Comparison of SiC MOSFET Characteristics Following Body-Diode Forward-Current Stress

2019 ◽  
Vol 963 ◽  
pp. 583-587 ◽  
Author(s):  
Ronald Green ◽  
Aivars Lelis ◽  
Franklin Nouketcha
Keyword(s):  
First Generation ◽  
Stacking Faults ◽  
Charge Trapping ◽  
The Body ◽  
Operating Characteristics ◽  
Power Mosfets ◽  
Current Stress ◽  
Forward Current ◽  
Blocking Voltage ◽  
The One

The effect of forward-current stress of the body diode on the operating characteristics of various commercially-available SiC power MOSFETs was compared. The one set of recent-vintage second-generation 1200-V devices studied showed no degradation at all when the body diode was forward conducted—either in the body diode or the MOSFET characteristics. This is a distinct improvement from first generation 1200-V devices from various suppliers. This degradation phenomenon was consistent with the formation of stacking faults during current stress, which typically reduced MOSFET conductivity, and in some devices increased the Off-state leakage current. Although first-generation 1700-V MOSFET characteristics showed no degradation of the body diode, they did experience a degradation of the blocking voltage due to charge trapping during the stress.

Effects of Pulsed and DC Body-Diode Current Stress on the Stability of 1200-V SiC MOSFET I-V Characteristics

2020 ◽  
Vol 1004 ◽  
pp. 1027-1032
Author(s):  
Ronald Green ◽  
Aivars J. Lelis ◽  
Franklin L. Nouketcha
Keyword(s):  
Stacking Faults ◽  
Product Line ◽  
The Body ◽  
Pulsed Current ◽  
Forward Voltage ◽  
Power Mosfets ◽  
Current Stress ◽  
Device Processing ◽  
The Stability ◽  
Diode Current

1,200-V and 1,700-V SiC power MOSFETs from multiple suppliers were subject to dc and pulsed-current stress of the body-diode. Three of the five suppliers of 1,200-V devices evaluated showed no significant bipolar degradation, but the other two supplier’s devices showed varying degrees of degradation due this bipolar phenomenon. Electrical results of newly released 1,700-V devices from two suppliers showed significant degradation in the body-diode and MOSFET I-V characteristics following both dc and pulsed-current stress of their body-diodes. The electrical results presented in this work are consistent with basal plane dislocations (BPDs) that form stacking faults during forward conduction of the body-diode. Significant drift in the body-diode forward voltage and MOSFET on-resistance indicates that a much higher BPD density may be present in 1,700-V devices in comparison to the more mature 1,200-V device offerings. The likely presence of BPDs can lead to significant reliability issues in some modern SiC power MOSFETs, and their distribution seems to vary across suppliers and among devices with the same rating and from the same supplier. These differences are likely due to variations in wafer and device processing among suppliers and within a given product line from a single supplier.

Investigation into the Body Diode Degradation of 6.5 kV SiC MOSFETs

2020 ◽  
Vol 1004 ◽  
pp. 814-821 ◽  
Author(s):  
Enea Bianda ◽  
Andrei Mihaila ◽  
Gianpaolo Romano ◽  
Lars Knoll ◽  
Stephan Wirths ◽  
...  
Keyword(s):  
Current Pulse ◽  
Epitaxial Layer ◽  
Stacking Faults ◽  
The Body ◽  
Contributing Factors ◽  
Current Stress ◽  
Forward Current ◽  
Surge Current

The aim of this study is to investigate the main contributing factors to the degradation of the intrinsic body diode in SiC MOSFETs, caused by the expansion of stacking faults (SFs) from the substrate into the epitaxial layer, and how it affects their performance. Additionally, a comparison between DC forward current stress and surge current pulse stress is shown.

