Active Voltage Contrast for Failure Localization in Test Structures

2006 ◽  
Author(s):  
R. Rosenkranz ◽  
S. Döring ◽  
W. Werner ◽  
L. Bartholomäus ◽  
S. Eckl
Keyword(s):  
Case Studies ◽  
Leakage Currents ◽  
Open Part ◽  
Localization Method ◽  
The Common ◽  
Voltage Contrast ◽  
Failure Localization

Abstract The common Passive Voltage Contrast (VC) localization method has its limits in the case of substrate contact chains. Because of leakage currents it is not possible to charge up the open part of the chain. In two case studies it is shown, how the Active Voltage Contrast (AVC) method in FIB and SEM can help to localize faults in such structures.

Comparison of Active and Passive Voltage Contrast for Failure Localization

2007 ◽  
Author(s):  
R. Rosenkranz ◽  
W. Werner
Keyword(s):  
Case Studies ◽  
Optical Beam ◽  
Leakage Currents ◽  
Localization Method ◽  
Voltage Contrast ◽  
Failure Localization

Abstract In many cases of failure localization, passive voltage contrast (PVC) localization method does not work, because it is not possible to charge up conducting structures which supposed to be dark in the SEM and FIB images. The reason for this is leakage currents. In this article, the authors show how they succeeded in overcoming these difficulties by the application of the active voltage contrast (AVC) method as it was described as biased voltage contrast by Campbell and Soden. They identified three main cases where the PVC didn't work but where they succeeded in failure localization with the AVC method. This is illustrated with the use of two case studies. Compared to the optical beam based methods the resolution is much better so a single failing contact of e.g. 70 nm technology can clearly be identified which cannot be done by TIVA or OBIRCH.

Application of KOH Electrochemical Etch and Passive Voltage Contrast Techniques for Deep Sub-Micron CMOS Leaky Gate Detection

2000 ◽  
Author(s):  
Fred Y. Chang ◽  
Victer Chan
Keyword(s):  
Case Studies ◽  
Detection Technique ◽  
Cobalt Silicide ◽  
Process Technology ◽  
Process Flow ◽  
Voltage Contrast ◽  
Emission Detection ◽  
Wet Etch ◽  
Direct Confirmation

Abstract This paper describes a novel de-process flow by combining cobalt silicide / nitride wet etch with KOH electrochemical wet etch (ECW) to identify leaky gate in silicided deep sub-micron process technology. Traditionally, leaky gate identification requires direct confirmation by gate level electrical or emission detection technique. Ohtani [1] used KOH electrochemical etch application to identify nonsilicided leaky gate capacitor in DRAM without using the above confirmation. The result of the case study demonstrates the expanded application of ECW etch to both silicided 0.18um logic and SRAM devices. Voltage contrast at metal 1 to assist leaky gate localization is also proposed. By combining both techniques, the possibility for isolating gate related defects are greatly enhanced. Case studies also show the advantages of the proposed technique over conventional poly level voltage contrast in leaky gate identification especially with devices that use local interconnect and nitride liner process.

Analysis of Voltage Contrast in Secondary Electron Images Using a High-Energy Electron Spectrometer

2019 ◽  
Author(s):  
Natsuko Asano ◽  
Shunsuke Asahina ◽  
Natasha Erdman
Keyword(s):  
Focused Ion Beam ◽  
Ion Beam ◽  
Sample Surface ◽  
High Energy ◽  
Secondary Electrons ◽  
Analysis Technique ◽  
Quantitative Understanding ◽  
Voltage Contrast ◽  
Acceleration Voltage ◽  
Failure Localization

Abstract Voltage contrast (VC) observation using a scanning electron microscope (SEM) or a focused ion beam (FIB) is a common failure analysis technique for semiconductor devices.[1] The VC information allows understanding of failure localization issues. In general, VC images are acquired using secondary electrons (SEs) from a sample surface at an acceleration voltage of 0.8–2.0 kV in SEM. In this study, we aimed to find an optimized electron energy range for VC acquisition using Auger electron spectroscopy (AES) for quantitative understanding.

Process Induced Defects in the Silicon Substrate: Approaches for Successful Failure Analysis

2010 ◽  
Author(s):  
J.G. van Hassel ◽  
Xiao-Mei Zhang
Keyword(s):  
Failure Analysis ◽  
Case Studies ◽  
Silicon Substrate ◽  
Processing Technique ◽  
Electrical Characteristics ◽  
Localization Method ◽  
The Right ◽  
Induced Defects

Abstract Failures induced in the silicon substrate by process marginalities or process mistakes need continuous attention in new as well as established technologies. Several case studies showing implant related defects and dislocations in silicon will be discussed. Depending on the electrical characteristics of the failure the localization method has to be chosen. The emphasis of the discussion will be on the importance of the right choice for further physical de-processing to reveal the defect. This paper focuses on the localization method, the de- processing technique and the use of Wright etch for subsequent TEM preparation.

