The Experts below are selected from a list of 1926 Experts worldwide ranked by ideXlab platform
Sigurdur T Thoroddsen - One of the best experts on this subject based on the ideXlab platform.
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design and fabrication of a pet ptfe based piezoelectric squeeze mode drop on demand inkjet Printhead with interchangeable nozzle
Sensors and Actuators A-physical, 2010Co-Authors: Er Qiang Li, Y.s. Wong, Qian Xu, Sigurdur T ThoroddsenAbstract:Abstract A PET/PTFE-based piezoelectric squeeze mode drop-on-demand inkjet Printhead with interchangeable nozzles is designed and fabricated. The Printhead chamber is comprised of PET (polyethylene terephthalate) tubing or PTFE (polytetrafluoroethylene, or Teflon) tubing, which of a much softer material, than the conventionally used glass tubing. Applying the same electrical voltage, PET/PTFE-based Printhead will generate a larger volume change in the material to be dispensed. The novel Printhead fabricated herein has successfully dispensed liquids with viscosities up to 100 cps, as compared to 20 cps for the commercial Printheads. Furthermore, PTFE-based Printhead provides excellent anti-corrosive property when strongly corrosive inks are involved. The interchangeable nozzle design enables the same Printhead to be fitted with nozzles of different orifice size, thus a clogged nozzle can be easily removed for cleaning or replacement. The characteristics of this novel Printhead are also studied by dispensing glycerin–water solutions.
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Design and fabrication of a PET/PTFE-based piezoelectric squeeze mode drop-on-demand inkjet Printhead with interchangeable nozzle
Sensors and Actuators A-physical, 2010Co-Authors: Er Qiang Li, Yoke San Wong, Qian Xu, Sigurdur T ThoroddsenAbstract:Abstract A PET/PTFE-based piezoelectric squeeze mode drop-on-demand inkjet Printhead with interchangeable nozzles is designed and fabricated. The Printhead chamber is comprised of PET (polyethylene terephthalate) tubing or PTFE (polytetrafluoroethylene, or Teflon) tubing, which of a much softer material, than the conventionally used glass tubing. Applying the same electrical voltage, PET/PTFE-based Printhead will generate a larger volume change in the material to be dispensed. The novel Printhead fabricated herein has successfully dispensed liquids with viscosities up to 100 cps, as compared to 20 cps for the commercial Printheads. Furthermore, PTFE-based Printhead provides excellent anti-corrosive property when strongly corrosive inks are involved. The interchangeable nozzle design enables the same Printhead to be fitted with nozzles of different orifice size, thus a clogged nozzle can be easily removed for cleaning or replacement. The characteristics of this novel Printhead are also studied by dispensing glycerin–water solutions.
Fan-gang Tseng - One of the best experts on this subject based on the ideXlab platform.
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Multi-dimensional data registration CMOS/MEMS integrated inkjet Printhead
Microelectronic Engineering, 2011Co-Authors: Jian-chiun Liou, Fan-gang TsengAbstract:This paper describes our work aimed at developing an integrated multi-dimensional thermal inkjet (TIJ) Printhead with data registration CMOS de-multiplexer utilizing bulk micromachining technology (MEMS). In this experiment, we developed a new structural design for chips used in inkjet Printheads. We designed a thermal inkjet device, whose dimensions could be adjusted to optimize drop generation performance. The energy conversion device and accompanying system were based on an integrated driver head with the performance of a high-frequency, picoliter drop inkjet. The inkjet featured a smart CMOS circuit including D Flip-Flops signal processes along with bi-directional data transfer and 12V power amplifiers in a Printhead chip. All of the jets of the Printhead were controlled by very few input lines, a pulse shape (ENABLE), a data line (DATA), a bit shift clock (BIT SHIFT), a state clearing pulse, 5-volt supply for the logic devices, a higher voltage for energizing the heater resisters, and a ground line. The fabricated backside etching of the thermal inkjet (TIJ) Printhead was measured by open pool and closed pool systems. The starting voltage was measured at 6.5V, and its lifespan was 1.5x10^8.
