A technical comparison of micro-electrodischarge machining, microdrilling and copper vapour laser machining for the fabrication of ink jet nozzles

Ink jet nozzles require accurate definition and smooth surface finish to promote laminar flow of ink and prevent turbulence. We have fabricated inkjet nozzles by three different fabrication techniques (micro-electrodischarge machining, microdrilling and copper vapour laser machining) to evaluate the characteristics of each technique and assess the differences between them. Scanning electron micrographs illustrate the differences between the three types of nozzle produced and these have been quantified where possible. The machining times for these fabrication processes are also compared.