Patent ID: 6109733
Filing Date: 2000-08-29
Classification: B41J

Abstract:
A thermal ink jet printhead, including:a silicon substrate,a thermally grown field oxide layer formed on the surface of the silicon substrate,an array of heating resistors formed overlying the thermally grown field oxide layer, the heating resistors comprising a conductive layer of an electrically resistive compound of the general formula (A)B2 where A is a metal from the group consisting of zirconium, tantalum, tungsten, niobium, molybdenum, titanium, vanadium, and hafnium, and B is boron, and a deposited oxide layer formed overlying said thermally grown field oxide layer and underlying said conductive layer, the oxide layer comprising said general formula and oxygen, whereby the thermally grown field oxide layer and the deposited oxide layer provide thermal insulation between the silicon substrate and the conductive layers of the heating resistors.