**8. Fabrication process of microfluidic devices**

The selection of microfluidic fabrication process is dependent on type of material selection for different microfluidic application. The special grade stainless steel, borosilicate glass, PDMS (polydimethylsiloxane), PMMA(Poly methyl metacrylate) copper, aluminum and Acrylic have been used as solid material for microfluidic device fabrication. Chemical etching, 3D printing, Additive manufacturing, micromachining are the common manufacturing practices for the development of different microfluidic devices [68–70].
