UNIT 2
LITERATURE REVIEW
Early Work
Fabrication
2 LITERATURE REVIEW
2.1 Early Work
The influence of strain on the mobility of intrinsic silicon was first observed in 1954 by C.S Smith [19]. The origin of strained Si film grown on relaxed SiGe can be traced to the 1980s [19]. While strain effects were not largely exploited, it was in the early 1990s that the strain was once again revived at Massachusetts Institute of Technology (MIT), USA on process induced and biaxial strain. In 1992, the first n-channel MOSFET with a strained Si channel exhibiting a 70% higher mobility was demonstrated [19]. The commercial adoption of strain technology was followed in 90 nm technology node by all major semiconductor companies like AMD, Integrated
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However, as demonstrated by our results, there are undesirable side effects with increasing equivalent Ge content such as a roll off in Vth, which may affect the device characteristics and performance significantly.
In year 2007, M. J. Kumar et al[13] have first time examined the impact of various device parameters like strain (concentration of Ge in SiGe substrate), gate length, S/D junction depths, substrate (body) doping, strained silicon thin-film thickness and gate work function on the threshold voltage of strained-Si on Si1-xGexMOSFET. There is a significant drop in threshold voltage with increasing strain in relaxed Si1-xGex substrate and decreasing channel length. The increase in mole fraction of Ge, enhances the performance of MOSFETs in terms of transconductance and speed because of an increase in the carrier mobility. In the Same year V.Venkataraman [22], have also demonstrated fully depleted strained-Si on SGOI MOSFETs. This article also shows that there is significant increase in mobility due to strain.
In year 2010, A. Chaudhry have submitted a review of strained silicon technology. The uniaxial and biaxial structures proposed by both industry and academia via literature and patents have been reviewed. The main structures under biaxial category are relaxed SiGe, graded SiGe, strained SOI, SGOI and
Figure 1 2 Illustration of PCM cross-bar array integrated on the top of the CPU without (left) and with (right) PCM logic devices showing the area relief on the underneath
Information and communication technology has been adopted and implemented within various sectors of the economy. This is attributed to the benefits of technology in facilitating organizational activities and processes and its use in meeting the changes which characterize the modern society. The health sector is one of the industries which have significantly implemented technology. The health sector’s technological applications have been achieved within health information systems. The implementation of technology in this sector has resulted into both positive and negative implications on health
The increasing problem of Methicillin-resistant Staphylococcus aureus (MRSA) colonization and infection greatly affects patients’ health and safety and increases unnecessary healthcare expenditures (Lindberg, Carlsson, Hogman, & Skytt, 2009). Many qualitative studies have been conducted which aimed at obtaining more understanding of patients’ experiences of being infected and isolated due to MRSA colonization. In this paper, the author aims to a) discuss her two chosen qualitative studies and relate it to her clinical question; b) perform an appraisal of these studies; c) evaluate the findings, trustworthiness, and contribution to practice of each study; d) examine how the studies’ findings from will assist in
Life is difficult for anyone. Some times individuals feel lost or upset and they use substances. When an individual is dependent on substances it is difficult for any individual to deal with these emotions. In the DSM-V alcohol-related disorders include alcohol use disorder, alcohol intoxication and alcohol withdrawal. To be classified as an individual with alcohol disorder one needs to drink alcohol in large amounts or for a longer period than intended. There is a persistent desire to drink and one can’t control alcohol use. These individuals miss out on important social, occupational, or recreational activities. The alcohol is used to the point that it becomes physically hazardous to one’s self or others. Alcohol disorder is defined by a group of behavioral and physical symptoms, which can lead to withdrawal, tolerance and craving alcohol (American Psychiatric Association, 2013).
I will be investigating the following research question: how is coming out as a non-heterosexual person framed and preformed in YouTube videos? Mills (1959) explains that, as researchers we must learn to use our life experiences in our intellectual work (196). I have never come out in a YouTube video. However, as a person that does not identify as heterosexual I have experienced coming out in a variety of contexts. As such, I hope to lean on this personal experience to shape my craftsmanship (Mills, 1959: 196; van den Hoonaard, 2014: 156; Inglis, 2010: 509).
