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Polyimide

Whitepaper - USP Lasers Deliver Cleaner Cuts for Semiconductor Packaging.pdf

Whitepaper - USP Lasers Deliver Cleaner Cuts for Semiconductor Packaging.pdf

…Whitepaper September 20, 2017
www.coherent.com | tech.sales@coherent.com | 800-527-3786 | 408-764-4983
Figure 2. "Dark Yellow," 30 µm thick polyimide sheets scribed with a nanosecond and USP laser (in the UV). The
nanosecond laser processed at 66 mm/sec, while the USP laser cut at 193…

EU Photonics Flexible Displays.pdf

EU Photonics Flexible Displays.pdf

…reliability A number of rigid carrier separation techniques turn out to be unsuitable for mass production purposes. For examglass substrate spin-on polyimide +TFT array AMOLED + electrophoretic foil and driver foils laser lift-off freestanding flexible display Fig. 1 Schematics of flexible display…

Microelectronics

Microelectronics

…The circuits are fabricated by vapor deposition of a uniform layer of metal (e.g., Au, Ag, Cu, Al) onto a flexible substrate such as PET, polyimide, PEN, or PMMA. The homogenized excimer beam is passed through a photomask, which is then re-imaged on this coated substrate. The high energy…

COHR WhitePaper High Repetition Rate USP Lasers Improve OLED Cutting Results.pdf

COHR WhitePaper High Repetition Rate USP Lasers Improve OLED Cutting Results.pdf

…impact. This minimizes the heat affected zone, and leaves no recast material that
could require post-processing.
Figure 2. 30 µm thick polyimide sheets cut with a nanosecond and USP laser (in the UV). The nanosecond
laser processed at 66 mm/sec, while the USP laser cut at 193 mm/sec.…

Microsoft Word - NovusLight 2018-07 Microelectronics Packaging

Microsoft Word - NovusLight 2018-07 Microelectronics Packaging

…be
degraded by "shadowing" on the sides of steep angled features.
Figure 2: Excimer laser ablation produces clean, small features in polyimide. Courtesy of SÜSS
Microtec.
LTCC scribing and srilling with CO2
and CO lasers
Other important packaging applications involve…

CMM 10.4.indd

CMM 10.4.indd

…marking)
cannot reach the required level of accuracy for
this application (see figure 2).
Figure 2: "Dark Yellow," 30 µm thick polyimide sheets scribed with a nanosecond and USP laser (in the UV). The nanosecond laser processed at
66 mm/sec, while the USP laser cut at 193…

OLED Flexible Displays OPE2017 .pdf

OLED Flexible Displays OPE2017 .pdf

…and ultraviolet.
This clearly demonstrates the improvement in cut quality with
decreasing wavelength
"Dark Yellow," 30µm thick polyimide sheets scribed with a nanosecond
and USP laser. The nanosecond laser processed at 66mm/sec, while the
USP laser cut at 193mm/sec. The…

Industrial Laser Solutions - September/October 2015

Industrial Laser Solutions - September/October 2015

…thickness (usually >1µm). The photoresist is stripped and
FIGURE 2. Excimer laser ablation
produces clean, small features in
polyimide.
FIGURE 3. Varying laser fluence enables manipulation of feature
side-wall angles, which can be important in subsequent deposition

Whitepaper Thin Wafer Laser Debonding.pdf

Whitepaper Thin Wafer Laser Debonding.pdf

…Advantage
The most important advantage of 308 nm excimer laser
debonding over other techniques is that it enables
utilization of polyimide based temporary adhesives
which can withstand exposure to temperatures as high
as 400°C.
This enables the bonded assembly to…

COHR MedicalOCTprobe DS 0619.pdf

COHR MedicalOCTprobe DS 0619.pdf

…0.5 0.5 1.0 1.0
Coating Diameter (µm) 150 ±5 100 ±5 175 ±15 175 ±15
Coating Concentricity (µm) 1.5 1.5 5 5
Coating Material Polyimide Polyimide Low Index
Dual Acrylate
Dual Acrylate
Clad NA NA NA 0.46 (5%) 0.22 (50%)
Operating Temperature -65 to 300°C
(-85 to…

Coherent-new-lasers-improve-glass-cutting-methods wp.pdf

Coherent-new-lasers-improve-glass-cutting-methods wp.pdf

…tech.sales@coherent.com | 800-527-3786 | 408-764-4983
Figure 3. Example of mixed material cutting. This shows an edge view of 20 microns of polyimide on 0.5 mm glass, cut
with a Coherent Monaco femtosecond laser with 40 watts of average power and a pulse width ~350 fs. The surface

Photonics Spectra - March 2018

Photonics Spectra - March 2018

…"delicate"
and "tough" materials, which are finding
increasing use in microelectronic and display fabrication.
One such composite is polyimide on
glass, a common combination used in
OLED substrates. Filamentation cutting
is an effective technique for cutting glass