Fault Localization by Finding Schematic of Devices Connecting All Emission Sites in Photon Emission Microscope Image

2017 ◽  
Author(s):  
Ankush Oberai ◽  
Jiann-Shiun Yuan
Keyword(s):  
Failure Analysis ◽  
Computer Aided Design ◽  
Critical Path ◽  
Photon Emission ◽  
Fault Localization ◽  
Microscope Image ◽  
Transmission Gates ◽  
The One ◽  
Switching Mode ◽  
Aided Design

Abstract The work presented here is related to the utilization of computer aided design (CAD) Navigation tools in combination with images from Emission Microscope (EMMI) to improve the accuracy and efficiency of Failure Analysis. The paper presents the flow to quickly identify the failing device by taking the photon emission microscope image and CAD data as input. EMMI is used extensively for detecting leakage current resulting from device defects, e.g., gate oxide defects/ leakage, latch-up, electrostatic discharge (ESD) failure, junction leakage, etc. This emitted light is captured as hotspots on the image. A typical photon emission microscope image has a series of photon emission spots initiated by one physical defect. Not all emission spots may be defects; for example, emissions are shown during normal saturation or switching mode of the transistor. This results in multiple connectivity path between these spots which failure analysis (FA) engineer may want to analyze. The FA engineer wants to detect the one failed device which causes multiple other devices to show false hotspots. The work presented in this paper involves identifying all the devices beneath the hotspot areas, processing the connectivity of the found devices and extracting the schematic for all the devices beneath these hotspots. The connectivity between the devices could be direct connections through nets or indirect through “transmission gates”. The extracted schematic helps the FA engineer focus the FA work on critical devices such as a driver and enables faster and more accurate fault localization. The work in the paper shows the extraction of critical path of devices and their connectivity.

scholarly journals Simulation Study of a Composite Landig Gear of Ultralight and Very Light Aircraft

2021 ◽  
Author(s):  
Paulina Zenowicz
Keyword(s):  
Simulation Study ◽  
Computer Aided Design ◽  
Landing Gear ◽  
Design Tool ◽  
Drop Test ◽  
Environment Design ◽  
Element Analysis ◽  
Computer Methods ◽  
The One ◽  
Aided Design

There is a need to design new, lighter aircraft structures, which has a direct impact on the safety and costs of aircraft maintenance. One of basic parts of an aircraft is ites landing gear, whose main functions are to enable taxiing, safe landing, take-off, and to assist the remainder of ground operations. Landing gear failures are usually related to metallurgy, processing, environment, design, and causes of overload. These are conditions that can be prevented using modern methods to calculate the strength of such a landing gear in various conditions. The paper presents stages of a simulation study of the fixed three-wheeled spring landing gear for an ultralight aircraft. Analysis of forces acting on the landing gear during drop test and their implementation by numerical computer methods allowed for the creation of a model in the CAD (Computer-Aided Design) tool and its FEA (Finite Element Analysis). These results were compared between a modeled classic spring landing gear and the one made of composite materials. The further goal of the research will be to build a drop test stand for a small landing gear used in airplanes and drones. This method has a significant impact on simplifying the design of the landing gear, its modeling, and optimization.

scholarly journals Anatomical Shaping for Zirconia Custom Implant Abutment to Enhance Anterior Esthetic: A Clinical Technique

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Mohammed Alshehri ◽  
Mohammed Alghamdi ◽  
Abdullah S. Alayad
Keyword(s):  
Computer Aided Design ◽  
Innovative Technology ◽  
Dental Crowns ◽  
Incisal Edge ◽  
Custom Implant ◽  
Optical Effects ◽  
Computer Aided ◽  
Cad Cam ◽  
The One ◽  
Aided Design

