Abstract: A microfluid driving device is provided. The microfluid driving device of this invention comprises microfluid driving platform prepared in a chip, which platform comprises at least two miniature Venturi pumps, at least one microchannel and optionally micro mixers or micro reactors in said microchannel; an external pneumatic flow supply and control module that provides selectively different air flows; and an interface device connecting said microfluid driving platform and said external pneumatic flow supply and control module. The air flows supplied by said the pneumatic flow supply and control module are supplied under selected flow rates and frequencies to said at least two Venturi pumps through said interface device, such that the microfluid inside said microchannel may be driven forward or backward or halt and the transportation, mixing and reaction of the microfluid may be accomplished.

Abstract: A thermolysis reaction actuating pump system including a first set of walls defining a channel having a cross-sectional area less than one millimeter squared, and wherein a liquid is received in the channel. A second set of walls defining a reaction chamber and a thermolytic body carried in the reaction chamber. The first set and second set of walls are constructed and arranged to allow the flow of gas from the reaction chamber into the channel. A heater is positioned to provide heat to the thermolytic body and disassociate the thermolytic body to produce gas to pump the liquid through the channel.

Abstract: A thermolysis reaction actuating pump system including a first set of walls defining a channel having a cross-sectional area less than one millimeter squared, and wherein a liquid is received in the channel. A second set of walls defining a reaction chamber and a thermolytic body carried in the reaction chamber. The first set and second set of walls are constructed and arranged to allow the flow of gas from the reaction chamber into the channel. A heater is positioned to provide heat to the thermolytic body and disassociate the thermolytic body to produce gas to pump the liquid through the channel.

Abstract: A microfluid driving device is provided. The microfluid driving device of this invention comprises microfluid driving platform prepared in a chip, which platform comprises at least two miniature Venturi pumps, at least one microchannel and optionally micro mixers or micro reactors in said microchannel; an external pneumatic flow supply and control module that provides selectively different air flows; and an interface device connecting said microfluid driving platform and said external pneumatic flow supply and control module. The air flows supplied by said the pneumatic flow supply and control module are supplied under selected flow rates and frequencies to said at least two Venturi pumps through said interface device, such that the microfluid inside said microchannel may be driven forward or backward or halt and the transportation, mixing and reaction of the microfluid may be accomplished.

Abstract: In the micro organism cultivation device of this invention, an implantable bio-artificial micro device, i.e., a cell apartment, is provided to cultivate cells or tissues. The cells or tissues to be cultivated include that secrete hormones such as islets of Langerhans. At both sides of the cell apartment, provided are microfluidic channels comprising dynamic micro-electric field array filters. The dynamic micro-electric field array filters comprise a plurality of electrodes distributed inside the microchannels. By periodically switching the polarity of the electrodes, microfluidic flows are generated in the microchannels. All inlet flows to the cell apartment are filtered by the immunoisolation of the micro-electric field array filters before entering into the cell apartment. The micro-electric field array filters provide a physical immune protection to the cells cultivated in the cell apartment against the immune system of the host.

Abstract: The present invention discloses a method for marking an electronic substrate without the splatter or debris defect which can be carried out by first providing a tape, then creating a cavity or a mark through the tape by a high-intensity energy beam or any other suitable mechanical means such that the tape can be laminated to a top surface of the substrate and exposed to an etchant until a similar mark in the substrate is reproduced by the etching process. After the tape is removed, the mark is reproduced in the surface of the electronic substrate.

Abstract: A method is described for selectively etching photoresist on a semiconductor substrate having one or more layers of a spin on glass, including an edge bead that was formed when the glass was originally applied. First the wafer is coated with a layer of unexposed, undeveloped negative photoresist. Then, while spinning the wafer, a vertical jet of photoresist EBR solvent is directed to a point just inside the edge so that photoresist gets removed from an annular area extending inwards from the perimeter. The edge bead is then removed using a liquid etchant and integrated circuit processing can now proceed, making use of the unexposed, undeveloped layer of photoresist in the usual way; that is, exposing it through a mask and then developing and baking it before using it as an etch mask. The method is general and may be used in other situations where selective removal of photoresist along the periphery is required and where the remaining resist is to be used for other purposes.

Abstract: A binder composition for use in making metal parts via a metal powder injection molding process containing the following components: (a) a first polymer with a relatively low solubility parameter such as polyethylene and polypropylene; (b) a second polymer with a relatively high solubility parameter such as polystyrene and poly(methyl methacrylate); and (c) a block copolymer containing blocks of the first and second, or other structurally similar, constituting monomeric units. Examples of the block copolymers include ethylene/styrene copolymer, propylene/styrene copolymer, and isoprene/styrene copolymer, etc. The binder composition is dispersed in an appropriate dispersant, such as an oil or wax, then blended with a metal powder to form a metal powder injection composition. The metal powder injection composition forms a green compact with a predetermined shape and dimension using an injection molding machine. Finally the green compact is sintered to form the final product.