Laser-assisted patterning of double-sided adhesive tapes for optofluidic chip integration

Vanessa Zamora; Christian Janeczka; Norbert Arndt-Staufenbiel; George Havlik; Marco Queisser; Henning Schröder

doi:10.1117/12.2290496

20 February 2018 Laser-assisted patterning of double-sided adhesive tapes for optofluidic chip integration

Vanessa Zamora, Christian Janeczka, Norbert Arndt-Staufenbiel , George Havlik, Marco Queisser, Henning Schröder

Proceedings Volume 10510, Frontiers in Biological Detection: From Nanosensors to Systems X; 105100P (2018) https://doi.org/10.1117/12.2290496
Event: SPIE BiOS, 2018, San Francisco, California, United States

Abstract

Portable high-sensitivity biosensors exhibit a growing demand in healthcare, food industry and environmental monitoring sectors. Optical biosensors based on photonic integration platforms are attractive candidates due to their high sensitivity, compactness and multiplexing capabilities. However, they need a low-cost and reliable integration with the microfluidic system. Laser-micropatterned double-sided biocompatible adhesive tapes are promising bonding layers for hybrid integration of an optofluidic biochip. As a part of the EU-PHOCNOSIS project, double-sided adhesive tapes have been proposed to integrate the polymer microfluidic system with the optical integrated waveguide sensor chip. Here the adhesive tape should be patterned in a micrometer scale in order to create an interaction between the sample that flows through the polymer microchannel and the photonic sensing microstructure. Three laser-assisted structuring methods are investigated to transfer microchannel patterns to the adhesive tape. The test structure design consists of a single channel with 400 μm wide, 30 mm length and two circular receivers with 3 mm radius. The best structuring results are found by using the picosecond UV laser where smooth and straight channel cross-sections are obtained. Such patterned tapes are used to bond blank polymer substrates to blank silicon substrates. As a proof of concept, the hybrid integration is tested using colored DI-water. Structuring tests related to the reduction of channel widths are also considered in this work. The use of this technique enables a simple and rapid manufacturing of narrow channels (50-60 μm in width) in adhesive tapes, achieving a cheap and stable integration of the optofluidic biochip.

Citation Download Citation

Vanessa Zamora, Christian Janeczka, Norbert Arndt-Staufenbiel , George Havlik, Marco Queisser, and Henning Schröder "Laser-assisted patterning of double-sided adhesive tapes for optofluidic chip integration", Proc. SPIE 10510, Frontiers in Biological Detection: From Nanosensors to Systems X, 105100P (20 February 2018); https://doi.org/10.1117/12.2290496

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KEYWORDS

Adhesives

Ultraviolet radiation

Picosecond phenomena

Optofluidics

Gas lasers

Glasses

Microfluidics

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