The electrical sintering and fusing effects of Aerosol-Jet printed silver conductive line

2019 ◽  
Vol 246 ◽  
pp. 5-8 ◽  
Author(s):  
Chao He ◽  
Ning Jin ◽  
Haoran Yu ◽  
Jian Lin ◽  
Chang-Qi Ma
Keyword(s):  
Conductive Line

Test Method of Current Leakage for Dielectric Paste

2012 ◽  
Vol 220-223 ◽  
pp. 1573-1576
Author(s):  
Zhi Hong Hou
Keyword(s):  
Glass Substrate ◽  
Dielectric Layer ◽  
Screen Printing ◽  
Test Method ◽  
Conducting Layer ◽  
Current Leakage ◽  
Test Circuit ◽  
Conductive Line ◽  
Hybrid Microcircuit ◽  
Sintering Processes

A test method of current leakage for dielectric paste was proposed by simulating the application processes of dielectric paste for manufacturing the dielectric layer in the multilayer thick film hybrid microcircuit. That is, by screen printing and sintering processes, the sliver conducting layer was fabricated on the surface of glass substrate, and then dielectric layer, finally the glass substrate sample with conducting layer and dielectric layer was dipped in 5 Wt% NaCl aqueous solution. The conductive line was soldered on the silver conducting layer to form the test circuit, and powered with 5 volts direct power, the current in the test circuit was taken as the current leakage of the dielectric paste. The method may be used to evaluate the current leakage of dielectric paste.

Improving Performance of Laser-Printed Conductive Silver Lines

2012 ◽  
Vol 2012 (CICMT) ◽  
pp. 000377-000384
Author(s):  
Dustin Büttner ◽  
Klaus Krüger
Keyword(s):  
Thick Film ◽  
Screen Printing ◽  
Printed Electronics ◽  
Production Method ◽  
Silver Particles ◽  
Ceramic Substrates ◽  
High Speeds ◽  
Conductive Line ◽  
Ink Jet ◽  
Jet Printing

Within the last decade, large efforts were made to implement digital printing as a production method for printed electronics. Especially in production of thick-film electronics, innovation is pushed forward to overcome the lacks of established screen-printing regarding flexibility and tooling. Besides the numerous approaches in using ink-jet printing for printed electronics, researchers at Helmut Schmidt University already showed huge progress in applying electrophotography (“laser printing”) as a method to print conductive silver lines in order to form a conductive layout for thick-film circuits. Electrophotography is a solvent-free method, able to directly print silver toner onto ceramic substrates, forming a conductive line after firing. Benefits are high speeds and flexibility and a huge potential regarding precision. Now, after the feasibility of the method was proven and even functional conductive layouts like RFID coils were printed, the next steps have to be taken towards developing electrophotography to an applicable method in a thick-film production process. Thus, this paper describes the efforts in improving the method's performance. Different kinds of silver particles are tested towards their possibility of forming a silver toner. The resulting silver lines are examined regarding conductivity and printing precision. Also, surface treatment of substrates is considered as a method to reduce the number of required print cycles. Corresponding tests are performed. Furthermore, different firing profiles are tested towards their influence onto the resulting silver lines. Combining the results of these examinations, the performance of conductive silver lines could be improved significantly.

Study on Direct Writing Thin Film Conductive Line Using Pulse Fiber Laser

2010 ◽  
Vol 37 (12) ◽  
pp. 3196-3200
Author(s):  
李晓刚 Li Xiaogang ◽  
陈继民 Chen Jimin ◽  
刘富荣 Liu Furong
Keyword(s):  
Thin Film ◽  
Fiber Laser ◽  
Direct Writing ◽  
Conductive Line

scholarly journals A Simple, Reusable and Low-Cost LVDT-Based in Situ Bolt Preload Monitoring System during Fastening for a Truck Wheel Assembly

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 336
Author(s):  
Shin Jang ◽  
Juhyun Nam ◽  
Samgon Lee ◽  
Je Oh
Keyword(s):  
Monitoring System ◽  
Low Cost ◽  
Carbon Paste ◽  
Element Analysis ◽  
Bolt Preload ◽  
Resistance Variation ◽  
Conductive Line ◽  
System L ◽  
Measurement Results

The aim of this study is to design and test a new, simple, and reusable linear variable differential transformer (LVDT)-based in situ bolt preload monitoring system (L-PMS) during fastening of a truck wheel assembly. Instead of measuring the elongation of a bolt, the distance between the end surfaces of both the bolt and nut was monitored via the L-PMS. The distance obtained from the L-PMS was experimentally correlated with the actual preload measured by a washer-type load cell. Since the variation of the distance is related to the stiffness of the bolt and clamped parts, a finite element analysis was also conducted to predict the sensitivity of L-PMS. There was a strong linear relationship between the distance and bolt preload after the bolt and nut were fully snugged. However, a logarithm-shaped nonlinear relationship was irregularly observed before getting snugged, making it difficult to define a clear relationship. In order to tackle this issue, an arc-shaped conductive line was screen-printed onto the surface of the clamped parts using a conductive carbon paste. The results show that a resistance variation of the conductive line during fastening enables to determine the snug point, so the L-PMS combined with resistance measurement results in an approximately ±6% error in the measurement of bolt preload. The proposed L-PMS offers a simple but highly reliable way for measuring bolt preload during fastening, which could be utilized in a heavy-truck production line.