Abutments are used in dentistry to attach dental crowns to dental implant. Currently, zirconia custom abutment is the one which is mostly used in restorations, since it offers several advantages, especially better esthetics and prevention from infection. Several innovations are done in the implant designs and procedures to achieve better esthetics. Computer-aided design & computer-aided manufacturing (CAD/CAM) system is widely used innovative technology in dentistry. This technology offers custom implants that help to achieve better esthetics and good internal fit. This procedure used a novel technique of anatomical modification of the final abutment incisal edge from straight anatomical edge to irregular one with a mamelon-incisal effect to enhance esthetic, shade matching, and anatomical replication of incisal structure that resembles the natural incisor. Usually, dental technicians will perform facial and incisal cut-back and apply porcelain layers to the crown in order to reproduce the translucency and the other optical effects that most closely match that of natural dentin and enamel, especially at the incisal edge. These optical effects will make the prosthetic crown look more natural and esthetically pleasant. By this presented technique will help the dental technician to achieve highly esthetic crown with completely digital workflow without the need for porcelain layering. The procedure was also followed up to 3, 6, and 12 months after the surgery and found no complications or complaints from the patient and esthetically satisfied.

Implementation of computer-aided design systems (CAD) in a machine-building enterprise: limitations and opportunities

2020 ◽  
pp. 53-60
Author(s):  
E.V. Krukhmalev ◽  
◽  
V.V. Panchuk ◽  
Keyword(s):  
Production Process ◽  
Computer Aided Design ◽  
World Market ◽  
Machine Building ◽  
Software Products ◽  
Modern Engineering ◽  
Computer Aided ◽  
State Of The Economy ◽  
The One ◽  
Aided Design

The article highlights issues related to factors that affect the introduction of computer-aided design (CAD) systems in modern machine-building industries. The purpose of the work is to determine the main limitations and possibilities of using CAD in production and to consider the main trends in the development of system solutions for mechanical engineering problems. The theoretical basis of the work is data analysis and analytical study of the current state of proposals for CAD solutions. Electronic modeling systems allow not only to optimize the production process, reduce costs, but also are indispensable requirements for the competitiveness of modern engineering products on the world market. They allow you to carry out operational, remote interaction on the development and production of products, bringing it to the international market. Despite the variety of possibilities offered by CAD solutions from various companies and vendors, the request for its implementation by enterprises is very limited. The crisis state of the economy and industrial production is also not an incentive to implement such solutions. In this regard, it is necessary, on the one hand, to study in detail the evaluation of the effectiveness of implementing CAD technologies, and on the other hand - the most flexible software products that are adapted to the real capabilities and requirements of a particular enterprise, production process, and final product.

Fast and Accurate Fault Localization Through Effective Use of Design Schematics

2019 ◽  
Author(s):  
Ankush Oberai ◽  
Rupa Kamoji ◽  
Arpan Bhattacherjee
Keyword(s):  
Integrated Circuit ◽  
Computer Aided Design ◽  
Fault Localization ◽  
Ic Design ◽  
Design Data ◽  
Root Cause ◽  
Effective Use ◽  
Aided Design ◽  
Improved Accuracy ◽  
Physical Layout

Abstract In modern-day semiconductor failure analysis (FA), the need for computer-aided design (CAD) has extended beyond the sole physical layout to a much larger scope of integrated circuit (IC) design data, such as the source schematic and netlist. Due to the improved accuracy of predicted failures reported by test and diagnosis tools, it has become virtually mandatory to correlate the potential failing schematic features (e.g., nets and instances) to their corresponding location on the physical-CAD layout and actual device under test (DUT). This paper covers the latest advancements of utilizing IC design schematics for fast and accurate fault localization; along with some of the most-effective methodologies for efficient root-cause analysis.

Verification of DLS Data by LVP in Case of Marginal Failure

2016 ◽  
Author(s):  
Keonil Kim ◽  
Sungjin Kim ◽  
Kunjae Lee ◽  
Kyeongju Jin ◽  
Yunwoo Lee ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Failure Mechanism ◽  
Fault Location ◽  
Photon Emission ◽  
Fault Localization ◽  
Fault Isolation ◽  
The Real ◽  
Defect Isolation ◽  
The Relationship ◽  
Non Destructive

Abstract In most of the non-destructive electrical fault isolation cases, techniques such as DLS, Photon Emission, LIT, OBIRCH indicate a fault location directly. But relying on just one of these techniques for marginal failure mechanism is not enough for better fault localization. When Failure Analysis (FA) engineers encounter high NDF (No Defect Found) rates, by using only one of the techniques, they may need to consider the relationship between the responded locations by different techniques and fail phenomenon for better defect isolation. This paper talks about how a responded DLS location does not always indicate a fault location and how LVP data collected using DLS location can pin point the real defect location.

