Abstract
A pilot scale roll-to-roll manufacturing process for backlight devices was demonstrated using Poly(methyl methacrylate) (PMMA) film. Backlight device (28 × 28) mm2 consist more than 78,000 binary elements with different orientation. Each element has 40 trenches with 5 μm width and 1.3 μm thick, totally 3.1 million trenches in one device. These devices can be used for display illumination in various applications when three LED is connected on the other end of the device. More than 1000 device was printed on 50 mm wide 375 μm thick PMMA web using custom made nanoimprinting equipment. These devices demonstrate a high throughput and a low cost production possibility for micron- and submicron optical structures.
The printed patterns were analysed by using optical microscopy, atomic force microscopy (AFM) and confocal microscopy. The backlight device after LED integration was characterized using luminescence measurements. The three surface mounted LED is connect to the upper side of printed PMMA device to give light in the polymer film. To collect statistics, every 50th sample was analysed. The pattern replication is good and the depth of the imprinted structure is typically in the range of 1.2–1.4 μm when limits for working device is ca. 1.0 μm. The optical properties of the analysed devices show good homogeneity inside one device. The standard deviation for the measured luminescence values for all devices was within 17% which is still acceptable for final production. No drastic wearing of the stamp can be seen after pilot manufacturing.
| Original language | English |
|---|---|
| Pages (from-to) | 89-91 |
| Number of pages | 3 |
| Journal | Microelectronic Engineering |
| Volume | 97 |
| DOIs | |
| Publication status | Published - 2012 |
| MoE publication type | A1 Journal article-refereed |
| Event | 37th International Conference on Micro- and Nano-Engineering, MNE 2011 - Berlin, Germany Duration: 19 Sep 2011 → 23 Sep 2011 Conference number: 37 |
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Keywords
- Backlight
- hot embossing
- nanoimprinting
- PMMA
- roll-to-roll
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Roll-to-roll pilot nanoimprinting process for backlight devices. / Mäkelä, Tapio (Corresponding Author); Haatainen, Tomi.
In: Microelectronic Engineering, Vol. 97, 2012, p. 89-91.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Roll-to-roll pilot nanoimprinting process for backlight devices
AU - Mäkelä, Tapio
AU - Haatainen, Tomi
N1 - Based on conf. paper P-LITH-045
PY - 2012
Y1 - 2012
N2 - A pilot scale roll-to-roll manufacturing process for backlight devices was demonstrated using Poly(methyl methacrylate) (PMMA) film. Backlight device (28 × 28) mm2 consist more than 78,000 binary elements with different orientation. Each element has 40 trenches with 5 μm width and 1.3 μm thick, totally 3.1 million trenches in one device. These devices can be used for display illumination in various applications when three LED is connected on the other end of the device. More than 1000 device was printed on 50 mm wide 375 μm thick PMMA web using custom made nanoimprinting equipment. These devices demonstrate a high throughput and a low cost production possibility for micron- and submicron optical structures.The printed patterns were analysed by using optical microscopy, atomic force microscopy (AFM) and confocal microscopy. The backlight device after LED integration was characterized using luminescence measurements. The three surface mounted LED is connect to the upper side of printed PMMA device to give light in the polymer film. To collect statistics, every 50th sample was analysed. The pattern replication is good and the depth of the imprinted structure is typically in the range of 1.2–1.4 μm when limits for working device is ca. 1.0 μm. The optical properties of the analysed devices show good homogeneity inside one device. The standard deviation for the measured luminescence values for all devices was within 17% which is still acceptable for final production. No drastic wearing of the stamp can be seen after pilot manufacturing.
AB - A pilot scale roll-to-roll manufacturing process for backlight devices was demonstrated using Poly(methyl methacrylate) (PMMA) film. Backlight device (28 × 28) mm2 consist more than 78,000 binary elements with different orientation. Each element has 40 trenches with 5 μm width and 1.3 μm thick, totally 3.1 million trenches in one device. These devices can be used for display illumination in various applications when three LED is connected on the other end of the device. More than 1000 device was printed on 50 mm wide 375 μm thick PMMA web using custom made nanoimprinting equipment. These devices demonstrate a high throughput and a low cost production possibility for micron- and submicron optical structures.The printed patterns were analysed by using optical microscopy, atomic force microscopy (AFM) and confocal microscopy. The backlight device after LED integration was characterized using luminescence measurements. The three surface mounted LED is connect to the upper side of printed PMMA device to give light in the polymer film. To collect statistics, every 50th sample was analysed. The pattern replication is good and the depth of the imprinted structure is typically in the range of 1.2–1.4 μm when limits for working device is ca. 1.0 μm. The optical properties of the analysed devices show good homogeneity inside one device. The standard deviation for the measured luminescence values for all devices was within 17% which is still acceptable for final production. No drastic wearing of the stamp can be seen after pilot manufacturing.
KW - Backlight
KW - hot embossing
KW - nanoimprinting
KW - PMMA
KW - roll-to-roll
U2 - 10.1016/j.mee.2012.03.031
DO - 10.1016/j.mee.2012.03.031
M3 - Article
VL - 97
SP - 89
EP - 91
JO - Microelectronic Engineering
JF - Microelectronic Engineering
SN - 0167-9317
ER -