Transfer Printing of Stretchable Electronics on Conformal Surfaces

2015 ◽  
Author(s):  
Apoorv Sharma ◽  
Rahul Rai
Keyword(s):  
Printed Circuit Board ◽  
Structural Strength ◽  
Shape Representation ◽  
Circuit Board ◽  
Stretchable Electronics ◽  
Transfer Printing ◽  
Electronic Circuits ◽  
Fabrication Technology ◽  
Printed Circuit ◽  
Planar Surfaces

In this paper, we outline a hybrid process to print stretchable electronic circuits on non-planar surfaces. Using this process, the stretchable structures, generated using traditional printed circuit board fabrication technology can be printed on conformal surfaces using transfer printing by PDMS membranes. Three different configurations of stretchable structures for use in the circuits are also compared for their robustness of shape representation and structural strength. The application of the proposed process is illustrated through application examples.

Analysis of surface insulation resistance related failures in electronics by circuit simulation

Circuit World ◽  
2017 ◽  
Vol 43 (2) ◽  
pp. 45-55 ◽  
Author(s):  
Vadimas Verdingovas ◽  
Salil Joshy ◽  
Morten Stendahl Jellesen ◽  
Rajan Ambat
Keyword(s):  
Printed Circuit Board ◽  
Electronic Device ◽  
Early Stage ◽  
Circuit Simulation ◽  
Circuit Board ◽  
Insulation Resistance ◽  
Electronic Circuits ◽  
Content Type ◽  
Printed Circuit ◽  
Surface Insulation Resistance

Purpose The purpose of this study is to show that the humidity levels for surface insulation resistance (SIR)-related failures are dependent on the type of activators used in no-clean flux systems and to demonstrate the possibility of simulating the effects of humidity and contamination on printed circuit board components and sensitive parts if typical SIR data connected to a particular climatic condition are available. This is shown on representative components and typical circuits. Design/methodology/approach A range of SIR values obtained on SIR patterns with 1,476 squares was used as input data for the circuit analysis. The SIR data were compared to the surface resistance values observable on a real device printed circuit board assembly. SIR issues at the component and circuit levels were analysed on the basis of parasitic circuit effects owing to the formation of a water layer as an electrical conduction medium. Findings This paper provides a summary of the effects of contamination with various weak organic acids representing the active components in no-clean solder flux residue, and demonstrates the effect of humidity and contamination on the possible malfunctions and errors in electronic circuits. The effect of contamination and humidity is expressed as drift from the nominal resistance values of the resistors, self-discharge of the capacitors and the errors in the circuits due to parasitic leakage currents (reduction of SIR). Practical/implications The methodology of the analysis of the circuits using a range of empirical leakage resistance values combined with the knowledge of the humidity and contamination profile of the electronics can be used for the robust design of a device, which is also important for electronic products relying on low current consumption for long battery lifetime. Originality/value Examples provide a basic link between the combined effect of humidity and contamination and the performance of electronic circuits. The methodology shown provides the possibility of addressing the climatic reliability of an electronic device at the early stage of device design by using typical SIR data representing the possible climate exposure.

Materials for Stretchable Electronics Compliant with Printed Circuit Board Fabrication

2012 ◽  
pp. 161-185
Author(s):  
Matthias Adler ◽  
Ruth Bieringer ◽  
Thomas Schauber ◽  
Jürgen Günther
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Stretchable Electronics ◽  
Printed Circuit

Reliability and Application Scenarios of Stretchable Electronics Realized Using Printed Circuit Board Technologies

2012 ◽  
pp. 207-233 ◽  
Author(s):  
Jan Vanfleteren ◽  
Frederick Bossuyt ◽  
Thomas Löher ◽  
Yung-Yu Hsu ◽  
Mario Gonzalez ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Stretchable Electronics ◽  
Printed Circuit

scholarly journals Universal synthesis of conductive liquid network in polymers enabling elastic printed circuit board technology

2021 ◽  
Author(s):  
Jiheong Kang ◽  
Wonbeom Lee ◽  
Hyunjun Kim ◽  
Inho Kang ◽  
Hongjun Park ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Acoustic Field ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
System Level ◽  
Large Strains ◽  
Stretchable Electronics ◽  
Electronic Components ◽  
Conductive Liquid ◽  
Printed Circuit

Abstract Stretchable electronics are considered next-generation electronic devices in a broad range of emerging fields, including soft robotics1,2, biomedical devices3,4, human-machine interfaces5,6, and virtual or augmented reality devices7,8. A stretchable printed circuit board (S-PCB) is a basic conductive framework for the facile assembly of system-level stretchable electronics with various electronic components. Since an S-PCB is responsible for electrical communications between numerous electronic components, the conductive lines in S-PCB should strictly satisfy the following features: (i) metallic conductivity, (ii) constant electrical resistance during dynamic stretching, and (iii) tough interface bonding with various components9. Despite recent significant advances in intrinsically stretchable conductors10,11,12, they cannot simultaneously satisfy the above stringent requirements. Here, we present a new concept of conductive liquid network-based elastic conductors. These conductors are based on unprecedented liquid metal particles assembled network (LMPNet) and an elastomer. The unique assembled network structure and reconfigurable nature of the LMPNet conductor enabled high conductivity, high stretchability, tough adhesion, and imperceptible resistance changes under large strains, which enabled the first elastic-PCB (E-PCB) technology. We synthesized LMPNet through an acoustic field-driven cavitation event in the solid state. When an acoustic field is applied, liquid metal nanoparticles (LMPnano) are remarkably generated from original LMPs and assemble into a highly conductive particle network (LMPNet). Finally, we demonstrated a multi-layered E-PCB, in which various electronic components were integrated with tough adhesion to form a highly stretchable health monitoring system. Since our synthesis of LMPNet is universal, we could synthesize LMPNet in various polymers, including hydrogel, self-healing elastomer and photoresist and add new functions to LMPNet.

