Abstract: A fluidic ejection cartridge is disclosed. The cartridge includes a cartridge body having an upper portion, a lower portion, at least one sidewall, and a hollow cavity within the cartridge body defining a fluid reservoir. The cartridge also includes a cartridge lid disposed over and sealed to the upper portion of the cartridge body, as well as a cartridge bottom plate disposed under and sealed to the lower portion of the cartridge body. A cartridge nosepiece is disposed under and sealed to the cartridge bottom plate. This nosepiece includes at least one fluidic ejection chip in fluid flow communication with the fluid reservoir. According to the present disclosure, the cartridge body, the cartridge lid, and the cartridge bottom are each made from ceramic.

Abstract: A fluidic ejection cartridge is disclosed. The cartridge includes a cartridge body having an upper portion, a lower portion, at least one sidewall, and a hollow cavity within the cartridge body defining a fluid reservoir. The cartridge also includes a cartridge lid disposed over and sealed to the upper portion of the cartridge body, as well as a cartridge bottom plate disposed under and sealed to the lower portion of the cartridge body. A cartridge nosepiece is disposed under and sealed to the cartridge bottom plate. This nosepiece includes at least one fluidic ejection chip in fluid flow communication with the fluid reservoir. According to the present disclosure, the cartridge body, the cartridge lid, and the cartridge bottom are each made from ceramic.

Abstract: A printhead assembly including an ink cartridge body made of a material selected from the group of materials consisting of: nylon, polyethersulfone, polypropylene, polyethylene, polyoxymethylene and other materials that are compatible with ketone, acetate and alcohol based inks, an ink reservoir disposed within the ink cartridge body and adapted to receive and contain ink, and a printhead chip provided on the ink cartridge body and in fluid communication with the ink reservoir so as to receive ink from the ink reservoir for ejection of the ink onto a print medium.

Abstract: A fluidic delivery device includes a fluid supply containing a fluid, the fluid supply has a fluid reservoir and a pair of fluid permeable compressible bodies located in the fluid reservoir. One of the fluid permeable compressible bodies has an effective greater density than the other fluid permeable compressible body.

Abstract: A fluidic delivery device includes a fluid supply containing a fluid, the fluid supply has a fluid reservoir and a pair of fluid permeable compressible bodies located in the fluid reservoir. One of the fluid permeable compressible bodies has an effective greater density than the other fluid permeable compressible body.

Abstract: A cap for a printhead device including a main body that includes a side wall, a top wall, and a bottom wall, the top wall and the bottom wall in a facing relation to one another so that a printhead device is held between the top and bottom walls, a vent seal disposed within an opening in the top wall, a nozzle plate seal disposed within an opening in the bottom wall, and a nozzle plate seal retainer that holds the nozzle plate seal within the opening in the bottom wall.

Abstract: A SAT filter builder and method for building a SAT filter is provided. Hash functions are utilized to map elements of a domain subset to a set of literals which are in turn used to create a set of equations. These equations are conjoined to provide a satisfiability instance. The satisfiability instance is provided to an equation solver and the solution is provided to an array to build the filter. A query tool is also provided which allows the filter built by the SAT filter to test an element for set membership. The query tool utilizes the same hash functions used by the SAT filter builder to map the element to be tested to a set of literals. These literals are used to create an equation. The solution identified by the SAT builder tool is then provided to the equation created by the query tool and set membership is determined by determining whether the equation provided by the query tool is satisfied by the solution provided by the SAT filter builder.

Abstract: A printhead assembly including an ink cartridge body made of a material selected from the group of materials consisting of: nylon, polyethersulfone, polypropylene, polyethylene, polyoxymethylene and other materials that are compatible with ketone, acetate and alcohol based inks, an ink reservoir disposed within the ink cartridge body and adapted to receive and contain ink, and a printhead chip provided on the ink cartridge body and in fluid communication with the ink reservoir so as to receive ink from the ink reservoir for ejection of the ink onto a print medium.

Abstract: A printhead assembly including an ink cartridge body made of a material selected from the group of materials consisting of: nylon, polyethersulfone, polypropylene, polyethylene, polyoxymethylene and other materials that are compatible with ketone, acetate and alcohol based inks, an ink reservoir disposed within the ink cartridge body and adapted to receive and contain ink, and a printhead chip provided on the ink cartridge body and in fluid communication with the ink reservoir so as to receive ink from the ink reservoir for ejection of the ink onto a print medium.

Abstract: A cap for a printhead device including a main body that includes a side wall, a top wall, and a bottom wall, the top wall and the bottom wall in a facing relation to one another so that a printhead device is held between the top and bottom walls, a vent seal disposed within an opening in the top wall, a nozzle plate seal disposed within an opening in the bottom wall, and a nozzle plate seal retainer that holds the nozzle plate seal within the opening in the bottom wall.

Abstract: A muzzle cap for a printhead assembly including a main body comprising a side wall, a top wall and a bottom wall, a vent seal disposed within an opening in the top wall, a nozzle plate seal disposed within an opening in the bottom wall, and a nozzle plate seal retainer that holds the nozzle plate seal within the opening in the bottom wall.

