An ink jet printhead chip includes a wafer substrate. Drive circuitry is positioned on the wafer substrate. A plurality of nozzle arrangements is positioned on the wafer substrate. Each nozzle arrangement includes nozzle chamber walls and a roof wall positioned on the wafer substrate to define a nozzle...http://www.google.com/patents/US6682174?utm_source=gb-gplus-sharePatent US6682174 - Ink jet nozzle arrangement configuration
