◽  
New Challenges

Within digital ecologies, teachers routinely find an abundance of information related to their teaching. While many teachers pursue brute force searches for online ideas and resources, during the COVID-19 pandemic, teachers had to address pressing new challenges in online teaching in the most efficient ways possible. This chapter reports on an ongoing study of 16 teachers and how they relied upon digital social platforms to make the move to online teaching. Analysis revolves around socially-distanced video-recorded interviews with these teachers. Given their limited time, teachers had to be selective about what they deemed useful and relevant to their immediate needs. Strategic uses of digital social platforms served to address some of those needs. Specific strategies observed in the data regarding the development of pedagogy included joining teacher collectives, accessing expert-like spaces, and finding pedagogical inspiration within posts by teacher-influencers.

scholarly journals Letter on Predicting the number of sites needed to deliver a multicentre clinical trial within a limited time frame in the UK

Trials ◽  
2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Rosemary Greenwood ◽  
Julie Pell ◽  
Paula Foscarini-Craggs ◽  
Katharine Wale ◽  
Ian Thomas ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Sample Size ◽  
Cost Effective ◽  
Fixed Time ◽  
Time Frame ◽  
Recruitment Rate ◽  
Limited Time ◽  
Multicentre Clinical Trial ◽  
Ethical Approval ◽  
The Uk

Abstract When planning a multicentre clinical trial, it can be difficult to predict the time needed to open individual sites, and this in turn impacts on the total number of sites needed, the budget and the time frame for a clinical trial to be delivered successfully. This is of particular importance for funding applications with a limited time frame and budget such as NIHR RfPB. It is more efficient and cost-effective to open the total number of sites needed at the outset of a trial, rather than to respond later to slow site opening and recruitment. Here, we share our experience of successfully delivering a multicentre clinical trial for a rare disease within a limited time frame and budget by approximately doubling the number of sites initially predicted to be needed. We initially predicted 20 sites would be needed to deliver the clinical trial, but early on in the trial, the number of sites was more than doubled to allow successful recruitment of the target sample size within the desired time frame. Of the 48 ethically approved sites, the median time from ethical approval of a site to opening for recruitment was 182 days (95% confidence interval [143 to 245 days]) and ranged from 18 to 613 days. In four (9%) of these sites, part of the delay was due to pharmacy sign off not being given when R&D had issued capacity and capability (C&C). Delays due to pharmacy sign off varied from 10 days to over 3 months delay in two sites (94 days and 102 days). A mathematical solution to the problem of planning a study with a short recruitment window has been given to support the planning and costing of grants with fixed time constraints: number of sites = required sample size divided by (number of eligible patients per site per month times recruitment rate times (the number of months accrual minus 6 months)). We expect these results to help others who are planning multicentre clinical trials in the UK. Ethical approval from NRES Committee South West (IRAS number 225959). Trial registration EudraCT Number 2017-001171-23. Registered on 26 June 2017

scholarly journals Very brief dynamic psychotherapy

2001 ◽  
Vol 7 (5) ◽  
pp. 373-380 ◽  
Author(s):  
Mark Aveline
Keyword(s):  
Randomised Controlled Trial ◽  
Controlled Trial ◽  
Time Frame ◽  
Limited Time ◽  
Brief Psychotherapy ◽  
Single Session ◽  
Dynamic Psychotherapy ◽  
Maximum Benefit ◽  
Randomised Controlled ◽  
Therapeutic Task

The practice of brief psychotherapy is a distillate of the active ingredients in longer-term work but with the addition of two special elements: limited time and therapist activity in formulating a focus and focusing on it. Typically, patient and therapist work together over 10 to 25 sessions in weekly meetings. In very brief dynamic psychotherapy (VBDT), the time frame is shrunk to fewer than 10 sessions, sometimes just a single session; the constraint means that there is less room for corrective manoeuvre in order to achieve the therapeutic task of maximum benefit and minimum harm in the time available. To do this well requires knowledge, skill and sensitivity. In this paper, special attention is paid to a ‘three-plusone’ intervention (brief intervention and followup (BRF)) that has been tested in a randomised controlled trial (RCT).

scholarly journals Tools for Shaping Stories? Visual Plot Models in a Sample of Anglo-American Advice Handbooks

2020 ◽  
pp. 171-198
Author(s):  
Liorah Hoek
Keyword(s):  
Creative Writing ◽  
Linear Models ◽  
Time Frame ◽  
Hero's Journey ◽  
Limited Time ◽  
Polar Model ◽  
Dramatic Writing ◽  
Anglo American

AbstractThis chapter examines the “storyology” in writing manuals, focusing on the verbal and the visual plot models in a corpus of sixteen mainstream creative writing handbooks on plot, novels, and screenplays, still in use today. We will focus on the prevalence of dramatic writing and the predominance of the “Mountain Model,” a model which combines earlier linear models, such as the “three-act structure,” “Field’s paradigm,” “Fichtean Curve,” “Freytag’s Pyramid,” and the polar model, built on the alternation of good and bad fortune, along with Joseph Campbell’s “Hero’s Journey.” The Mountain Model visualizes a concept of writing particularly suited for stories capable of being resolved within a limited time frame, combining the perspectives of protagonist and reader. While this model is usually presented as ideal and universal, changing the representation from a linear to a topographical model alters the kinds of plots which can be imagined.

Strategies to Address Low DPPM Failure Mechanisms on Automotive Grade Wi-Fi Radio Frequency Devices

2015 ◽  
Author(s):  
Kai Wang ◽  
Sadia Lone ◽  
Colin Thomas ◽  
Rhys Weaver
Keyword(s):  
Failure Analysis ◽  
Continuous Improvement ◽  
Failure Mechanisms ◽  
Time Frame ◽  
Cause Analysis ◽  
Automotive Market ◽  
Root Cause ◽  
Rigorous Testing ◽  
Additional Demand

Abstract System suppliers in the automotive market have an expectation that their IC suppliers provide products with low defective parts per million (DPPM) and have methodologies in place to drive towards 0ppm (Zero Parts Per Million). IC suppliers to the automotive market have supply chains and test methodologies in place to achieve such low DPPMs, but the systems suppliers will still require root cause analysis on every failure. The IC supplier is expected to demonstrate a containment, corrective action and continuous improvement in a very tight time frame. This additional demand of automotive customers poses a challenge to the quality of IC devices and the concept of cross departmental failure analysis. In this paper, we look at a complex Wi-Fi design with multiple IEEE specific radios, and how to address the few parts that escape the rigorous testing by IC supplier to improve the quality for the automotive IC.

130nm Backend Reliability Failures—Analysis to Corrective Action

2006 ◽  
Author(s):  
Gil Garteiz ◽  
Amir Zylberman
Keyword(s):  
Failure Analysis ◽  
Failure Mechanism ◽  
Corrective Action ◽  
Problem Identification ◽  
Corrective Actions

Abstract Tower successfully completed a product qualification of its 130nm copper process this year. The key to this achievement was finding and eliminating a dominant failure mechanism, which appeared during HTOL stress. This paper will cover the failure analysis, in-line problem identification, and corrective actions taken that eventually lead to successful product qualification.

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