Issues of Similarity in Engineering Design

2006 ◽  
Author(s):  
Srinivasan Anandan ◽  
Sudhakar Teegavarapu ◽  
Joshua D. Summers
Keyword(s):  
Engineering Design ◽  
Computer Aided Design ◽  
Design Problems ◽  
Design Models ◽  
Process Plans ◽  
Engineering Design Problems ◽  
Computer Aided ◽  
Design Requirements ◽  
The One ◽  
Aided Design

A useful way to generate solutions to engineering design problems is to compare the solutions of design problems similar to the one at hand and validate the solutions to satisfy the new design requirements. This process involves evaluating the similarity between the design problem at hand and the various design problems in the repository. The purpose of this paper is to investigate the meaning and the use of similarity in engineering design. Various similarity theories in literature have been explored. Previous applications of these theories are limited to the retrieval of similar computer-aided design models and process plans. This paper extends the applications of these theories to the various stages of the design process.

scholarly journals A Four-Inflow Construction to Ensure Thermal Stability and Uniformity during Hyperthermic Intraperitoneal Chemotherapy (HIPEC) in Rats

Cancers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3516
Author(s):  
Daan R. Löke ◽  
Roxan F. C. P. A. Helderman ◽  
Jan Sijbrands ◽  
Hans M. Rodermond ◽  
Pieter J. Tanis ◽  
...  
Keyword(s):  
Intraperitoneal Chemotherapy ◽  
Computer Aided Design ◽  
Hyperthermic Intraperitoneal Chemotherapy ◽  
In Vivo Experiments ◽  
The One ◽  
Aided Design ◽  
The Impact ◽  
Phosphate Buffered Saline

Background: Hyperthermic intraperitoneal chemotherapy (HIPEC) after cytoreductive surgery (CRS) is used for treating peritoneal metastases of various origins. Present HIPEC protocols have rarely been validated for relevant parameters such as optimal agent, duration and perfusate temperature. In vitro experiments are not completely representative of clinical circumstances. Therefore, a good preclinical in vivo HIPEC model is needed in which temperature distributions can be well-controlled and are stable throughout treatments. Methods: We designed a setup able to generate and maintain a homogeneous flow during a 90-min HIPEC procedure using our in-house developed treatment planning tools and computer aided design (CAD) techniques. Twelve rats were treated with heated phosphate-buffered saline (PBS) using two catheter setups (one vs. four- inflows) and extensive thermometry. Simulated and measured thermal distribution and core temperatures were evaluated for the different setups. Results: Overall, the four-inflow resulted in more stable and more homogeneous thermal distributions than the one-inflow, with lower standard deviations (0.79 °C vs. 1.41 °C at the outflow, respectively) and less thermal losses. The average thermal loss was 0.4 °C lower for rats treated with the four-inflow setup. Rat core temperatures were kept stable using occasional tail cooling, and rarely exceeded 39 °C. Conclusion: Increasing the number of inflow catheters from one to four resulted in increased flow and temperature homogeneity and stability. Tail cooling is an adequate technique to prevent rats from overheating during 90-min treatments. This validated design can improve accuracy in future in vivo experiments investigating the impact of relevant parameters on the efficacy of different HIPEC protocols.

scholarly journals Heterogeneous Industry Collaboration and System CAD Navigation for Advanced Package Failure Analysis

2021 ◽  
Author(s):  
Arpan Bhattacherjee ◽  
Anand Shankar ◽  
Arshdeep Singh ◽  
Mehak Singla
Keyword(s):  
Failure Analysis ◽  
Computer Aided Design ◽  
Consumer Electronics ◽  
Sensitive Information ◽  
Security Measures ◽  
Time To Market ◽  
Multiple Components ◽  
Industry Collaboration ◽  
New Challenges ◽  
Aided Design