Medicines management for nursing practice

2013 ◽  
Author(s):  
Graham Brack ◽  
Penny Franklin ◽  
Jill Caldwell
Keyword(s):  
Patient Safety ◽  
Case Studies ◽  
Nursing Practice ◽  
Medicines Management ◽  
Knowledge And Skills ◽  
Practical Advice ◽  
Patient Centred Care ◽  
The Common ◽  
Skills Learning ◽  
Straightforward Approach

Medicines Management for Nursing Practice: Pharmacology, Patient Safety, and Procedures is a friendly guide designed to equip pre-registration and newly qualified nurses with the medicines management knowledge and skills to provide safe patient-centred care. Balancing theory with practical advice, this accessible text covers basic pharmacology, drug calculations, key legislation and standards, and patient safety. Drawing from the most up-to-date sources of evidence and advice, including NMC and BNF guidelines, Medicines Management for Nursing Practice prepares nurses to promote their patients' safety, concordance, understanding of medicines, and wellbeing. This book takes a lively and straightforward approach to a vital set of nursing skills. Learning features such as reflection points, exercises, and further reading help readers to develop and consolidate their knowledge. Chapters on pharmacology and drug calculations take a step-by-step approach and are supported by diagrams and examples to aid understanding. Case studies relate guidelines and theories to the common practical scenarios that nurses encounter on a day-to-day basis.

'The Proof is on My Palm': Debating Ethnicity, Islam and Ritual in a New African Diaspora

2006 ◽  
Vol 36 (1) ◽  
pp. 50-77 ◽  
Author(s):  
Michelle Johnson
Keyword(s):  
Life Course ◽  
Ethnic Group ◽  
Case Studies ◽  
African Diaspora ◽  
Religious Identity ◽  
Muslim Identity ◽  
World Religion ◽  
Guinea Bissau ◽  
The World ◽  
The Common

AbstractFor Mandinga in Guinea-Bissau and Portugal, life-course rituals are currently provoking transnational debates on ethnic and religious identity. In Guinea-Bissau, these two identities are thought to be one and the same—to be Mandinga is to 'naturally' be Muslim. For Mandinga immigrants in Portugal, however, the experience of transnationalism and the allure of 'global Islam' have thrust this long-held notion into debate. In this article, I explore the contours and consequences of this debate by focusing on the 'writing-on-the-hand' ritual, which initiates Mandinga children into Qur'anic study. Whereas some Mandinga immigrants in Portugal view the writing-on-the-hand ritual as essential for conferring both Muslim identity and 'Mandinga-ness', others feel that this Mandinga 'custom' should be abandoned for a more orthodox version of Islam. Case studies reveal an internal debate about Mandinga ethnicity, Islam and ritual, one that transcends the common 'traditionalist'/'modernist' distinction. I suggest that the internal debate, although intensified by migration, is not itself a consequence of 'modernity' but has long been central to how Mandinga imagine themselves as both members of a distinct ethnic group and as practitioners of the world religion of Islam.

Removing the Nationality Paradigm from Herodotus’ Histories

2018 ◽  
Vol 10 (2) ◽  
pp. 306-323
Author(s):  
Salvatore Tufano
Keyword(s):  
Case Studies ◽  
Final Section ◽  
Fifth Century ◽  
Test Cases ◽  
Persian Wars ◽  
Classical Definition ◽  
Mixed Language ◽  
Archaic Greece ◽  
The Common ◽  
Definition Of

Abstract The present paper suggests that the recurring appeal to kinship diplomacy undermines a fixed idea of ‘nation’ in Archaic Greece, especially in the first two decades of the fifth century BC. It aims to present a series of test cases in Herodotus that explain why contemporary patterns and theories on ancient ethnicity can hardly explain the totality of the historical spectrum. Blood ties could sometimes fortify ethnic relationships, as in the case of Aristagoras’ mission to Sparta (Hdt. 5.49.3), since the common Greekness could elicit the Spartan to help to the Ionians. In other times, the same blood ties were applied to divine genealogies, and they could also be used to show the feeble devotion of cities like Argos to the Greek cause (7.150.2: Xerxes expects the Argives to join the Persian cause, since they descend from Perses). Habits and traditions, often taken as indicia of national feeling, could be thought of as clues of ancient migrations (so the Trojans became Maxyes in Lybia: 4.191). Even language might not help in justifying ethnic relationships: for instance, the Greeks living in the Scythian Gelonus spoke a mixed language (4.108). These few case studies may shed a different light on the classical definition of Greekness (to hellenikon) in terms of blood, language, cults, and habits, all given by Herodotus (8.144). Far from being a valid label for all the Greeks of the fifth century, this statement owes much to a specific variety of the language of kinship diplomacy. The final section argues for the opportunity to avoid the later and misleading idea of nation when studying Herodotus and the age of the Persian Wars, which are instead characterized by various and contrasting strategies. Greek groups and ethne can be better described as networks of lightly defined communities.