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Multi-dimensional data registration CMOS/MEMS integrated inkjet Printhead
Microelectronic Engineering, 2011Co-Authors: Jian-chiun Liou, Fan-gang TsengAbstract:This paper describes our work aimed at developing an integrated multi-dimensional thermal inkjet (TIJ) Printhead with data registration CMOS de-multiplexer utilizing bulk micromachining technology (MEMS). In this experiment, we developed a new structural design for chips used in inkjet Printheads. We designed a thermal inkjet device, whose dimensions could be adjusted to optimize drop generation performance. The energy conversion device and accompanying system were based on an integrated driver head with the performance of a high-frequency, picoliter drop inkjet. The inkjet featured a smart CMOS circuit including D Flip-Flops signal processes along with bi-directional data transfer and 12 V power amplifiers in a Printhead chip. All of the jets of the Printhead were controlled by very few input lines, a pulse shape (ENABLE), a data line (DATA), a bit shift clock (BIT SHIFT), a state clearing pulse, 5-volt supply for the logic devices, a higher voltage for energizing the heater resisters, and a ground line. The fabricated backside etching of the thermal inkjet (TIJ) Printhead was measured by open pool and closed pool systems. The starting voltage was measured at 6.5 V, and its lifespan was 1.5 × 108. © 2010 Elsevier B.V. All rights reserved.
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Design and Fabrication of Monolithic Multidimensional Data Registration CMOS/MEMS Ink-Jet Printhead
Journal of Microelectromechanical Systems, 2010Co-Authors: Jian-chiun Liou, Fan-gang Tseng, Chi-ming HuangAbstract:A monolithic ink-jet Printhead is designed and fabricated with back-shooting type of thermal bubble nucleation for high-speed and long-life printing in this paper. It combines micromechanics, including heating actuators, temperature sensor, channels, and nozzles, with an integrated multidimensional data registration CMOS demultiplexer driving circuit, which includes D flip-flop signal processing along with bidirectional data transfer and 12-V power amplifiers in a Printhead chip. Microelectromechanical systems fabrication processes are applied to define the ink-firing chamber, feed channel, and the orifice plate within this new micro injector structure. In this paper, the printing resolution of this monolithic ink-jet head is 1200 dpi, and the diameter of nozzle orifice is about 14 μm with a thickness of 30 μm. Both the silicon dry and wet etching processes are applied to the fabrication of orifice plate with the control of thickness within ±4 μm. The major advantage of the ink-jet chip assembly processes is that throughput is improved. The operating frequency of the monolithic ink-jet Printhead developed in this paper is 24 kHz. The required voltage to start the bubble nucleation of printer head is 7.4 V, and the ink nozzle lifetime is 1.5 × 108. The optimization design of this monolithic ink-jet Printhead could provide better printing quality than the commercial ones.
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An Intelligent High-Speed 3D Data Registration Integrated Circuit Applied to Large Array Format Inkjet Printhead
2006 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 2006Co-Authors: Jian-chiun Liou, Fan-gang TsengAbstract:A novel architecture of high-selection-speed 3D data registration for inkjet application is proposed in this paper. As the increasing demand on the requirement of printing speed and simplicity of data management, inkjet Printheads have been extended in the nozzle numbers from tens to hundreds in the recent years and further to thousands in the future, while intending to maintain data accessing points in the order of 20-40. 3 dimensional data registration scheme to reduce the number of data accessing points as well as the scanning lines for large array inkjet Printhead with nozzle number more than 1000. This IC architecture involves three dimension multiplexing with the provision of a gating transistor for each ink firing resistor, whereby current to an ink firing resistor flows only when its associated gating transistor is selected. Three signals, including selection (S), address (A), and power supply (P), will be employed together to activate a nozzle for droplet ejection. The total numbers of data accessing points will be X = 3 times 3radicY + 1 all of the jets of the Printhead are controlled by 5 input lines with multiplexer data latches and shift registers. The scanning time is reduced up to 30% (the scanning speed is also increased by 3 folds) thanks to the great reduction of the lines for scanning. This device has been designed, fabricated by CMOS 0.35 mum process, and characterized. Experiment results demonstrated the functionality of the fabricated IC in operation, signal transmission and control more than 1000 nozzles with a 5 pl. ink drop volume
