A method of manufacturing an ink jet printer having a thermal actuator
comprising an external coil spring is disclosed wherein an array of
nozzles are formed on a substrate utilising planar monolithic deposition,
lithographic and etching processes. Multiple ink jet heads are preferably
formed simultaneously on a single planar substrate. The substrate can be a
silicon wafer. The print heads are preferably formed utilising standard
vlsi/ulsi processing. Integrated drive electronics are preferably formed
on the same substrate. The integrated drive electronics can comprise a
CMOS process. Ink can be ejected from the substrate substantially normal
to the substrate.
