Transfer Printing Processes

2011 ◽  
pp. 69-92 ◽  
Author(s):  
Luciano F. Boesel
Keyword(s):  
Transfer Printing ◽  
Printing Processes

scholarly journals Batch Transfer Printing of Small-Size Silicon Nano-Films with Flat Stamp

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1255
Author(s):  
Wenping Cao ◽  
Guochang Liu ◽  
Jinwei Miao ◽  
Guojun Zhang ◽  
Jiangong Cui ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Large Scale ◽  
Electronic Devices ◽  
Cmos Process ◽  
Curing Agent ◽  
Intermolecular Force ◽  
Transfer Printing ◽  
Flexible Sensors ◽  
Line Widths ◽  
Printing Processes

Silicon nano-film is essential for the rapidly developing fields of nanoscience and flexible electronics, due to its compatibility with the CMOS process. Viscoelastic PDMS material can adhere to Si, SiO2, and other materials via intermolecular force and play a key role in flexible electronic devices. Researchers have studied many methods of transfer printing silicon nano-films based on PDMS stamps with pyramid microstructures. However, only large-scale transfer printing processes of silicon nano-films with line widths above 20 μm have been reported, mainly because the distribution of pyramid microstructures proposes a request on the size of silicon nano-films. In this paper, The PDMS base to the curing agent ratio affects the adhesion to silicon and enables the transfer, without the need for secondary alignment photolithography, and a flat stamp has been used during the transfer printing, with no requirement for the attaching pressure and detaching speed. Transfer printing of 20 μm wide structures has been realized, while the success rate is 99.3%. The progress is promising in the development of miniature flexible sensors, especially flexible hydrophone.

Wearable human–machine interface based on PVDF piezoelectric sensor

2016 ◽  
Vol 39 (4) ◽  
pp. 398-403 ◽  
Author(s):  
Wentao Dong ◽  
Lin Xiao ◽  
Wei Hu ◽  
Chen Zhu ◽  
YongAn Huang ◽  
...  
Keyword(s):  
Mobile Robot ◽  
Piezoelectric Sensor ◽  
Stretchable Electronics ◽  
Transfer Printing ◽  
Polyvinylidene Difluoride ◽  
Potential Applications ◽  
Machine Interface ◽  
Electrophysiological Signal ◽  
Printing Processes ◽  
The Internet Of Things

Flexible and stretchable electronics technologies have been attracting increasing attention owing to their potential applications in personal consumed electronics, wearable human–machine interfaces (HMI) and the Internet of Things (IoTs). This paper proposes an HMI based on a polyvinylidene difluoride (PVDF) sensor and laminated it onto the surface of the skin for signal classification and controlling the motion of a mobile robot. The PVDF sensor with ultra-thin stretchable substrate can make conformal contact with the surface of the skin for more accurate measurement of the electrophysiological signal and to provide more accurate control of the actuators. Microelectro-mechanical system (MEMS) technologies and transfer printing processes are adopted for fabrication of the epidermal PVDF sensor. Sensors placed on two wrists would generate two different signals with the fist clenched and loosened. It can be classified into four signals with a combination of the signals from both wrists, i.e. four control modes. Experiments demonstrated that PVDF sensors may be used as an HMI to control the motion of a mobile robot remotely.

Influence of Constructive and Technological Parameters at Generated Spiral Parts with DLP 3D Printing Process

2019 ◽  
Vol 56 (4) ◽  
pp. 801-811
Author(s):  
Mircea Dorin Vasilescu
Keyword(s):  
3D Printing ◽  
Great Influence ◽  
Polymerization Process ◽  
Generation Process ◽  
Technological Parameters ◽  
Printing Process ◽  
The Third ◽  
Solid Models ◽  
Specific Factors ◽  
Printing Processes

This work are made for determine the possibility of generating the specific parts of a threaded assembly. If aspects of CAD generating specific elements was analysed over time in several works, the technological aspects of making components by printing processes 3D through optical polymerization process is less studied. Generating the threaded appeared as a necessity for the reconditioning technology or made components of the processing machines. To determine the technological aspects of 3D printing are arranged to achieve specific factors of the technological process, but also from the specific elements of a trapezoidal thread or spiral for translate granular material in supply process are determined experimentally. In the first part analyses the constructive generation process of a spiral element. In the second part are identified the specific aspects that can generation influence on the process of realization by 3D DLP printing of the two studied elements. The third part is affected to printing and determining the dimensions of the analysed components. We will determine the specific value that can influence the process of making them in rapport with printing process. The last part is affected by the conclusions. It can be noticed that both the orientation and the precision of generating solid models have a great influence on the made parts.

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