Abstract The emergence of Heterogenous Integration (HI) in today's wave of systems-in-package (SiP) has not only increased the complexity of semiconductor Failure Analysis (FA), but also introduced new challenges that go beyond the traditional FA lab, into market verticals such as Assembly and Test. Today's market requires semiconductor companies to collaborate with these verticals to efficiently debug failures in advanced package devices. In this increasingly collaborative industry, FA engineers struggle to maintain adequate security of their company's intellectual property (IP) while sharing design information that is required for effective fault localization of SiP products. On top of these growing complications, increased commercial competition and the drastic rise in the demand for consumer electronics has made time-to-market (TTM) the top priority for all global chip makers. To address these challenges, companies strive for ways to integrate various design sources into a normalized and controllable Computer-Aided Design (CAD) database that can be seamlessly navigated across multiple components without exposing sensitive information. This paper covers an approach to enhance the efficiency of advanced package FA by integrating a full heterogeneous system into a single CAD Navigation (CADNav) database with added security measures to enable data sharing for industry-wide collaboration.

scholarly journals Comparison of virtual and physical dimensions in AM resin dental devices and fit of devices with conventionally produced base plates

2018 ◽  
Vol 24 (1) ◽  
pp. 188-194
Author(s):  
Noor Abdullah Al Mortadi ◽  
Dominic Eggbeer ◽  
Jeffrey Lewis ◽  
Robert Williams
Keyword(s):  
Computer Aided Design ◽  
Base Plate ◽  
Additive Manufacture ◽  
Content Type ◽  
Dental Appliance ◽  
The One ◽  
Aided Design ◽  
Spatial Locations ◽  
Base Plates ◽  
Plate Type

Purpose The purpose of this study is to develop and apply clinically relevant methods of analysing the accuracy of dental appliances fabricated using additive manufacture (AM) compared to the computer-aided design (CAD) geometry. The study also compared fit between conventionally laboratory-fabricated and AM-produced base plates. Design/methodology/approach The techniques were applied to two types of dental devices where AM fabrication methods could foreseeably be used as an alternative to laboratory production. “L” and cubic shapes of defined dimensions and spatial locations were positioned on the devices which were fabricated using AM. For assessing the dimensions, the “L” and cubic shapes were then measured on the physical builds ten times and compared to the CAD model. To assess the fit of AM and lab-produced devices, three upper and three lower conventionally fabricated acrylic base plates were compared to three upper and three lower plates. Silicone impression material was allowed to set between the casts and the base plates which filled any discrepancy between the two surfaces. The thickness of this silicone media was measured ten times at five different points on each base plate type and the results compared. Findings The results indicated that the evaluated CAD/AM technique is able to produce dental appliance components that are consistent with tolerance levels that would be expected with conventional methods of baseplate design. This research demonstrated that a fully CAD/AM methodology represents a potentially viable alternative to conventional lab-based methods for two types of dental appliances. Originality/value This work is original. The authors do not believe any previous papers similar to the one submitted have been published.

scholarly journals Geometric conditions for injectivity of 3D Bézier volumes

2021 ◽  
Vol 6 (11) ◽  
pp. 11974-11988
Author(s):  
Xuanyi Zhao ◽  
◽  
Jinggai Li ◽  
Shiqi He ◽  
Chungang Zhu ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Point Of View ◽  
Control Points ◽  
Positive Weight ◽  
Geometric Conditions ◽  
Geometric Point ◽  
Wide Range ◽  
The One ◽  
Deformation Models ◽  
Aided Design

<abstract><p>The one-to-one property of injectivity is a crucial concept in computer-aided design, geometry, and graphics. The injectivity of curves (or surfaces or volumes) means that there is no self-intersection in the curves (or surfaces or volumes) and their images or deformation models. Bézier volumes are a special class of Bézier polytope in which the lattice polytope equals $ \Box_{m, n, l}, (m, n, l\in Z) $. Piecewise 3D Bézier volumes have a wide range of applications in deformation models, such as for face mesh deformation. The injectivity of 3D Bézier volumes means that there is no self-intersection. In this paper, we consider the injectivity conditions of 3D Bézier volumes from a geometric point of view. We prove that a 3D Bézier volume is injective for any positive weight if and only if its control points set is compatible. An algorithm for checking the injectivity of 3D Bézier volumes is proposed, and several explicit examples are presented.</p></abstract>

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