Ink delivery system for an inkjet printhead

A print cartridge for an ink printer comprising:

• a substrate having a top surface and an opposing bottom surface, and having a first outer edge along a periphery of said substrate;
• an ink reservoir for containing an ink supply;
• a nozzle member having a plurality of ink orifices formed therein;
• a plurality of heating means formed on said top surface of said substrate, each of said heating means being located proximate to an associated one of said orifices for vaporizing a portion of ink and expelling said ink from said associated orifice;
• and
• a fluid channel, communicating with said ink reservoir, leading to each of said orifices and said heating means, said fluid channel allowing ink from said ink reservoir to flow around said first outer edge of said substrate and to said top surface said substrate so as to be proximate to said orifices and said heating means, said fluid channel comprising a plurality of ink channels and a plurality of vaporization chambers, said ink channels communicating between said ink reservoir and said vaporization chambers, each of said vaporization chambers being associated with an ink orifice and a heating means.