Often, the aim of the research is to achieve specific goals. Some studies are usually experimental in nature and are often unique. However, in most cases, the research can be based on previous studies conducted. This is known as a literature review. A literature review is the identification and analysis of documents which contain information that is related to a defined research problem. It is often the written component of a report or a research paper, and it discusses the reviewed documents (Stockburger, 2006). Often researchers may favor qualitative approaches to a research issue while others may favor quantitative approaches. The purpose of this paper is to provide a brief overview of literature review and its importance in research. The paper also defines the type of study where literature review has more significance and explains why that is so.
Janssen and O’Brien’s (2014) article from International Journal for the Scholarship of Teaching and Learning describes how motivation and ability factor into the variation of homework and exam scores. Researchers found that attitudes like procrastination will affect homework grades but not affect exam scores. The study also analyzes the indirect impact homework may have on exam performance. Researchers collected data from 687 college students all enrolled in several different economic courses. Data was collected through surveys in the first two weeks of classes. Students self reported on their motivation. Researchers found that motivation and ability matter, but are independent of one another. Ability can predict both exam and homework grades and homework score is a strong indicator of exam scores. Other major findings include homework related behaviors indirectly effect exam scores and how students approach their homework greatly affects grades as well. A limitation of this study was the inability to separate motivation, attitudes and behavior in order to conclude causation. Some other limitations included the lack of data analyzing motivation as well as the students were all taking a similar class subject whether it was microeconomics, macro, or others. Some strengths of this study include the results being consistent with suggesting homework is beneficial and concluding students enjoy homework that is online because it allows them to work at their own
The age of language acquisition can be an important indicator of positive prognosis and social functioning in children with Autism Spectrum Disorder (ASD). Children with ASD have impairments in social communication and interaction, and a comprehensive communication assessment is a core component of diagnosing and evaluation. Assessments are used to utilize measures that capture each child’s communication ability and there is extensive literature available detailing the language deficits of children with ASD. However, first acquired language in different age ranges were probed with children with ASD to find the relationship to cognitive abilities and adaptive skills (Mayo, Chlebowski, Fein, and Eigsti, 2013).
The sample of cases have been chosen based upon availability of published academic data; this is yet another drawback of the nature of the field and highlights a need for further research on the subject area. Though there has been an increase in female home-grown radicalisation, the numbers of actual cases of female terrorism are low which means there is not much choice when it comes to picking case studies. Also, as the research area is a fairly recent phenomenon, there are significant gaps in knowledge and so available, academic literature is farce (Qazi, 2011). This reflection may present a problem with the discussions in this literature as the cases are not as detailed as one would
External Visual Inspection by Low Power Microscope : No anomalies were observed at external package structures
Alcohol related problems is one of today’s contemporary issues, as there are studies that suggest that due to alcohol related problems there are various impacts that it can have to an individual, and it can include social harms and any antisocial behaviour, such as alcohol fuelled violence. This literature review will explore the academic readings, that help assist identity key issues relating to a criminology perspective of alcohol related problems. Ergo, based on past research from the academic readings this literature review will explore prevention strategies that help reduce social harm to the individual and the community, and also the consequences that alcohol can lead to. Also, this
Anti-vaccination proponents have largely embedded their energies in promoting doubt in parents, instructing forms of biomedical fear while capitalizing on their spiritual and paranormal belief naivety to enforce the same. These approaches are ensured to make it possible that even with any increase in people’s knowledge and evidence, their rational strength over anti-vaccine movements become a myriad.[Lewandowsky et al. 2013] Decision making becomes a weak thing to do because by looking at both ends, things seem to parallel each other. There those who believe in an unquestionable trust in political figures, doctors and
Greater effects of high- compared with moderate-intensity interval training on cardio-metabolic variables, blood leptin concentration and rating of perceived exertion in obese adolescent females was published in 2015. To the best of the researcher’s knowledge, this kind of study has not been done before and hypothesized that the HIIT would produce a more improvement in leptin levels, cardiorespiratory fitness and the participant’s rate of perceived exertion (RPE) after a HIIT workout. Their methods and procedures were similar to other studies completed.
The fin sidewall surfaces along which the transistor current flows were assumed to be {110} crystallographic planes, with transistor current flow in a ⟨110⟩ direction. To boost transistor ON-state current, 2-GPa (tensile) uniaxial stress has been introduced in the fin channel region for nFETs, whereas −2-GPa (compressive) uniaxial stress was introduced in the fin channel region for pFETs.
We have now discussed the two extremes in electronic materials; a conductor, and an insulator we will now move to a material that lies in between these two, a semiconductor. The