Development of 3.3 kV SiC-MOSFET: Suppression of Forward Voltage Degradation of the Body Diode

2014 ◽  
Vol 778-780 ◽  
pp. 951-954 ◽  
Author(s):  
Shigehisa Yamamoto ◽  
Yukiyasu Nakao ◽  
Nobuyuki Tomita ◽  
Shuhei Nakata ◽  
Satoshi Yamakawa
Keyword(s):  
Cost Reduction ◽  
Screening Method ◽  
Stacking Faults ◽  
The Body ◽  
Power Devices ◽  
Electron Hole ◽  
Forward Current ◽  
Voltage Degradation ◽  
Hole Recombination ◽  
Internal Body

In order to achieve cost reduction or shrinkage of power devices, an internal body diode, which forms in a MOSFET parasitically, can be designed as a free-wheeling diode in substitution for an external Schottky barrier diode (SBD). However, in a SiC p-i-n diode, forward current stress causes reliability degradation due to expansion of the electron-hole recombination-induced stacking faults. Applying the process optimization of the epitaxial layer for the reduction of recombination-induced stacking faults and the body diode screening method to 3.3 kV SiC-MOSFETs, we obtained more stable devices under forward current operation.

‘If you shoulder a rifle […] let it be for Ireland’: James Connolly's War on War

2018 ◽  
Vol 13 (3) ◽  
pp. 364-381
Author(s):  
Margot Gayle Backus ◽  
Spurgeon Thompson
Keyword(s):  
World War I ◽  
The Body ◽  
Party Leader ◽  
Irish Nationalism ◽  
British Imperialism ◽  
Communications Networks ◽  
Easter Rising ◽  
Trade Unionist ◽  
The One ◽  
National Governments

As virtually all Europe's major socialist parties re-aligned with their own national governments with the outbreak of World War I, Irish socialist and trade unionist James Connolly found himself internationally isolated by his vociferous opposition to the war. Within Ireland, however, Connolly's energetic and relentless calls to interrupt the imperial transportation and communications networks on which the ‘carnival of murder’ in Europe relied had the converse effect, drawing him into alignment with certain strains of Irish nationalism. Connolly and other socialist republican stalwarts like Helena Molony and Michael Mallin made common cause with advanced Irish nationalism, the one other constituency unamenable to fighting for England under any circumstances. This centripetal gathering together of two minority constituencies – both intrinsically opposed, if not to the war itself, certainly to Irish Party leader John Redmond's offering up of the Irish Volunteers as British cannon fodder – accounts for the “remarkably diverse” social and ideological character of the small executive body responsible for the planning of the Easter Rising: the Irish Republican Brotherhood's military council. In effect, the ideological composition of the body that planned the Easter Rising was shaped by the war's systematic diversion of all individuals and ideologies that could be co-opted by British imperialism through any possible argument or material inducement. Although the majority of those who participated in the Rising did not share Connolly's anti-war, pro-socialist agenda, the Easter 1916 Uprising can nonetheless be understood as, among other things, a near letter-perfect instantiation of Connolly's most steadfast principle: that it was the responsibility of every European socialist to throw onto the gears of the imperialist war machine every wrench on which they could lay their hands.

The Woman Who Turned Into a Jaguar, and Other Narratives of Native Women in Archives of Colonial Mexico

2017 ◽  
Author(s):  
Lisa Sousa
Keyword(s):  
Gender Relations ◽  
Civil Disobedience ◽  
Indigenous Communities ◽  
The Body ◽  
Colonial Rule ◽  
Criminal Records ◽  
Native Women ◽  
Women's Lives ◽  
Important Position ◽  
The One