scholarly journals Hyperpolarization-activated inward leakage currents caused by deletion or mutation of carboxy-terminal tyrosines of the Na+/K+-ATPase α subunit

2010 ◽  
Vol 135 (2) ◽  
pp. 115-134 ◽  
Author(s):  
Susan Meier ◽  
Neslihan N. Tavraz ◽  
Katharina L. Dürr ◽  
Thomas Friedrich
Keyword(s):  
Binding Site ◽  
Critical Role ◽  
Aromatic Amino Acids ◽  
Cation Binding ◽  
Carboxy Terminus ◽  
Leakage Currents ◽  
Α Subunit ◽  
Inward Currents ◽  
The Common ◽  
Carboxy Terminal

The Na+/K+-ATPase mediates electrogenic transport by exporting three Na+ ions in exchange for two K+ ions across the cell membrane per adenosine triphosphate molecule. The location of two Rb+ ions in the crystal structures of the Na+/K+-ATPase has defined two “common” cation binding sites, I and II, which accommodate Na+ or K+ ions during transport. The configuration of site III is still unknown, but the crystal structure has suggested a critical role of the carboxy-terminal KETYY motif for the formation of this “unique” Na+ binding site. Our two-electrode voltage clamp experiments on Xenopus oocytes show that deletion of two tyrosines at the carboxy terminus of the human Na+/K+-ATPase α2 subunit decreases the affinity for extracellular and intracellular Na+, in agreement with previous biochemical studies. Apparently, the ΔYY deletion changes Na+ affinity at site III but leaves the common sites unaffected, whereas the more extensive ΔKETYY deletion affects the unique site and the common sites as well. In the absence of extracellular K+, the ΔYY construct mediated ouabain-sensitive, hyperpolarization-activated inward currents, which were Na+ dependent and increased with acidification. Furthermore, the voltage dependence of rate constants from transient currents under Na+/Na+ exchange conditions was reversed, and the amounts of charge transported upon voltage pulses from a certain holding potential to hyperpolarizing potentials and back were unequal. These findings are incompatible with a reversible and exclusively extracellular Na+ release/binding mechanism. In analogy to the mechanism proposed for the H+ leak currents of the wild-type Na+/K+-ATPase, we suggest that the ΔYY deletion lowers the energy barrier for the intracellular Na+ occlusion reaction, thus destabilizing the Na+-occluded state and enabling inward leak currents. The leakage currents are prevented by aromatic amino acids at the carboxy terminus. Thus, the carboxy terminus of the Na+/K+-ATPase α subunit represents a structural and functional relay between Na+ binding site III and the intracellular cation occlusion gate.

scholarly journals Structural connections between Urals and West Siberia: the common stage on the boundary of Permian and Triassic periods

2019 ◽  
Vol 488 (3) ◽  
pp. 294-297
Author(s):  
V. N. Smirnov ◽  
K. S. Ivanov
Keyword(s):  
West Siberia ◽  
Strike Slip ◽  
Middle Urals ◽  
The Urals ◽  
The West ◽  
Open Part ◽  
The Middle Urals ◽  
Eastern Zone ◽  
Structural Connections ◽  
The Common

40Ar/39Ar-dating of the micas from the schists and blastomylonites collected from the fault which separates the Eastern zone of the Middle Urals dipped under the cover of the West Siberian plate from the open part of the geologic structures of the Urals, showed that the last phase of deformation was represented by a submeridional sinistral strike-slip faults with the age of 251 Ma. The appearance of the analyzed deformations practically exactly coincides in time with the formation of the grabens of meridional strike at the base of the West Siberian plate. 

Fixing Testadura’s Error

2020 ◽  
pp. 219-229
Author(s):  
William P. Seeley
Keyword(s):  
Case Studies ◽  
The Common ◽  
Normative Dimension

Chapter 8 returns to the puzzle of locating art. It explores a range of case studies which demonstrate how categorizing an artwork guides attention and shapes perception. The discussion thereby demonstrates that knowledge of normative conventions governing artistic appreciation shapes the perception of artworks. The psychology and neuroscience of perception can be used to model and explain these processes. The diagnostic recognition framework for engaging art therefore obviates the common perceptual mechanisms, dissolves the normative dimension of appreciation arguments, and points toward a resolution of the puzzle of locating art.

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