The integration of pillars serves various needs. Such structures can be used to maintain particles at a certain area, to allow for self-filling of devices via capillary forces, to increase surface area, to have a sieving effect, or to use these structures for surface functionalization with high surface area regions in a microfluidic device.
Complete Cavities Filled with Pillars
![](https://www.microfluidic-chipshop.com/wp-content/uploads/2018/08/Fl_261_drawing.jpg)
Schematic Drawing of Fluidic 261
![](https://www.microfluidic-chipshop.com/wp-content/uploads/2018/06/Fl_261_s-1024x741.jpg)
Fluidic 261