Abstract: A semiconductor substrate for an ink jet printhead. The substrate includes a silicon substrate having a thickness ranging from about 500 to about 900 microns and having a first surface and a second surface opposite the first surface. One or more ink feed slots are formed in the silicon substrate from the first surface to the second surface thereof. The ink feed slots have a first width dimension, opposing first ends, and a first length dimension between the opposing first ends adjacent the first surface of the substrate. Stress relieving openings are provided adjacent the opposing first ends of the ink feed slots. The stress relieving openings provide an overall feed slot length dimension, have a radius greater than the first width dimension of the ink feed slots and have a radius to first length dimension ratio ranging from about 1:60 to about 1:250.

Abstract: The invention relates to an ink cartridge body which is removably mountable in a printer carriage area of an ink jet printer and an alignment and latching mechanism for the ink cartridge body. The printer carriage area includes at least first and second spaced-apart elongate guide rails and the ink cartridge body includes a printhead and at least two bearing points at predetermined locations on the ink cartridge body, each of the bearing points disposed on the cartridge body for separately engaging at least one of the elongate guide rails for aligning and maintaining the printhead in a predetermined orientation relative to the print media in the printer. The invention substantially reduces the number of parts and tolerances thereof required for aligning a printhead relative to a print media by directly aligning the cartridge body rather than the carrier in the carriage area of the printer.

Abstract: The invention relates to an ink cartridge body which is removably mountable in a printer carriage area of an ink jet printer and an alignment and latching mechanism for the ink cartridge body. The printer carriage area includes at least first and second spaced-apart elongate guide rails and the ink cartridge body includes a printhead and at least two bearing points at predetermined locations on the ink cartridge body, each of the bearing points disposed on the cartridge body for separately engaging at least one of the elongate guide rails for aligning and maintaining the printhead in a predetermined orientation relative to the print media in the printer. The invention substantially reduces the number of parts and tolerances thereof required for aligning a printhead relative to a print media by directly aligning the cartridge body rather than the carrier in the carriage area of the printer.