Patent ID: 7334870

Claim:
A method of printing from a printhead, whilst minimizing cross-contamination of ink between adjacent nozzles, the method comprising the steps of: (a) providing a printhead comprising: a substrate including a plurality of nozzles for ejecting ink droplets onto a print medium, each nozzle having a nozzle aperture defined in an ink ejection surface of the substrate; and a plurality of formations on the ink ejection surface, the surface formations being configured to isolate each nozzle from at least one adjacent nozzle; and (b) printing onto a print medium using said printhead, wherein the surface formations are configured in a plurality of nozzle enclosures, each nozzle enclosure comprising sidewalls surrounding a respective nozzle, the sidewalls forming a seal with the ink ejection surface, thereby isolating each nozzle from at least one adjacent nozzle.