The Woman Who Turned Into a Jaguar examines gender relations in indigenous societies of central Mexico and Oaxaca from the 1520s to the 1750s, focusing mainly on the Nahua, Ñudzahui (Mixtec), Bènizàa (Zapotec), and Ayuk (Mixe) people. This study draws on an unusually rich and diverse corpus of original sources, including Ñudzahui- (Mixtec-), Tíchazàa- (Zapotec-), and mainly Nahuatl-language and Spanish civil and criminal records, published texts, and pictorial manuscripts. The sources come from more than 100 indigenous communities of highland Mexico. The book considers women’s lives in the broadest context possible by addressing a number of interrelated topics, including: the construction of gender; concepts of the body; women’s labor; marriage rituals and marital relations; sexual attitudes; family structure; the relationship between household and community; and women’s participation in riots and other acts of civil disobedience. The study highlights subtle transformations and overwhelming continuities in indigenous social attitudes and relationships. The book argues that profound changes following the Spanish conquest, such as catastrophic depopulation, economic pressures, and the imposition of Christian marriage, slowly eroded indigenous women’s status. Nevertheless, gender relations remained inherently complementary. The study shows how native women and men under colonial rule, on the one hand, pragmatically accepted, adopted, and adapted certain Spanish institutions, concepts, and practices, and, on the other, forcefully rejected other aspects of colonial impositions. Women asserted their influence and, in doing so, they managed to retain an important position within their households and communities across the first two centuries of colonial rule.

The Image of the Hasmoneans: A New Perspective

2018 ◽  
Author(s):  
Vered Noam
Keyword(s):  
First Generation ◽  
Second Temple ◽  
The Other ◽  
Three Generations ◽  
The Creation ◽  
New Perspective ◽  
The One

In attempting to characterize Second Temple legends of the Hasmoneans, the concluding chapter identifies several distinct genres: fragments from Aramaic chronicles, priestly temple legends, Pharisaic legends, and theodicean legends explaining the fall of the Hasmonean dynasty. The chapter then examines, by generation, how Josephus on the one hand, and the rabbis on the other, reworked these embedded stories. The Josephan treatment aimed to reduce the hostility of the early traditions toward the Hasmoneans by imposing a contrasting accusatory framework that blames the Pharisees and justifies the Hasmonean ruler. The rabbinic treatment of the last three generations exemplifies the processes of rabbinization and the creation of archetypal figures. With respect to the first generation, the deliberate erasure of Judas Maccabeus’s name from the tradition of Nicanor’s defeat indicates that they chose to celebrate the Hasmonean victory but concealed its protagonists, the Maccabees, simply because no way was found to bring them into the rabbinic camp.

scholarly journals Experiential ownership and body ownership are different phenomena

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Caleb Liang ◽  
Wen-Hsiang Lin ◽  
Tai-Yuan Chang ◽  
Chi-Hong Chen ◽  
Chen-Wei Wu ◽  
...  
Keyword(s):  
Conscious Experience ◽  
Distinct Type ◽  
Body Part ◽  
The Body ◽  
Body Ownership ◽  
Rubber Hand ◽  
Person Perspective ◽  
The One ◽  
First Time ◽  
Full Body

AbstractBody ownership concerns what it is like to feel a body part or a full body as mine, and has become a prominent area of study. We propose that there is a closely related type of bodily self-consciousness largely neglected by researchers—experiential ownership. It refers to the sense that I am the one who is having a conscious experience. Are body ownership and experiential ownership actually the same phenomenon or are they genuinely different? In our experiments, the participant watched a rubber hand or someone else’s body from the first-person perspective and was touched either synchronously or asynchronously. The main findings: (1) The sense of body ownership was hindered in the asynchronous conditions of both the body-part and the full-body experiments. However, a strong sense of experiential ownership was observed in those conditions. (2) We found the opposite when the participants’ responses were measured after tactile stimulations had ceased for 5 s. In the synchronous conditions of another set of body-part and full-body experiments, only experiential ownership was blocked but not body ownership. These results demonstrate for the first time the double dissociation between body ownership and experiential ownership. Experiential ownership is indeed a distinct type of bodily self-consciousness.

scholarly journals Knowledge, authority, and positionality in Asian immigrant female faculty teaching diversity classes

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Jung-ah Choi ◽  
Jae Hoon Lim
Keyword(s):  
Multicultural Education ◽  
Professional Knowledge ◽  
Teaching Experience ◽  
Faculty Of Color ◽  
The Body ◽  
Power Dynamics ◽  
Safe Environment ◽  
Faculty Teaching ◽  
The One ◽  
Body Knowledge

