A microfluidic mixer of high throughput fabricated in glass using femtosecond laser micromachining combined with glass bonding

We demonstrate a microfluidic mixer of high mixing efficiency in fused silica substrate using femtosecond laser-induced wet etching and hydroxide-catalysis bonding method. The micromixer has a three-dimensional geometry, enabling efficient mixing based on Baker's transformation principle. The cross-sectional area of the fabricated micromixer was 0.5 x 0.5 mm², enabling significantly promotion of the throughput of the micromixer. The performance of the fabricated micromixers was evaluated by mixing up blue and yellow ink solutions with a flow rate as high as 6 mL/min.