FLUID EJECTION CHIP INCLUDING HYDROPHILIC AND HYDROPHOPIC SURFACES AND METHODS OF FORMING THE SAME

摘要

A fluid ejection chip and associated methods of forming are disclosed. According to an exemplary embodiment, the fluid ejection chip comprises a substrate, a flow feature layer, and a nozzle layer. The flow feature layer is disposed over the substrate and has an exposed hydrophilic surface layer with an ink contact angle of about 80 degrees. The nozzle layer is disposed over the flow feature layer and has a thickness of about 4 microns to about 8 microns and an exposed hydrophobic surface layer having an ink contact angle of about 115 degrees.

主权项

1. A fluid ejection chip, comprising:
a substrate; a flow feature layer disposed over the substrate and having an exposed hydrophilic surface layer with an ink contact angle of about 80 degrees; and a nozzle layer disposed over the flow feature layer and having a thickness of about 4 microns to about 8 microns, the nozzle layer having an exposed hydrophobic surface layer, the exposed hydrophobic surface layer having an ink contact angle of about 115 degrees.