R. Hull - One of the best experts on this subject based on the ideXlab platform.
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Direct Focused Ion Beam Writing of Printheads for Pattern Transfer Utilizing Microcontact Printing
MRS Proceedings, 2020Co-Authors: David M. Longo, R. HullAbstract:ABSTRACTWe describe how focused ion beam (FIB) direct write technology may be combined with microcontact printing (μCP) and other pattern transfer techniques to enable nanoscale fabrication of complex patterns over both curved and planar surfaces. Nanoscale Printheads are fabricated by direct sputtering or deposition (Pt or SiO2) in the FIB. These Printheads are capable of transferring 100 nm features over fields of view up to 1 mm2, onto planar and curved surfaces. We are also investigating the concept of “programmable” Printheads by fabrication of individually addressable Printhead arrays, coupled with selective desorption of a relevant transfer medium (e.g. hexadecanethiol self-assembled monolayers) by heating or by application of an electric field
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Microcontact printing: new mastering and transfer techniques for high throughput, resolution and depth of focus
Materials Science and Engineering: C, 2002Co-Authors: R. Hull, Tomas Chraska, David M. LongoAbstract:Abstract We describe techniques for high resolution, high throughput, high depth of focus microcontact printing. Printhead masters are fabricated by focused ion beam (FIB) micro-machining. We describe the instrumental limitations of these techniques, and show how high-resolution features ( 100 μm). We also demonstrate scaling of feature writing rates to >10 4 /s through topographic mastering in PMMA. Microcontact printing resolution is assessed for different elastomer mold materials, and it is shown how rigid polymer composites allow pattern transfer of features finer than 100 nm, such that the current limit in pattern transfer resolution is defined by the grain size in the target Ag film. Finally, we describe an all-polymer microcontact printing process employing elastomer molding from topographically patterned PMMA Printheads.
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Microcontact printing: New mastering and transfer techniques for high throughput, resolution and depth of focus
Materials Science and Engineering C, 2002Co-Authors: R. Hull, Tomas Chraska, Yong Liu, Domenico LongoAbstract:We describe techniques for high resolution high throughputm high depth of focus microcontact printing. Printhead masters are fabricated by focused ion beam (FIB) micro-machining. We describe the instrumental limitations of these techniques, and show how high-resolution features (< 100 nm) maybe maitained over high depths of focus (> 100 μm). We also demonstrates scaling of feature writing rates to > 104through topographic mastering in PMMA. Microcontact resolution is assessed for different elastomer mold materials, and it is shown how rigid polymer composites allow pattern transfer of features finer than 100 nm, such that the current limit in pattern transfer resolution is defined by the grain size in the target Ag film. Finally, we describe an all-polymer microcontact printing process employing elastomer molding from topographically patterned PMMA Printheads. © 2002 Elsevier Science B.V. All rights reserved.
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Deep submicron microcontact printing on planar and curved substrates utilizing focused ion beam fabricated Printheads
Applied Physics Letters, 2001Co-Authors: David M. Longo, Tomas Chraska, W. E. Benson, R. HullAbstract:Focused ion beam (FIB) fabrication of nanostructured “Printheads” is used to extend applications of microcontact printing. Planar and curved Printheads are fabricated with feature sizes less than 100 nm over fields of view of order 1 mm2, and transferred to target substrates with spatial resolution of order 200 nm. Analysis of the mechanical and ion optical stabilities of the FIB demonstrates that several hours of Printhead fabrication time are possible with nanoscale precision. The rapid prototyping capability of this approach and the large depth of focus in the FIB enable rapid nanoscale patterning of a wide range of surface geometries.
Er Qiang Li - One of the best experts on this subject based on the ideXlab platform.
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design and fabrication of a pet ptfe based piezoelectric squeeze mode drop on demand inkjet Printhead with interchangeable nozzle
Sensors and Actuators A-physical, 2010Co-Authors: Er Qiang Li, Y.s. Wong, Qian Xu, Sigurdur T ThoroddsenAbstract:Abstract A PET/PTFE-based piezoelectric squeeze mode drop-on-demand inkjet Printhead with interchangeable nozzles is designed and fabricated. The Printhead chamber is comprised of PET (polyethylene terephthalate) tubing or PTFE (polytetrafluoroethylene, or Teflon) tubing, which of a much softer material, than the conventionally used glass tubing. Applying the same electrical voltage, PET/PTFE-based Printhead will generate a larger volume change in the material to be dispensed. The novel Printhead fabricated herein has successfully dispensed liquids with viscosities up to 100 cps, as compared to 20 cps for the commercial Printheads. Furthermore, PTFE-based Printhead provides excellent anti-corrosive property when strongly corrosive inks are involved. The interchangeable nozzle design enables the same Printhead to be fitted with nozzles of different orifice size, thus a clogged nozzle can be easily removed for cleaning or replacement. The characteristics of this novel Printhead are also studied by dispensing glycerin–water solutions.
