Liquid jet recording head having multiple liquid chambers on a single substrate

Claim 1

A liquid jet recording apparatus comprising: an integral substrate member including a single substrate and a plurality of substantially identical electrode patterns providing a like plurality of heat generating element groups formed directly on one side of said single substrate, each said group including the same number of plural heat generating elements for generating thermal energy and each said group having associated therewith a supplying hole for supplying a recording liquid to said heat generating elements in said group; and liquid chamber means attached to said integral substrate member to provide on said substrate a plurality of substantially identical separate liquid chambers prevented from fluid communication with each other for accommodating recording liquids having different colors or densities, each said separate liquid chamber being associated with one of said heat generating element groups and including a plurality of liquid paths, each terminating at a discharge orifice adjacent one of said heat generating elements in said associated group, so that recording liquid supplied to said liquid chamber by said supplying hole can be selectively discharged from said orifices by the thermal energy generated by said heat generating elements, wherein said plurality of patterns of electrodes are substantially identically oriented and are arranged side-by-side on said substrate whereby there is provided a like plurality of discharge orifice groups, each being associated with a corresponding said electrode pattern and being precisely located with respect to the other said discharge orifice groups.