A novel process for continuous thermal embossing of large‐area nanopatterns onto polymer films

Fagan, Matthew D.; Kim, Byung H.; Yao, Donggang

doi:10.1002/adv.20167

Cited by 38 publications

(35 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The system can be operated stably at a high take-up speed exceeding 10 m/min. This rate is considerably higher than that previously reported by the authors [10] on a thermal roller-imprinting system. These results seem promising in that microfeatures can be successfully replicated by a robust and scalable industrial process suitable for large-area, continuous production.…”

Section: Experimental Investigationcontrasting

confidence: 61%

“…Besides contact heating, active heating methods can also be utilized to heat the belt mold. Fagan et al [10] demonstrated that a belt mold can be rapidly heated by induction heating, and a temperature difference of more than 200 °C can be achieved in continuous roller imprinting. With this imprinting system, they were able to replicate both micrometer and sub-micrometer patterns at a film feed speed exceeding 1.5 m/min.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extrusion Roller Imprinting with a Variotherm Belt Mold

2014

Self Cite

View full text Add to dashboard Cite

Although many precision fabrication techniques have demonstrated the ability to produce microstructures and micro-devices with sub 100 nm accuracy, we are yet to see a scalable manufacturing process for large-area production. One promising solution to scalable micro-and nanofabrication is thermal roller imprinting. However, existing investigations on thermal roller imprinting revealed poor pattern transfer fidelity, especially for high aspect ratio features. The standard roller imprinting process suffers from the lack of an effective holding and cooling stage so that the adverse effects from the viscoelastic nature of polymers are not managed. To rectify this problem and further improve the production rate, a new extrusion roller imprinting process with a variotherm belt mold is designed, and its prototype was established at a laboratory scale. The process testing results demonstrate that a 30 μm sawtooth pattern can be faithfully transferred to extruded polyethylene film at take-up speeds higher than 10 m/min. The results are promising in that microfeatures or even nanofeatures may be successfully replicated by a robust and scalable industrial process suitable for large-area, continuous production.

show abstract

Section: Experimental Investigationcontrasting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Extrusion Roller Imprinting with a Variotherm Belt Mold

2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…[ 103,111 ] Molding is also compatible with roll-to-roll manufacturing, but the fl ow rate into the mold pattern and curing speed is a critical factor in determining the maximum throughput speed. [ 104 ] Solution processing can even be integrated with textile substrates, which are conformal and robust. However due to the high roughness and porosity of textiles, they are best suited for devices that require thick active layers such as batteries.…”

Section: Reviewmentioning

confidence: 99%

Monitoring of Vital Signs with Flexible and Wearable Medical Devices

et al. 2016

View full text Add to dashboard Cite

Advances in wireless technologies, low-power electronics, the internet of things, and in the domain of connected health are driving innovations in wearable medical devices at a tremendous pace. Wearable sensor systems composed of flexible and stretchable materials have the potential to better interface to the human skin, whereas silicon-based electronics are extremely efficient in sensor data processing and transmission. Therefore, flexible and stretchable sensors combined with low-power silicon-based electronics are a viable and efficient approach for medical monitoring. Flexible medical devices designed for monitoring human vital signs, such as body temperature, heart rate, respiration rate, blood pressure, pulse oxygenation, and blood glucose have applications in both fitness monitoring and medical diagnostics. As a review of the latest development in flexible and wearable human vitals sensors, the essential components required for vitals sensors are outlined and discussed here, including the reported sensor systems, sensing mechanisms, sensor fabrication, power, and data processing requirements.

show abstract

“…Among the master materials for imprinting on glass, nickel alloy is considered more suitable as master material (Fagan et al 2010). With incorporation of other elements such as iron, copper, cobalt or manganese, the nickel alloys exhibit not only, high hardness and strength, but also high resistance to corrosion and low thermal expansion which has great contribution to avoiding deformation during imprinting (Cao et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of large-area microfluidics structures on glass by imprinting and diode-pumped solid state laser writing techniques

Chen

Maccioni

et al. 2011

Microsyst Technol

View full text Add to dashboard Cite

A micro structured master prototype for imprint lithography in glass has been successfully fabricated by using a Q-switched Nd:YVO 4 Diode-pumped solid state laser writing in Nickel-based alloy. The micro-structures in the prototype were characterized using an optical microscope, scanning electron microscopy, surface profilometer and field emission scanning electron microscopy. The surface quality of the fabricated master prototype was further improved through the process of polishing and cleaning. Then the master prototype was used for imprinting a soda lime glass substrate under the optimized imprinting conditions that have been previously studied for lab-on-chip devices. The results showed that very good quality transfer of the micro structures from the prototype master to the glass substrate was obtained.

show abstract

A novel process for continuous thermal embossing of large‐area nanopatterns onto polymer films

Cited by 38 publications

References 37 publications

Extrusion Roller Imprinting with a Variotherm Belt Mold

Extrusion Roller Imprinting with a Variotherm Belt Mold

Monitoring of Vital Signs with Flexible and Wearable Medical Devices

Fabrication of large-area microfluidics structures on glass by imprinting and diode-pumped solid state laser writing techniques

Contact Info

Product

Resources

About