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Analysis of failure mechanisms of machine embroidered electrical contacts and solutions for improved reliability

Torsten Linz (2011)
abstract
In recent years, a number of research projects and patents have proposed to apply embroidery of conductive yarn to build electric circuits on textile substrates. To contact electronic modules or components to these circuits, embroidery itself was applied as a contacting method. Thereby, the embroidery needle is stitching through a conductive pad on an electronic substrate and is laying the conductive thread over this pad. The yarn and the pad establish an electrical contact. However, until today this contacting technology based on embroidery has not been adopted by the industry since reliability issues during stress were reported by different researchers. Yet, neither these failure phenomena were investigated comprehensively, nor was it attempted to understand their cause. This inhibited potential improvements to make these embroidered contacts reliable. Furthermore, the lack of alternative technologies for a reliable and volume producible contacting of embroidered circuits with electronic components or modules kept embroidered circuits from evolving to actual products. Therefore, this thesis primarily develops an understanding of the contact mechanism underlying embroidered contacts, and develops a theory that explains the failure phenomena. Secondarily the thesis overcomes these reliability issues by improving these contacts and by finding alternatives. The ultimate goal beyond this thesis is a volume producible contacting process. Therefore, this thesis looks mainly at machine embroidered contacts.
Please use this url to cite or link to this publication:
author
promoter
UGent
organization
alternative title
Analyse van faalmechanismen van machinaal geborduurde elektrische contacten en oplossingen voor een betere betrouwbaarheid
year
type
dissertation
publication status
published
subject
keyword
encapsulation, conductive yarn, electronics-in-textiles, contact model, reliability, embroidered circuits, fabric circuits, electrical contacts, embroidered contacts, adhesive contacts, adhesive bonding, non-conductive adhesive
pages
XI, 188 pages
publisher
Ghent University. Faculty of Engineering and Architecture
place of publication
Ghent, Belgium
defense location
Gent : Faculteit Ingenieurswetenschappen en Architectuur (Jozef Plateauzaal)
defense date
2011-10-07 14:00
ISBN
9789085784531
language
English
UGent publication?
yes
classification
D1
copyright statement
I have retained and own the full copyright for this publication
id
2023207
handle
http://hdl.handle.net/1854/LU-2023207
date created
2012-02-08 10:09:15
date last changed
2017-01-16 10:38:44
@phdthesis{2023207,
  abstract     = {In recent years, a number of research projects and patents have proposed to apply embroidery of conductive yarn to build electric circuits on textile substrates. To contact electronic modules or components to these circuits, embroidery itself was applied as a contacting method. Thereby, the embroidery needle is stitching through a conductive pad on an electronic substrate and is laying the conductive thread over this pad. The yarn and the pad establish an electrical contact. 
However, until today this contacting technology based on embroidery has not been adopted by the industry since reliability issues during stress were reported by different researchers. Yet, neither these failure phenomena were investigated comprehensively, nor was it attempted to understand their cause. This inhibited potential improvements to make these embroidered contacts reliable. Furthermore, the lack of alternative technologies for a reliable and volume producible contacting of embroidered circuits with electronic components or modules kept embroidered circuits from evolving to actual products.
Therefore, this thesis primarily develops an understanding of the contact mechanism underlying embroidered contacts, and develops a theory that explains the failure phenomena. Secondarily the thesis overcomes these reliability issues by improving these contacts and by finding alternatives. The ultimate goal beyond this thesis is a volume producible contacting process. Therefore, this thesis looks mainly at machine embroidered contacts.},
  author       = {Linz, Torsten},
  isbn         = {9789085784531},
  keyword      = {encapsulation,conductive yarn,electronics-in-textiles,contact model,reliability,embroidered circuits,fabric circuits,electrical contacts,embroidered contacts,adhesive contacts,adhesive bonding,non-conductive adhesive},
  language     = {eng},
  pages        = {XI, 188},
  publisher    = {Ghent University. Faculty of Engineering and Architecture},
  school       = {Ghent University},
  title        = {Analysis of failure mechanisms of machine embroidered electrical contacts and solutions for improved reliability},
  year         = {2011},
}

Chicago
Linz, Torsten. 2011. “Analysis of Failure Mechanisms of Machine Embroidered Electrical Contacts and Solutions for Improved Reliability”. Ghent, Belgium: Ghent University. Faculty of Engineering and Architecture.
APA
Linz, T. (2011). Analysis of failure mechanisms of machine embroidered electrical contacts and solutions for improved reliability. Ghent University. Faculty of Engineering and Architecture, Ghent, Belgium.
Vancouver
1.
Linz T. Analysis of failure mechanisms of machine embroidered electrical contacts and solutions for improved reliability. [Ghent, Belgium]: Ghent University. Faculty of Engineering and Architecture; 2011.
MLA
Linz, Torsten. “Analysis of Failure Mechanisms of Machine Embroidered Electrical Contacts and Solutions for Improved Reliability.” 2011 : n. pag. Print.