scholarly journals Highly Integrated Elastic Island-Structured Printed Circuit Board with Controlled Young’s Modulus for Stretchable Electronics

Micromachines ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 617
Author(s):  
Duho Cho ◽  
Junhyung Kim ◽  
Pyoenggeun Jeong ◽  
Wooyoung Shim ◽  
Su Yeon Lee ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Printed Circuit Board ◽  
Young's Modulus ◽  
Circuit Board ◽  
Stretchable Electronics ◽  
Fully Integrated ◽  
Printed Circuit ◽  
Reinforcing Agent ◽  
Highly Stretchable ◽  
Levels Of Integration

A stretchable printed circuit board (PCB), which is an essential component of next-generation electronic devices, should be highly stretchable even at high levels of integration, as well as durable under repetitive stretching and patternable. Herein, an island-structured stretchable PCB composed of materials with controlled Young’s modulus and viscosity by adding a reinforcing agent or controlling the degree of crosslinking is reported. Each material was fabricated with the most effective structures through a 3D printer. The PCB was able to stretch 71.3% even when highly integrated and was patterned so that various components could be mounted. When fully integrated, the stress applied to the mounted components was reduced by 99.9% even when stretched by over 70%. Consequently, a 4 × 4 array of capacitance sensors in a stretchable keypad demonstration using our PCB was shown to work, even at 50% stretching of the PCB.

scholarly journals Miura-ori enabled stretchable circuit boards

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Yongkai Li ◽  
Weixuan Liu ◽  
Yang Deng ◽  
Wei Hong ◽  
Hongyu Yu
Keyword(s):  
Industrial Production ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Stretchable Electronics ◽  
Circuit Boards ◽  
Engineering Applications ◽  
Printed Circuit ◽  
Flexible Printed Circuit ◽  
Design And Manufacture

AbstractOrigami, an ancient form of papercraft, provides a way to develop functional structures for engineering applications. In this paper, we report an approach to design and manufacture a stretchable circuit board (SCB) with origami structures. The benefits of developable, flat-foldable, and rigid-foldable origami-based structures as SCBs are discussed, and a representative structure, Miura fold (or Miura-ori), is chosen to be investigated. Under the constraints induced by the mounted components’ dimensions, the Miura-ori structures for specific applications can be defined. We propose three methods for better fabrication, including direct folding, stiffness modification, and kirigami enhancement, to improve a planar sheet’s foldability. A wearable ECG (electrocardiogram) system based on MO-SCB (Miura-ori enabled SCB) technology is built, and the stretchable portion is made of commercial FPCBs (flexible printed circuit board), providing desired stretchability and reliability. The proposed technology routine is compatible with industrial production and may pave the application of stretchable electronics.

Development of a fabrication technology for integrating low cost optical interconnects on a printed circuit board

2006 ◽  
Author(s):  
Geert Van Steenberge ◽  
Nina Hendrickx ◽  
Peter Geerinck ◽  
Erwin Bosman ◽  
Steven Van Put ◽  
...  
Keyword(s):  
Optical Interconnects ◽  
Printed Circuit Board ◽  
Low Cost ◽  
Circuit Board ◽  
Fabrication Technology ◽  
Printed Circuit

scholarly journals Methods of Checking Printed Circuits

1984 ◽  
Vol 11 (3) ◽  
pp. 215-217
Author(s):  
I. Hajdu ◽  
P. Bánlaki ◽  
J. Pinkola ◽  
E. Tóth
Keyword(s):  
Integrated Circuits ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Electronic Circuits ◽  
High Quality ◽  
Printed Circuit ◽  
Printed Circuits ◽  
Quality Testing ◽  
Quality And Reliability ◽  
Quality Production

Printed circuits make up to 20 to 40 per cent of the value of electronic circuits.Quality and reliability requirements have been boosted by the general use of complex integrated circuits. An economical and high quality production is preconditioned by the continuous checking of prime materials and technologies.After a brief review of checking methods, a short examination of quality testing of the end product (double - or multilayer printed circuit board) is given, involving checking methods of assembled and non assembled boards.

scholarly journals Detection of transient disturbing signals on PC boards

2008 ◽  
Vol 6 ◽  
pp. 279-284
Author(s):  
S. Korte ◽  
O. Döring ◽  
H. Garbe
Keyword(s):  
Printed Circuit Board ◽  
Signal Propagation ◽  
Test Method ◽  
Circuit Board ◽  
Probe Design ◽  
Electronic Circuits ◽  
Printed Circuit ◽  
Device Operation ◽  
Different Parts

Abstract. This paper shows a possibility to visualize signal propagation in electronic circuits. Instead of using various galvanic measurement points all over the circuit, a test method is shown which measures the radiated field of the printed circuit board. By use of a 2-dimensional positionable field probe it is possible to get an overview over the signals running on the different parts of the PCB. In order to measure transient disturbing signals and distinguish them from normal device operation, problems of probe design and triggering need to be discussed.

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