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Design and fabrication of a PET/PTFE-based piezoelectric squeeze mode drop-on-demand inkjet Printhead with interchangeable nozzle
Sensors and Actuators A-physical, 2010Co-Authors: Er Qiang Li, Yoke San Wong, Qian Xu, Sigurdur T ThoroddsenAbstract:Abstract A PET/PTFE-based piezoelectric squeeze mode drop-on-demand inkjet Printhead with interchangeable nozzles is designed and fabricated. The Printhead chamber is comprised of PET (polyethylene terephthalate) tubing or PTFE (polytetrafluoroethylene, or Teflon) tubing, which of a much softer material, than the conventionally used glass tubing. Applying the same electrical voltage, PET/PTFE-based Printhead will generate a larger volume change in the material to be dispensed. The novel Printhead fabricated herein has successfully dispensed liquids with viscosities up to 100 cps, as compared to 20 cps for the commercial Printheads. Furthermore, PTFE-based Printhead provides excellent anti-corrosive property when strongly corrosive inks are involved. The interchangeable nozzle design enables the same Printhead to be fitted with nozzles of different orifice size, thus a clogged nozzle can be easily removed for cleaning or replacement. The characteristics of this novel Printhead are also studied by dispensing glycerin–water solutions.
Jian-chiun Liou - One of the best experts on this subject based on the ideXlab platform.
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Multi-dimensional data registration CMOS/MEMS integrated inkjet Printhead
Microelectronic Engineering, 2011Co-Authors: Jian-chiun Liou, Fan-gang TsengAbstract:This paper describes our work aimed at developing an integrated multi-dimensional thermal inkjet (TIJ) Printhead with data registration CMOS de-multiplexer utilizing bulk micromachining technology (MEMS). In this experiment, we developed a new structural design for chips used in inkjet Printheads. We designed a thermal inkjet device, whose dimensions could be adjusted to optimize drop generation performance. The energy conversion device and accompanying system were based on an integrated driver head with the performance of a high-frequency, picoliter drop inkjet. The inkjet featured a smart CMOS circuit including D Flip-Flops signal processes along with bi-directional data transfer and 12V power amplifiers in a Printhead chip. All of the jets of the Printhead were controlled by very few input lines, a pulse shape (ENABLE), a data line (DATA), a bit shift clock (BIT SHIFT), a state clearing pulse, 5-volt supply for the logic devices, a higher voltage for energizing the heater resisters, and a ground line. The fabricated backside etching of the thermal inkjet (TIJ) Printhead was measured by open pool and closed pool systems. The starting voltage was measured at 6.5V, and its lifespan was 1.5x10^8.
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Multi-dimensional data registration CMOS/MEMS integrated inkjet Printhead
Microelectronic Engineering, 2011Co-Authors: Jian-chiun Liou, Fan-gang TsengAbstract:This paper describes our work aimed at developing an integrated multi-dimensional thermal inkjet (TIJ) Printhead with data registration CMOS de-multiplexer utilizing bulk micromachining technology (MEMS). In this experiment, we developed a new structural design for chips used in inkjet Printheads. We designed a thermal inkjet device, whose dimensions could be adjusted to optimize drop generation performance. The energy conversion device and accompanying system were based on an integrated driver head with the performance of a high-frequency, picoliter drop inkjet. The inkjet featured a smart CMOS circuit including D Flip-Flops signal processes along with bi-directional data transfer and 12 V power amplifiers in a Printhead chip. All of the jets of the Printhead were controlled by very few input lines, a pulse shape (ENABLE), a data line (DATA), a bit shift clock (BIT SHIFT), a state clearing pulse, 5-volt supply for the logic devices, a higher voltage for energizing the heater resisters, and a ground line. The fabricated backside etching of the thermal inkjet (TIJ) Printhead was measured by open pool and closed pool systems. The starting voltage was measured at 6.5 V, and its lifespan was 1.5 × 108. © 2010 Elsevier B.V. All rights reserved.
