Patent ID: 7043838

Claim:
A method of making a multi-fluid cartridge for holding multiple fluids in segregated containment localities, the cartridge body containing fluid supply paths in fluid flow communication with the containment localities, comprising the steps of: attaching a nozzle plate to a device side of each of a plurality of defined ejection head substrates on a semiconductor wafer, each of the ejection head substrates having a fluid supply side and two or more fluid flow paths therein for supplying fluid from the supply side to the device side thereof, wherein the fluid flow paths in the ejection head substrate have a flow path density of greater than about 1.0 flow paths per millimeter; dicing the wafer to provide a plurality of micro-fluid ejection device structures; attaching a circuit device to the device side of each of the substrates; and stencil printing an adhesive with a bond line density of at least about 1.2 mm −1 on the fluid supply side of the micro-fluid ejection device structures or on the cartridge body; and adhesively bonding at least one of the micro-fluid ejection device structures and the attached circuit device to the cartridge body for flow of fluid from the containment localities to the device side thereof.