摘要:
A thermal ink jet printer utilizes a printhead whose electrical connections to the heating elements used to expel the ink droplets has been modified to reduce the effects of parasitic resistance of the common return when a number of resistors are simultaneously addressed. The common return, formed in the same substrate level as the resistor elements, has been modified by forming and interconnecting a second common return. The resistor is connected to an input source by a low resistance connection which is formed to cross-over, or under, the second common.
摘要:
Disclosed are TNF-related apoptosis-inducing ligand (TRAIL) trimers (TR3) and nucleic acids encoding covalently linked TRAIL trimers. A TRAIL trimer can have greater stability compared to native TRAIL, and can retain the native killing ability of TRAIL. Target specificity of a TR3 can be shown by blocking its activity with soluble death receptor 5 (DR5-Fc). Also disclosed are modified TRAIL trimers and nucleic acids encoding them. These modifications include additional functional domains, such as antibody fragments (scFvs). A TR3 comprising an additional functional domain can allow for cell-specific delivery of the TR3. In some configurations, a modification such as the addition of a functional domain can be stoichiometrically controlled. In some configurations, a modification can be inconsequential with regard to the bioactivity of TRAIL. In various embodiments, a TR3, including a modified TR3, can be a cancer-selective drug. In some configurations, a TR3 that comprises an additional biologically active moiety such as a functional domain of a protein can have fewer off-target toxicities compared to TRAIL alone. In some configurations, a TR3 that comprises an additional biologically active moiety such as a functional domain of a protein can have enhanced killing capacities compared to the moiety alone. In some aspects, TR3 activity can be targeted to an RBC membrane. The inventors disclose TR3-decorated RBCs that target cell killing in a model of pancreatic cancer.
摘要:
A method of ML-EM image reconstruction is provided for use in connection with a diagnostic imaging apparatus (10) that generates projection data. The method includes collecting projection data, including measured emission projection data and measured transmission projection data. Optionally, the measured transmission projection data is truncated. An initial emission map and attenuation map are assumed. The emission map and the attenuation map are iteratively updated. With each iteration, the emission map is recalculated by taking a previous emission map and adjusting it based upon: (i) the measured emission projection data; (ii) a reprojection of the previous emission map which is carried out with a multi-dimensional projection model; and, (iii) a reprojection of the attenuation map. As well, with each iteration, the attenuation map is recalculated by taking a previous attenuation map and adjusting it based upon: (i) the measured emission projection data; (ii) a reprojection of the previous emission map which is carried out with the multi-dimensional projection model; and (iii) measured transmission projection data.
摘要:
The systems and methods of this invention allows for an electrical contact structure of the drop ejecting transducer in an inkjet printhead to be designed in such a way that the relatively thick electrical contact lines are not in the ink drop ejection path between the drop ejector transducer and the corresponding nozzle. Such a design thereby minimizes any visible defects due to misdirected satellite drops.
摘要:
An ink jet printhead is disclosed which has improved printhead cooling thereby improving operating efficiency. The printhead is constructed so that the manifold bringing ink from an ink reservoir into an ink inlet to the printer directly contacts the thermally conductive surface of the substrate in which the heater elements are formed- The cooler ink removes some of the accumulated heat from the heater substrate and is subsequently ejected. In one embodiment the printhead comprises an upper channel substrate which is bonded to a lower heater substrate which is formed with a ledge which extends past the rear face of the channel substrate. The channel substrate has an ink inlet formed into its rear face and adjacent to an extended portion of the heater silicon surface. An ink reservoir brings ink to the printhead via an ink manifold which is sealed against the exposed silicon surface and against the side of the ink inlet. In a second embodiment, the formation of an ink inlet at the rear face enables the construction of a compact multicolor sideshooting printhead with 2 rows of nozzles.
摘要:
An improved microelectromechanical device, such as a thermal ink jet die or printhead, is formed by the alignment of two planar substrates bonded together by an intermediate thick film layer of patterned polymeric material, such as polyimide. The improved device has a fully cured, patterned thick film layer which is planarized by chemical-mechanical polishing-to improve the bonding strength between the substrates. The planarization removes topographical formations generated during the deposition of the thick film layer and/or during the patterning of the recesses therein.
摘要:
An ink jet module that can be accurately positioned on a carrier includes a channel die and a heater die. The channel die is rectangular and has a top surface, a bottom surface, a first pair of sides, and a second pair of sides. The bottom surface has a number of spaced parallel channels disposed within it. The channels are parallel to the first pair of sides and extend through one of the second pair of sides. The top surface of the heater die is attached to and aligned with the bottom surface of the channel die. At least one pair of alignment features is disposed within and adjacent a side of the bottom surface of the channel die. The alignment features are recessed areas disposed on opposite sides from each other. The alignment features are dimensioned to receive a retainer that secures the ink jet module to a carrier.
摘要:
An electrostatic discharge protection device for a connector associated with an integrated circuit chip, particularly one associated with a thermal ink-jet printhead. AMOS field effect device extends along at least one edge of the connector on the chip. A bipolar transistor, parasitic to the field effect device, conducts current from the connector to ground in response to a voltage between the connector and ground in excess of a predetermined threshold. A zone of a predetermined electrical resistance is operatively disposed between the bipolar transistor and ground. The zone may substantially encircle the bonding pad of the connector to evenly distribute local incidences of high voltage. The invention enables integrated circuits to pass ESD requirements of office products, which is 15 kV by Human Body Model testing.
摘要:
An electrostatic discharge (ESD) protection device for protecting a high voltage operating circuit having a high voltage input terminal is disclosed. The ESD protection circuit has a substrate, a first diffusion region formed in the substrate connected to the high voltage input terminal, a second diffusion region formed in the substrate connected to ground, a field oxide layer over the substrate having a thickened region extending into the substrate between the first and second diffusion regions, and a drift region formed in the substrate and located between the first diffusion region and the thickened field oxide layer. These regions are so arranged to move the point of avalanche breakdown away from the first diffusion/field oxide interface, so that the avalanche breakdown voltage is lower than that of the protected circuit while simultaneously preventing avalanche included bipolar feedback in the protection device.
摘要:
A resistive heating element is formed by depositing an amorphous silicon film on selected portions of a substrate and heating the deposited amorphous silicon film so that it undergoes solid phase epitaxy to form a (111) textured polycrystalline silicon film. The method is particularly useful for forming electro-thermal transducers for thermal ink jet printheads.