Fine Micro Patterning of Conductive Line by Using Direct Inkjet Printing

2006 ◽  
Vol 326-328 ◽  
pp. 257-260 ◽  
Author(s):  
Sung Jun Park ◽  
Shang Hoon Seo ◽  
Jae Woo Joung
Keyword(s):  
Inkjet Printing ◽  
Conductive Ink ◽  
Drop On Demand ◽  
Micro Patterning ◽  
Bipolar Voltage ◽  
Conductive Line ◽  
Voltage Signal ◽  
Velocity Deviation ◽  
Placement Accuracy ◽  
Metallization Process

A novel selective metallization process to fabricate the fine conductive line based on drop-on-demand (DoD) inkjet printing was studied. Direct inkjet printing is an alternative and costeffective technology for patterning and fabricating objects directly from design or image files without making masks and patterns. The conductive ink used in this experiment consists of 1 to 50 nm silver particles that are homogeneously suspended in an organic carrier. A piezo-electric inkjet print head driven by a bipolar voltage signal is used to dispense 20-40μm diameter droplets. Repeatability of circuitry fabrication is closely related to the formation of steady, satellite-free droplets. Therefore, the ability to form small and stable droplets with a same size, constant velocity and the correct flight angle must be taken into consideration for fine and precise conductive lines. In this study, parameters affecting the pattern formation such as drop formation, drop placement accuracy and velocity deviation between each nozzle have been investigated. As a result, direct inkjet patterning systems equipped with several functioning modules and fine metallic patterns have been developed.

Flexoelectric Vibration Control of Plates by Line Electrodes

2016 ◽  
Author(s):  
X. F. Zhang ◽  
H. Y. Li ◽  
H. S. Tzou
Keyword(s):  
Electric Field ◽  
Vibration Control ◽  
Bottom Surface ◽  
Modal Control ◽  
Sensors And Actuators ◽  
Structural Dynamic ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Flexoelectric Effect ◽  
Conductive Line

The electric polarization induced by the strain gradient is the direct flexoelectric effect; the mechanical stress/strain induced by the electric field gradient is the converse flexoelectric effect. Accordingly, flexoelectric sensors and actuators are respectively designed to monitor the structural dynamic behavior and to control the structural vibration. In this study, a line-electrode induced flexoelectric actuation is designed to control the plate vibrations. A flexoelectric layer laminated on the thin plate is used as a distributed actuator. The bottom surface of the flexoelectric actuator is a common electrode and the top surface is driven by a conductive line to generate an inhomogeneous electric field. Based on the converse flexoelectric effect, the electric filed gradient induces mechanical stresses in the flexoelectric layer resulting in induced bending moments to the plate structure. With the control moment imposed on the plate, flexoelectric vibration control of the plate is evaluated in this study. The objective of this study is to explore the modal control effects of the plate by the conductive line excitation. For a plate with two opposite sides simply supported and the other two are free (SS-F-SS-F), vibration control response of the plate is studied when the conductive line locates parallel to the y width direction. Then, independent modal control effects (i.e., the induced or controllable displacements by the flexoelectric actuator) are evaluated for the modes (1,1), (1,2), (1,3), (2,1) and (3,1) with different line actuation locations. Control effects of the conductive line location to various plate modes are explored and results show that the optimal conductive line location differs for different plate modes. When the FF width decreases to far less than the SS length, the SS-F-SS-F plate is degraded to a simply supported beam. Then, control effects for modes (1,1), (2,1) and (3,1) with different conductive line locations are discussed. The results are compared with the control effect derived directly by the simply supported beam theory. Thus, this study suggests that plate vibration can be controlled by the line-electrode induced converse flexoelectric effect. Conductive line locations are critical to control of various plate modes.

Study of the optimization of embroidery design parameters for the Technical Embroidery Machine: derivation of the correlation between thread consumption and electrical resistance

2021 ◽  
pp. 004051752110610
Author(s):  
Soo Hyeon Rho ◽  
Suhyun Lee ◽  
Wonyoung Jeong ◽  
Dae-Young Lim
Keyword(s):  
Textile Industry ◽  
Equivalent Circuit Model ◽  
Data Communication ◽  
Design Parameters ◽  
Electrical Characteristics ◽  
Smart Textile ◽  
Conductive Line ◽  
The Given ◽  
Line Resistance ◽  
Textile Products

The smart textile industry has become increasingly interested in textile products with electronic functions. In these smart textile products, sensing and data communication are conducted through conductive circuits by conductive threads. In embroidery technology that uses conductive threads as the material for the conductive line as a circuit, their resistance is an important factor when designing a product. The main purpose of this study was to derive an equivalent circuit model and a calculation equation for the consumption of conductive threads according to the embroidery design parameters. The effects of the embroidery design parameters on the appearance and electrical characteristics of the conductive line were also analyzed. The appearance and electrical characteristics of the embroidered conductive line were different when the embroidery design parameters were not the same. The calculation equation for the consumption of conductive threads could establish a quantitative system that could indicate the line resistance of an embroidered conductive line using the embroidery design parameters and the given thread resistance.

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