scholarly journals The Use of a Water Soluble Flexible Substrate to Embed Electronics in Additively Manufactured Objects: From Tattoo to Water Transfer Printed Electronics

Micromachines ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 474 ◽  
Author(s):  
Brice Le Borgne ◽  
Emmanuel Jacques ◽  
Maxime Harnois
Keyword(s):  
Additive Manufacturing ◽  
Potential Application ◽  
Printed Electronics ◽  
Flexible Substrate ◽  
Electronic Devices ◽  
Water Transfer ◽  
Water Soluble ◽  
Transfer Printing ◽  
Process Flow ◽  
3D Objects

The integration of electronics into the process flow of the additive manufacturing of 3D objects is demonstrated using water soluble films as a temporary flexible substrate. Three process variants are detailed to evaluate their capabilities to meet the additive manufacturing requirements. One of them, called water transfer printing, shows the best ability to fabricate electronics onto 3D additively manufactured objects. Moreover, a curved capacitive touchpad hidden by color films is successfully transferred onto the 3D objects, showing a potential application of this technology to fabricate fully additively manufactured discrete or even hidden electronic devices.

Electrohydrodynamic Printing for Advanced Micro/Nanomanufacturing: Current Progresses, Opportunities, and Challenges

2018 ◽  
Vol 6 (4) ◽  
Author(s):  
Yiwei Han ◽  
Jingyan Dong
Keyword(s):  
Additive Manufacturing ◽  
High Resolution ◽  
Potential Application ◽  
Printed Electronics ◽  
Photonic Devices ◽  
Critical Factors ◽  
Biomedical Sensors ◽  
Electrohydrodynamic Printing ◽  
Nanoscale Fabrication ◽  
Printing Processes

The paper provides an overview of high-resolution electrohydrodynamic (EHD) printing processes for general applications in high-precision micro/nanoscale fabrication and manufacturing. Compared with other printing approaches, EHD printing offers many unique advantages and opportunities in the printing resolution, tunable printing modes, and wide material applicability, which has been successfully applied in numerous applications that include additive manufacturing, printed electronics, biomedical sensors and devices, and optical and photonic devices. In this review, the EHDs-based printing mechanism and the resulting printing modes are described, from which various EHD printing processes were developed. The material applicability and ink printability are discussed to establish the critical factors of the printable inks in EHD printing. A number of EHD printing processes and printing systems that are suitable for micro/nanomanufacturing applications are described in this paper. The recent progresses, opportunities, and challenges of EHD printing are reviewed for a range of potential application areas.

Water Soluble Flexible and Wearable Electronic Devices: A Review

2021 ◽  
Author(s):  
Naveen Bokka ◽  
Venkatarao Selamneni ◽  
Vivek Adepu ◽  
Sandeep Jajjara ◽  
Parikshit Sahatiya
Keyword(s):  
Potential Application ◽  
Electronic Waste ◽  
Electronic Devices ◽  
Functional Materials ◽  
Water Soluble ◽  
Special Importance ◽  
Personal Healthcare ◽  
Healthcare Monitoring ◽  
Wearable Electronic ◽  
Wearable Electronic Devices

Abstract Electronic devices that are biodegradable, water-soluble and flexible and are fabricated using biodegradable materials are of great importance due to their potential application in biomedical implants, personal healthcare etc. Moreover, despite the swift growth of Semiconductor technologies and considering a device's shell life of two years, the subject of electronic waste (E-waste) disposal has become a major issue. Transient electronics is a rapidly expanding field that solves the issue of E-waste by destroying the device after usage. The device disintegration can be caused by a multitude of triggering events, an example is that the device totally dissolves and/or disintegrates when submerged in water. This technology enables us to utilise electronic devices for a set amount of time before quickly destroying them, lowering E-waste significantly. This review will highlight the recent advancement in water-soluble flexible electronic devices with more focus on functional materials (water insoluble), fabrication strategies and transiency understanding with special importance on areas where these devices exhibit potential application in flexible and wearable electronic devices which includes FETs, photodetectors, memristors and sensors for personal healthcare monitoring.

scholarly journals A thin, deformable, high-performance supercapacitor implant that can be biodegraded and bioabsorbed within an animal body

2021 ◽  
Vol 7 (2) ◽  
pp. eabe3097
Author(s):  
Hongwei Sheng ◽  
Jingjing Zhou ◽  
Bo Li ◽  
Yuhang He ◽  
Xuetao Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Electronic Devices ◽  
Form Factors ◽  
Time Frame ◽  
Water Soluble ◽  
Two Dimensional ◽  
Medical Electronics ◽  
Thin Structure ◽  
Shed Light

It has been an outstanding challenge to achieve implantable energy modules that are mechanically soft (compatible with soft organs and tissues), have compact form factors, and are biodegradable (present for a desired time frame to power biodegradable, implantable medical electronics). Here, we present a fully biodegradable and bioabsorbable high-performance supercapacitor implant, which is lightweight and has a thin structure, mechanical flexibility, tunable degradation duration, and biocompatibility. The supercapacitor with a high areal capacitance (112.5 mF cm−2 at 1 mA cm−2) and energy density (15.64 μWh cm−2) uses two-dimensional, amorphous molybdenum oxide (MoOx) flakes as electrodes, which are grown in situ on water-soluble Mo foil using a green electrochemical strategy. Biodegradation behaviors and biocompatibility of the associated materials and the supercapacitor implant are systematically studied. Demonstrations of a supercapacitor implant that powers several electronic devices and that is completely degraded after implantation and absorbed in rat body shed light on its potential uses.