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Design and Fabrication of Monolithic Multidimensional Data Registration CMOS/MEMS Ink-Jet Printhead
Journal of Microelectromechanical Systems, 2010Co-Authors: Jian-chiun Liou, Fan-gang Tseng, Chi-ming HuangAbstract:A monolithic ink-jet Printhead is designed and fabricated with back-shooting type of thermal bubble nucleation for high-speed and long-life printing in this paper. It combines micromechanics, including heating actuators, temperature sensor, channels, and nozzles, with an integrated multidimensional data registration CMOS demultiplexer driving circuit, which includes D flip-flop signal processing along with bidirectional data transfer and 12-V power amplifiers in a Printhead chip. Microelectromechanical systems fabrication processes are applied to define the ink-firing chamber, feed channel, and the orifice plate within this new micro injector structure. In this paper, the printing resolution of this monolithic ink-jet head is 1200 dpi, and the diameter of nozzle orifice is about 14 μm with a thickness of 30 μm. Both the silicon dry and wet etching processes are applied to the fabrication of orifice plate with the control of thickness within ±4 μm. The major advantage of the ink-jet chip assembly processes is that throughput is improved. The operating frequency of the monolithic ink-jet Printhead developed in this paper is 24 kHz. The required voltage to start the bubble nucleation of printer head is 7.4 V, and the ink nozzle lifetime is 1.5 × 108. The optimization design of this monolithic ink-jet Printhead could provide better printing quality than the commercial ones.
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An Intelligent High-Speed 3D Data Registration Integrated Circuit Applied to Large Array Format Inkjet Printhead
2006 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 2006Co-Authors: Jian-chiun Liou, Fan-gang TsengAbstract:A novel architecture of high-selection-speed 3D data registration for inkjet application is proposed in this paper. As the increasing demand on the requirement of printing speed and simplicity of data management, inkjet Printheads have been extended in the nozzle numbers from tens to hundreds in the recent years and further to thousands in the future, while intending to maintain data accessing points in the order of 20-40. 3 dimensional data registration scheme to reduce the number of data accessing points as well as the scanning lines for large array inkjet Printhead with nozzle number more than 1000. This IC architecture involves three dimension multiplexing with the provision of a gating transistor for each ink firing resistor, whereby current to an ink firing resistor flows only when its associated gating transistor is selected. Three signals, including selection (S), address (A), and power supply (P), will be employed together to activate a nozzle for droplet ejection. The total numbers of data accessing points will be X = 3 times 3radicY + 1 all of the jets of the Printhead are controlled by 5 input lines with multiplexer data latches and shift registers. The scanning time is reduced up to 30% (the scanning speed is also increased by 3 folds) thanks to the great reduction of the lines for scanning. This device has been designed, fabricated by CMOS 0.35 mum process, and characterized. Experiment results demonstrated the functionality of the fabricated IC in operation, signal transmission and control more than 1000 nozzles with a 5 pl. ink drop volume
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A bubble-jet MEMS Printhead integrated with CMOS de-multiplexer
2004 IEEE SEMI Advanced Semiconductor Manufacturing Conference and Workshop (IEEE Cat. No.04CH37530), 2004Co-Authors: Jian-chiun Liou, Chun-jung ChenAbstract:This paper describes the work aimed to develop a thermal inkjet (TIJ) Printhead by using bulk micromachining technology (MEMS). This experiment develops new structure designs of chip for inkjet Printheads. A thermal inkjet device is designed, several of the dimensions may be adjusted just a few microns to change or optimize the drop generation performance. This energy conversion devices and systems based on integrated driver head with the performance of high-frequency and picoliter drop Inkjet and structures. A smart CMOS circuit including D Flip-Flops signal-processing along with bi-directional data transfer and 12 V power amplifiers in a Printhead chip. All of the jets of the Printhead are controlled by very few input lines: a pulse shape (ENABLE), a data line (DATA), a bit shift clock (BIT SHIFT), a clearing pulse, 5-volt supply for the logic devices, a higher voltage for energizing the heater resisters, and a ground line. The fabricated back side etching thermal inkjet (TIJ) Printhead is measured by open pool and close pool system. The measured begin voltage is 6.5 V, life time is 9/spl times/107.