Investigation to minimize heater burnout in thermal thin film print heads

Park, J.-H.; Oh, Youjin

doi:10.1007/s00542-004-0431-2

Cited by 7 publications

(8 citation statements)

References 15 publications

(6 reference statements)

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“…Since the central disadvantage of the thermal printhead is its shorter lifetime [20][21][22][23], the isolation of failure mechanisms and the design of more robust resistors would create a greater incentive for production and manufacturing. Park et al and Lim et al' researches [24,25] present studies on the subject of lifetime enhancement by changing the printhead micro structure and changing the metal composition and thickness of the resistor. McGlone et al' research [26] describes more than 10 7 pulses obtained by the use of amorphous metal thin films.…”

Section: Introductionmentioning

confidence: 99%

Thin-Film MEMS Resistors with Enhanced Lifetime for Thermal Inkjet

2020

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In this paper, the failure mechanisms of the thermal inkjet thin-film resistors are recognized. Additionally, designs of resistors to overcome these mechanisms are suggested and tested by simulation and experiment. The resulting resistors are shown to have improved lifetimes, spanning an order of magnitude up to 2 × 109 pulses. The thermal failure mechanisms were defined according to the electric field magnitude in three critical points—the resistor center, the resistor–conductor edge, and the resistor thermal “hot spots”. Lowering the thermal gradients between these points will lead to the improved lifetime of the resistors. Using MATLAB PDE simulations, various resistors shapes, with different electric field ratios in the hot spots, were designed and manufactured on an 8″ silicon wafer. A series of lifetime experiments were conducted on the resistors, and a strong relation between the shape and the lifetime of the resistor was found. These results have immediate ramifications regarding the different printing apparatuses which function with thermal inkjet technology, allowing the commercial production of larger thermal printheads with high MTBF rate. Such heads may fit fast and large 3D printers.

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Section: Introductionmentioning

confidence: 99%

Thin-Film MEMS Resistors with Enhanced Lifetime for Thermal Inkjet

2020

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“…It does not require the use of photomask, process simplification, material utilization, low cost and more environmentally friendly. Jetting technology is a widely used technology [1][2][3][4][5][6][7][8][9][10][11][12]. The principle of ink-jet technology is mainly that the liquid in the chamber is squeezed by an Actuator so that the liquid is squeezed by the pressure to be ejected through the spray hole.…”

Section: Introductionmentioning

confidence: 99%

Precisely Addressed (DNA Gene) Spray Microfluidic Chip Technology

Liou¹

2018

Microfluidics and Nanofluidics

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This study is the subject of precisely addressed (DNA Gene) spray microfluidic chip. It is a special chip (ASIC) designed to spray liquid medical wisdom DNA gene sequencing system technology transfer fabric onto the glass slide. Thermal bubble liquid bead generation, it produces a very large thrust bubble in a short time to launch the liquid. It forms micro-droplets. It is in the biomedical micro-beads quantitative, it uses the address spray liquid crystal structure of the cavity. It uses the principle of ink-jet printer cloth DNA liquid onto glass slides. It does DNA sorting for each style. Bubble inkjet technology is in the inkjet head position on the wall with heating electrodes. It is by pulsing the selected heating element by electrical pulses. It produces ink droplets on the inkjet head. It is heated to a certain temperature after the electrode. It makes the droplet a tiny bubble and explodes. It is then discharged through the heating chamber through the inkjet head. It is attached to the substrate surface. It is printed on the amount of ink droplets depends on the temperature control of the heating device.

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“…Inkjet technology increases the stability of the droplet color to achieve both high-speed and high-quality printing [ 1 , 2 , 3 , 4 , 5 , 6 ], in which the ink droplets have uniform size and shape, and the consistency of the ink concentration enhances the image quality. However, at high temperatures, it is difficult to control the direction and shape of the ink droplets [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ], and high-precision control of the droplets is crucial to achieve high-quality printed products. Thermal inkjet (TIJ) printing forces the ink into a tiny capillary.…”

Section: Introductionmentioning

confidence: 99%

Investigation of CMOS Multiplexer Jet Matrix Addressing and Micro-Droplets within a Printhead Chip

Liou

Yang

2017

Micromachines

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In this study, we demonstrate and investigate a new droplet injection design. We create a thermal inkjet (TIJ) printhead using an application-specific integrated circuit system and bulk micromachining technology (microelectromechanical systems). We design inkjet printhead chips with a new structure and investigate their properties. For the new structure, the integration of complementary metal-oxide-semiconductors (MOSs) and enhancement-mode devices, as well as power switches and a TIJ heater transducer, enables logic functions to be executed on-chip. This capability is used in the proposed design to address individual jets with even fewer input lines than in matrix addressing. A high number of jets (at least 896) can be addressed with only 11 input lines. E1 (Enable 1) and E2 (Enable 2) are set up dependently, and they have the ability to reverse their signals in relation to each other (i.e., if E1 is disabled, E2 is enabled and vice versa). The E1 and E2 signals each service 448 jets. If one of the MOSs is turned on, then it corresponds to a power line with a similar function. If an addressing gate terminal of the other MOS has a discharge action, then we can control a different heater to generate heating bubbles in the jet inks. The operating frequency for addressing these measurements is 18 kHz in normal mode, 26 kHz in draft mode, and 16 kHz in best mode.

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Investigation to minimize heater burnout in thermal thin film print heads

Cited by 7 publications

References 15 publications

Thin-Film MEMS Resistors with Enhanced Lifetime for Thermal Inkjet

Thin-Film MEMS Resistors with Enhanced Lifetime for Thermal Inkjet

Precisely Addressed (DNA Gene) Spray Microfluidic Chip Technology

Investigation of CMOS Multiplexer Jet Matrix Addressing and Micro-Droplets within a Printhead Chip

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