Abstract: A printhead assembly including an ink cartridge body made of a material selected from the group of materials consisting of: nylon, polyethersulfone, polypropylene, polyethylene, polyoxymethylene and other materials that are compatible with ketone, acetate and alcohol based inks, an ink reservoir disposed within the ink cartridge body and adapted to receive and contain ink, and a printhead chip provided on the ink cartridge body and in fluid communication with the ink reservoir so as to receive ink from the ink reservoir for ejection of the ink onto a print medium.

Abstract: A muzzle cap for a printhead assembly including a main body comprising a side wall, a top wall and a bottom wall, a vent seal disposed within an opening in the top wall, a nozzle plate seal disposed within an opening in the bottom wall, and a nozzle plate seal retainer that holds the nozzle plate seal within the opening in the bottom wall.

Abstract: Environmentally friendly thick film layers for a micro-fluid ejection head and micro-fluid ejection heads are disclosed. The environmentally friendly thick film layer includes a negative photoresist layer derived from a composition comprising a multi-functional epoxy compound, a low molecular weight polymeric difunctional epoxy compound, a monomeric difunctional epoxy compound, a methide-based photoacid generator that does not contain antimony, a chromophore and an aryl ketone solvent. Optionally the photoresist layer contains an adhesion enhancer. The negative photoresist layer is environmentally friendly and provides good resolution, well defined critical dimensions, straight side walls, and a large processing window.

Abstract: A solvent resistant printhead having a barrier deposited and intercalating into the various polymeric materials on the printhead is disclosed. The deposition process may be performed at the various level of production depending on what material or surface requires protection from the solvent. The barrier may include a base coating and an outer coating. The base coating may include an intercalate layer deposited on the printhead and intercalating into the various polymeric materials and a tie layer deposited on the intercalate layer. The outer coating may be a self-assembled monolayer deposited on the base coating.

Abstract: Environmentally friendly thick film layers for a micro-fluid ejection head and micro-fluid ejection heads are disclosed. The environmentally friendly thick film layer includes a negative photoresist layer derived from a composition comprising a multi-functional epoxy compound, a low molecular weight polymeric difunctional epoxy compound, a monomeric difunctional epoxy compound, a methide-based photoacid generator that does not contain antimony, a chromophore and an aryl ketone solvent. Optionally the photoresist layer contains an adhesion enhancer. The negative photoresist layer is environmentally friendly and provides good resolution, well defined critical dimensions, straight side walls, and a large processing window.

Abstract: Adhesive compositions, micro-fluid ejection devices, and methods for attaching micro-fluid ejection heads to devices. One such adhesive composition is provided for use in attaching a micro-fluid ejection head to a device, such as to reduce chip bowing and/or to decrease chip fragility upon curing of the adhesive. Such an exemplary composition may include one having from about 50.0 to about 95.0 percent by weight of at least one cross-linkable resin selected from the group consisting of epoxy resins, siloxane resins, urethane resins, and functionalized olefin resins; from about 0.1 to about 25.0 percent by weight of at least one thermal curative agent; and from about 0.0 to about 30.0 percent by weight filler, and exhibit a relatively low shear modulus upon curing (e.g., less than about 10.0 MPa at 25° C.).

Abstract: Micro-fluid ejection head structures, methods of making micro-fluid ejection head structures having improved operability, and methods for improving the durability of micro-fluid ejection head structures are provided. One such micro-fluid ejection head structure includes a micro-fluid ejection head having a substrate and nozzle plate assembly adhesively attached adjacent to a substrate support using a substrate adhesive. The nozzle plate is adhesively attached adjacent to the substrate with a nozzle plate adhesive. A thermally, UV or other cure mechanism encapsulant material is attached adjacent to the ejection head and substrate support. Each of the substrate adhesive, and the encapsulant material, after curing, have a Young's modulus of less than about 2000 MPa, a shear modulus at 25° C. of less than about 15 MPa, and a glass transition temperature of less than about 90° C.

Abstract: A method of making a micro-fluid ejection head structure for a micro-fluid ejection device. The method includes applying a removable mandrel material to a semiconductor substrate wafer containing fluid ejection actuators on a device surface thereof. The mandrel material is shaped to provide fluid chamber and fluid channel locations on the substrate wafer. A micro machinable material is applied to the shaped mandrel and the device surface of the wafer to provide a nozzle plate and flow feature layer on the shaped mandrel and wafer. A plurality of nozzle holes are formed in the nozzle plate and flow feature layer. The shaped mandrel material is then removed from the device surface of the substrate wafer to provide fluid chambers and fluid channels in the nozzle plate and flow feature layer.

Abstract: A polyimide photoresist for thick film flow features adheres to a polyimide nozzle plate or other materials, without the use of an adhesive material between the two surfaces. Further, the photoresist can utilize an acrylate UV initiator, which can reduce the potential for HF to interact with the ink, and which can cause flocculation and eliminate the need for extremely long postbake cures used to remove HF from the photoresist. In another embodiment, an epoxy adhesive containing a dicyandiamide catalyst can be used to improve adhesion between polyimide films and a respective substrate.