AbstractThis paper is a self-reflective narrative of our teaching experience as two immigrant Asian female professors who teach Multicultural Education. Employing collaborative autoethnography (CAE), the study addresses the issues of authority, positionality, and legitimacy of knowledge claims in critical feminist pedagogy. Two research questions guided our inquiry: 1. How does a teacher’s racial positionality play out in exercising professional knowledge, and conversely, 2. How does seemingly neutral professional knowledge become racialized in the discussions of race? Major findings demonstrate the double-edged contradictions in the body/knowledge nexus manifested in our everyday teaching contexts. On the one hand, the bodily dimension of teacher knowledge is de-racialized because of institutional norms and cultures. On the other hand, there are times professional knowledge becomes racialized through the teacher’s body. Understanding the body/knowledge nexus that invites precarious power dynamics in racial discussions and even blatantly dismisses our professional knowledge, we, as an immigrant faculty of color, find it impossible to create a safe environment for participatory, critical discourse. Acknowledging our triple marginality, we put forth the concept of “pedagogy of fear” (Leonardo, Z., & Porter, R. K. (2010). Pedagogy of fear: Toward a Fanonian theory of ‘safety’ in race dialogue. Race, Ethnicity and Education, 13(2), 139–157) which squarely disrupts the idea of a safe environment in race dialog and urges teachers to confront their own/their students’ fear and create a space of teaching vulnerably.

SEEING AND HEARING DISABILITY IN MAURICIO KAGEL'S REPERTOIRE FROM STAATSTHEATER

Tempo ◽  
2021 ◽  
Vol 75 (296) ◽  
pp. 7-20
Author(s):  
Bethany Younge
Keyword(s):  
Disability Studies ◽  
Social Institutions ◽  
The Body ◽  
Avant Garde ◽  
Hearing Disability ◽  
Physical Action ◽  
The One ◽  
Traditional Roles

AbstractThis article adopts a disability studies perspective to evaluate the ways in which Mauricio Kagel's Repertoire from Staatstheater reimagines human bodies. Objects and bodies interact in myriad ways within the one hundred vignettes of Repertoire: some objects hinder or aid the bodies on stage, while others become incorporated within the body, acting as a single expressive unit. My analysis demonstrates the ways in which both objects and bodies transform their traditional roles as ascribed by society, rejecting procrustean physiques. Using disability studies concepts such as embodiment and experientialism I evaluate sound and physical action as inextricable expressions of imaginative corporealities. Reflecting upon Kagel's identity as an outsider of the European avant-garde, as well as his irreverence for oppressive social institutions, I evince that other forms of hierarchical disruptions are at play, namely that abled bodies do not preside over disabled ones and notions of beauty hold no clout.

scholarly journals Towards a Kenotic Identity Politics: Migration, Transformation and the Eucharist

Religions ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 380
Author(s):  
Matthew John Paul Tan
Keyword(s):  
Identity Politics ◽  
The Body ◽  
The Other ◽  
Body Of Christ ◽  
Eucharistic Theology ◽  
Critical Tradition ◽  
Other Hand ◽  
Massive Influx ◽  
Identity Based ◽  
The One

This paper will focus on one element of the pushback against the massive influx of immigrants taken in for humanitarian purposes, namely, an identity-based chauvinism which uses identity as the point of resistance to the perceived dilution of that identity, brought about by the transformation of culture induced by the incorporation of a foreign other. The solution to this perceived dilution is a simultaneous defence of that culture and a demand for a conformity to it. While those in the critical tradition have encouraged a counter-position of revolutionary transformation by the other through ethics, dialogue, or the multitude, such a transformation is arguably impeded by what is ultimately a repetition of the metaphysics of conformity. Drawing on the personalism of Emmanuel Mounier and the Eucharistic theology of Creston Davis and Aaron Riches, this paper submits an alternative identity politics position that completes the revolutionary impulse. Identity here is not the flashpoint of a self-serving conflict, but the launch-point of politics of self-emptying, whose hallmarks include, on the one hand, a never-ending reception of transformation by the other, and on the other hand, an anchoring in the Body of Christ that is at once ever-changing and never-changing.

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