Design and fabrication of screen printed microheater

Tiwari, Shobhit; Bhat, Somashekara; Mahato, Krishna Kishore

doi:10.1007/s00542-018-3821-6

Cited by 16 publications

(12 citation statements)

References 14 publications

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“…The thermal convection loss integrated into the lab-on-chip fabricated device can be reduced, with an analysis of the contact resistance between the pads and the cables of the attached sensors and a better understanding on the heat transfer process. For instance, Jiang [ 12 ], Byers [ 21 ], and Tiwari [ 22 ] used a time response of the temperature for a specified provided voltage, which can be very useful to describe the transient thermal analysis [ 3 ]. In the work of Jiang [ 12 ], this temporal curve characterization with hysteresis was developed, showing the fluid heating response for a provided pulsating power between 0.2 W and 3.2 W, and a flow rate of 4 mL/min, demonstrating the rapid heat transfer process when a liquid flow is applied, which, although not considered in that work, provides a key characteristic for use in microsystem flow sensors.…”

Section: Discussionmentioning

confidence: 99%

“…Diverse approaches have been used to date for fabricating microheaters; for example, Byers [ 22 ] and Tiwari [ 23 ] presented printed microheaters, in both cases, using COMSOL for modeling temperature and voltage distributions, which achieved temperatures up to 67 °C and 100 °C, respectively. In the case of PVD microheaters, Scorzoni [ 20 ] showed a similar method to the current work, using PVD to attain a Cr/Al/Cr resistive thin film.…”

Section: Discussionmentioning

confidence: 99%

“…An adequate characterization process on a heating system gives more precise results in the operating temperature [ 19 , 20 , 21 ]. For instance, in the works published by Scorzoni [ 20 ], Byers [ 21 ], and Tiwari [ 22 ], different designs for printed microheaters were presented, using COMSOL for modeling temperature and voltage distributions, highlighting the advantages of implementing electrothermal simulations to compare and analyze the characterization process on a heating system.…”

Section: Introductionmentioning

confidence: 99%

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Design, Simulation, and Fabrication of a Copper–Chrome-Based Glass Heater Integrated into a PMMA Microfluidic System

2021

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In this paper, the development of a copper–chrome-based glass microheater and its integration into a Polymethylmethacrylate (PMMA) microfluidic system are presented. The process highlights the importance of an appropriate characterization, taking advantage of computer-simulated physical methods in the heat transfer process. The presented system architecture allows the integration for the development of a thermal flow sensor, in which the fluid flows through a 1 mm width × 1 mm length microchannel across a 5 mm width × 13 mm length heating surface. Using an electrothermal analysis, based on a simulation and design process, the surface heating behavior curve was analyzed to choose a heating reference point, primarily used to control the temperature point within the fluidic microsystem. The heater was characterized using the theory of electrical instrumentation, with a 7.22% error for the heating characterization and a 5.42% error for the power consumption, measured at 0.69 W at a temperature of 70 °C. Further tests, at a temperature of 115 °C, were used to observe the effects of the heat transfer through convection on the fluid and the heater surface for different flow rates, which can be used for the development of thermal flowmeters using the configuration presented in this work.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design, Simulation, and Fabrication of a Copper–Chrome-Based Glass Heater Integrated into a PMMA Microfluidic System

2021

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“…These results can provide guidelines to get high-efficiency flexible microheaters for different applications. [18].…”

Section: Introductionmentioning

confidence: 99%

Design and Thermal Analysis of Flexible Microheaters

Ruan

Chen

et al. 2022

Micromachines

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With the development of flexible electronics, flexible microheaters have been applied in many areas. Low power consumption and fast response microheaters have attracted much attention. In this work, systematic thermal and mechanical analyses were conducted for a kind of flexible microheater with two different wire structures. The microheater consisted of polyethylene terephthalate (PET) substrate and copper electric wire with graphene thin film as the middle layer. The steady-state average temperature and heating efficiency for the two structures were compared and it was shown that the S-shaped wire structure was better for voltage-controlled microheater other than circular-shaped structure. In addition, the maximum thermal stress for both structures was from the boundary of microheaters, which indicated that not only the wire structure but also the shape of micro heaters should be considered to reduce the damage caused by thermal stress. The influence resulting from the thickness of graphene thin film also has been discussed. In all, the heating efficiency for flexible microheaters can be up to 135 °C/W. With the proposed PID voltage control system, the response time for the designed microheater was less than 10 s. Moreover, a feasible fabrication process flow for these proposed structures combing thermal analysis results in this work can provide some clues for flexible microheaters design and fabrication in other application areas.

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“…Considering the relatively new and evolving topic of printed flexible heaters, [ 21 ] there is only a couple of research going on, for instance, in the area of screen printed heaters based on silver, [ 22,23 ] silver nanowire, [ 24 ] or poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate [PEDOT–PSS] silver nanowire composite. [ 25 ] Other methods are spray coating of Ag nanowire/carbon nanotube composites [ 26 ] or patterned casting of Ag on flexible polymer foil .…”

Section: Introductionmentioning

confidence: 99%

Inkjet Printed Heating Elements Based on Nanoparticle Silver Ink with Adjustable Temperature Distribution for Flexible Applications

Mitra

Thalheim

Zichner

2021

Physica Status Solidi (a)

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This article reports on developments in the manufacturing of heating elements by means of digital inkjet printing technology. The area coverage of the meander lines ranges from 34 lpi (lines per inch) to 51 and 102 lpi, which mainly influences the temperature distribution and homogeneity. Furthermore, the line width of the meander lines is varied between 250, 500, and 1000 μm. All heating elements are deposited by single‐pass printing of a nanoparticle silver ink with subsequent thermal sintering on a standard flexible polymer film, to demonstrate that inkjet printing allows the manufacturing of printed thin devices also on low‐cost material. The implementation of various designs allows the control of the temperature distribution and heat development. The printed structures are evaluated regarding their optical and electrical characteristics and their thermal performance is assessed using an infrared camera. This research has succeeded in developing bendable printed heaters, which reach homogeneous average temperature of 100 °C over an area of approximately 15 cm2 at a power supply of 12 V. The feasibility of the inkjet printed heaters is demonstrated by a long‐term test over several days with negligible fluctuations in the area temperature and highest stability in the resistance.

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Design and fabrication of screen printed microheater

Cited by 16 publications

References 14 publications

Design, Simulation, and Fabrication of a Copper–Chrome-Based Glass Heater Integrated into a PMMA Microfluidic System

Design, Simulation, and Fabrication of a Copper–Chrome-Based Glass Heater Integrated into a PMMA Microfluidic System

Design and Thermal Analysis of Flexible Microheaters

Inkjet Printed Heating Elements Based on Nanoparticle Silver Ink with Adjustable Temperature Distribution for Flexible Applications

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