Backlight device fabricated by roll-to-roll nanoimprinting

Tapio Mäkelä, Tomi Haatainen, Jouni Ahopelto, Jori Oravasaari, Tero Tuohioja, Kari Rinko

Research output: Contribution to conferenceConference articleScientific

Abstract

In the high volume manufacturing long term stability of process the parameters is essential. In this work we demonstrate the fabrication of backlight device on 50 mm wide and 95 micron thick cellulose acetate (CA) web (from Clarifoil). Optical binary grating design and Ni-mold were produced by Modines Ltd. The fabrication process for flexible Ni-master is shown e.g. in ref. The size of backlight structure is 30 mm x 60 mm consisting a blocks of 5 micron wide cavities as shown in Fig. 1. More than 500 devices was printed on CA-film in continuous roll-to-roll process. Printing speed was varied from 0.1 to 1.0 m/min when temperature was maximized at 118 oC, which is close to the glass transition temperature (125 oC) of CA film. Pressure of ca. 20 MPa was applied in the process. These parameters were optimized for continuous printing process. Higher temperatures or pressures can lead to a break of the web, which prevents continuous processing. In this process we have used a custom made nanoimprinter device.
Original languageEnglish
Publication statusPublished - 2010
MoE publication typeNot Eligible
Event36th International Conference on Micro- and Nano-Engineering, MNE 2010 - Genoa, Italy
Duration: 19 Sep 201022 Sep 2010

Conference

Conference36th International Conference on Micro- and Nano-Engineering, MNE 2010
Abbreviated titleMNE 2010
CountryItaly
CityGenoa
Period19/09/1022/09/10

Fingerprint

cellulose
acetates
printing
fabrication
glass transition temperature
manufacturing
gratings
cavities
temperature

Keywords

  • roll-to-roll
  • nanoimprinting
  • NIL, backlight

Cite this

Mäkelä, T., Haatainen, T., Ahopelto, J., Oravasaari, J., Tuohioja, T., & Rinko, K. (2010). Backlight device fabricated by roll-to-roll nanoimprinting. Paper presented at 36th International Conference on Micro- and Nano-Engineering, MNE 2010, Genoa, Italy.
Mäkelä, Tapio ; Haatainen, Tomi ; Ahopelto, Jouni ; Oravasaari, Jori ; Tuohioja, Tero ; Rinko, Kari. / Backlight device fabricated by roll-to-roll nanoimprinting. Paper presented at 36th International Conference on Micro- and Nano-Engineering, MNE 2010, Genoa, Italy.
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abstract = "In the high volume manufacturing long term stability of process the parameters is essential. In this work we demonstrate the fabrication of backlight device on 50 mm wide and 95 micron thick cellulose acetate (CA) web (from Clarifoil). Optical binary grating design and Ni-mold were produced by Modines Ltd. The fabrication process for flexible Ni-master is shown e.g. in ref. The size of backlight structure is 30 mm x 60 mm consisting a blocks of 5 micron wide cavities as shown in Fig. 1. More than 500 devices was printed on CA-film in continuous roll-to-roll process. Printing speed was varied from 0.1 to 1.0 m/min when temperature was maximized at 118 oC, which is close to the glass transition temperature (125 oC) of CA film. Pressure of ca. 20 MPa was applied in the process. These parameters were optimized for continuous printing process. Higher temperatures or pressures can lead to a break of the web, which prevents continuous processing. In this process we have used a custom made nanoimprinter device.",
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Mäkelä, T, Haatainen, T, Ahopelto, J, Oravasaari, J, Tuohioja, T & Rinko, K 2010, 'Backlight device fabricated by roll-to-roll nanoimprinting' Paper presented at 36th International Conference on Micro- and Nano-Engineering, MNE 2010, Genoa, Italy, 19/09/10 - 22/09/10, .

Backlight device fabricated by roll-to-roll nanoimprinting. / Mäkelä, Tapio; Haatainen, Tomi; Ahopelto, Jouni; Oravasaari, Jori; Tuohioja, Tero; Rinko, Kari.

2010. Paper presented at 36th International Conference on Micro- and Nano-Engineering, MNE 2010, Genoa, Italy.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

T1 - Backlight device fabricated by roll-to-roll nanoimprinting

AU - Mäkelä, Tapio

AU - Haatainen, Tomi

AU - Ahopelto, Jouni

AU - Oravasaari, Jori

AU - Tuohioja, Tero

AU - Rinko, Kari

N1 - Project code: 21975

PY - 2010

Y1 - 2010

N2 - In the high volume manufacturing long term stability of process the parameters is essential. In this work we demonstrate the fabrication of backlight device on 50 mm wide and 95 micron thick cellulose acetate (CA) web (from Clarifoil). Optical binary grating design and Ni-mold were produced by Modines Ltd. The fabrication process for flexible Ni-master is shown e.g. in ref. The size of backlight structure is 30 mm x 60 mm consisting a blocks of 5 micron wide cavities as shown in Fig. 1. More than 500 devices was printed on CA-film in continuous roll-to-roll process. Printing speed was varied from 0.1 to 1.0 m/min when temperature was maximized at 118 oC, which is close to the glass transition temperature (125 oC) of CA film. Pressure of ca. 20 MPa was applied in the process. These parameters were optimized for continuous printing process. Higher temperatures or pressures can lead to a break of the web, which prevents continuous processing. In this process we have used a custom made nanoimprinter device.

AB - In the high volume manufacturing long term stability of process the parameters is essential. In this work we demonstrate the fabrication of backlight device on 50 mm wide and 95 micron thick cellulose acetate (CA) web (from Clarifoil). Optical binary grating design and Ni-mold were produced by Modines Ltd. The fabrication process for flexible Ni-master is shown e.g. in ref. The size of backlight structure is 30 mm x 60 mm consisting a blocks of 5 micron wide cavities as shown in Fig. 1. More than 500 devices was printed on CA-film in continuous roll-to-roll process. Printing speed was varied from 0.1 to 1.0 m/min when temperature was maximized at 118 oC, which is close to the glass transition temperature (125 oC) of CA film. Pressure of ca. 20 MPa was applied in the process. These parameters were optimized for continuous printing process. Higher temperatures or pressures can lead to a break of the web, which prevents continuous processing. In this process we have used a custom made nanoimprinter device.

KW - roll-to-roll

KW - nanoimprinting

KW - NIL, backlight

M3 - Conference article

ER -

Mäkelä T, Haatainen T, Ahopelto J, Oravasaari J, Tuohioja T, Rinko K. Backlight device fabricated by roll-to-roll nanoimprinting. 2010. Paper presented at 36th International Conference on Micro- and Nano-Engineering, MNE 2010, Genoa, Italy.