Fabrication of Flexible Interposer Using Printing Method

2020 ◽  
Author(s):  
Atsuhiro Furuta ◽  
Kazuki Honjo ◽  
Jun Taniguchi
Keyword(s):  
Silicon Substrate ◽  
Nanoimprint Lithography ◽  
Printed Electronics ◽  
Electronic Devices ◽  
Master Mold ◽  
Sintering Process ◽  
Silver Ink ◽  
Press Method ◽  
Photolithography Process ◽  
Printing Method

Abstract In recent years, flexible electronic devices such as printed electronics are gathering attention. To make flexible connect between one circuit device and another circuit device, interposer is necessary. However, most of conventional interposers are not flexible, because there are made of silicon or glass substrate. To solve this problem, we have been developed fabrication process of flexible interposer. Master mold was fabricated by photolithography process. First, SU-8 resist was coated on silicon substrate with 5μm thickness. Then, photolithography process was carried out to SU-8 resist. After development, pillar shape master molds with diameters of 10 or 20 μm were obtained. After release coating of master molds, hole patterns for vias were transferred by UV nanoimprint lithography. The obtained hole patterns were diameter of 10 μm or 20 μm, and pitch of 21.0 μm and 40.1 μm, respectively. Next, these holes were filled with silver ink by roll press method. Then, sintering process was carried out to evaporate of solvent of silver ink. After that, flexible interposer was obtained. As a result, we have been succeeded in filling the holes array with silver ink. Obtained interposer vias, which were silver region, were 8.2 μm diameter and 3.3 μm height, or 20.3 μm diameter and 5.3 μm height for 10 mm square size.

scholarly journals An Ergonomic Customized-Tool Handle Design for Precision Tools using Additive Manufacturing: A Case Study

2018 ◽  
Vol 8 (7) ◽  
pp. 1200 ◽  
Author(s):  
Alfonso González ◽  
David Salgado ◽  
Lorenzo García Moruno ◽  
Alonso Sánchez Ríos
Keyword(s):  
Additive Manufacturing ◽  
Efficient Method ◽  
Potential Application ◽  
Parametric Design ◽  
Parametric Model ◽  
Hand Size ◽  
Custom Design ◽  
Laparoscopic Grasper ◽  
Design And Manufacture

A study was carried out with 135 surgeons to obtain a surgical laparoscopic grasper handle design that adapts to the size of each surgeon’s hand, in a functionally appropriate way, and has the sufficient ergonomics to avoid generating the problems detected nowadays. The main conclusion of the work is the practical 3D parametric design obtained for a laparoscopic surgical graspers handle that is scalable to fit each particular surgeon's hand size. In addition, it has been possible to determine that the anthropometric measure of the surgeon's hand defined as Palm Length Measured (PLM) allows the design of the 3D parametric model of the surgical handle to be conveniently scaled. The results show that both additive manufacturing and the application of ergonomics criterion provide an efficient method for the custom design and manufacture of this type of specialised tool, with potential application in other sectors.

Trajectory Planning for Conformal 3D Printing Using Non-Planar Layers

2018 ◽  
Author(s):  
Aniruddha V. Shembekar ◽  
Yeo Jung Yoon ◽  
Alec Kanyuck ◽  
Satyandra K. Gupta
Keyword(s):  
Additive Manufacturing ◽  
Trajectory Planning ◽  
Industrial Robots ◽  
Complex Geometries ◽  
Robot Arm ◽  
Joint Movement ◽  
Tool Orientation ◽  
3D Objects ◽  
Planar Surfaces ◽  
Build Time

Additive manufacturing (AM) technologies have been widely used to fabricate 3D objects quickly and cost-effectively. However, building parts consisting of complex geometries with multiple curvatures can be a challenging process for the traditional AM system whose capability is restricted to planar-layered printing. Using 6-DOF industrial robots for AM overcomes this limitation by allowing materials to deposit on non-planar surfaces with desired tool orientation. In this paper, we present collision-free trajectory planning for printing using non-planar deposition. Trajectory parameters subject to surface curvature are properly controlled to avoid any collision with printing surface. We have implemented our approach by using a 6-DOF robot arm. The complex 3D structures with various curvatures were successfully fabricated, while avoiding any failures in joint movement, holding comparable build time and completing with a satisfactory surface finish.

scholarly journals WHAT SENIORS HAVE TO SAY ABOUT THEIR ENGAGEMENT

2017 ◽  
Author(s):  
Sylvie Doré
Keyword(s):  
Additive Manufacturing ◽  
Quantitative Analysis ◽  
Student Engagement ◽  
Qualitative Analysis ◽  
Teaching Methods ◽  
Electronic Devices ◽  
Methods Course ◽  
Course Content ◽  
Elective Course

The goal of this pre-study was to prescribe a solution to a perceived decrease in student engagement in an elective course on additive manufacturing. The objectives were to:identify in what activities the students are engaging; identify causes for lack of engagement in their studies, if any;identify possible changes to the additive manufacturing course.A mixed (quantitative and qualitative) triangulation interpretivist approach was used to address the first two objectives. Approximately half (1/2) the students stated that their studies was not their priority, two thirds (2/3) reported that they attended university primarily to earn a diploma rather than to learn and again two thirds (2/3) said that they had difficulty concentrating, signs that most students are not fully engaged in learning. The qualitative analysis provided insight and nuance to the quantitative analysis. It made it possible to identify sources for lack of engagement. Apart from the presence of electronic devices which distract attention, teaching methods, course content and evaluation modalities were often cited. Based on the findings, three changes are suggested to the course

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