Spray tip for a microfluidic laboratory microchip
First Claim
1. Microfluidic chip for the chemical, physical, and/or biological analysis or synthesis of substances, comprising a channel structure arranged on one side of a carrier having an essentially flat portion, the substances being capable of being moved according to the channel structure under the imposition of an electrical potential, an integrated micro spray tip for dispersion spraying of the substances, the micro spray tip and the carrier being a monolithic single unit;
- the micro spray tip and the channel structure being arranged on opposite sides of the same carrier, the micro spray tip including a passage channel projecting substantially at right angles to a plane of the channel structure of the flat portion of the carrier;
the micro spray tip, on the side of the carrier including the channel structure being connected by the passage channel thereof to the channel structure of the carrier flat portion in a substance-conveying manner; and
an electrical voltage source connected to the micro spray tip in an electrically-conductive manner for dispersion spraying of the substance.
1 Assignment
0 Petitions
Accused Products
Abstract
A laboratory microchip includes a carrier with a micro spray tip projecting vertically out of a plane of the carrier. The carrier and spray tip are designed as a monolithic or single unit. The spray tip includes a passage channel which conveys the substances to be sprayed from a channel to a spray tip aperture. The channel is a part of a channel structure which is enclosed to the outside by a cover plate. The spray tip includes, on the sides of the spray aperture, an area which tapers conically inwards. Connected to this tapered area is a constant cross-section drill hole forming an annular internal step formation at the transition between the two areas. The outer diameter of the conically tapering tip is locally reduced in proximity to the aperture to provide a finer tip to the spray tip. The finer tip increases the electrical fields occurring at the tip, to further increase the forces which act on the substances and for dispersion spraying.
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Citations
23 Claims
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1. Microfluidic chip for the chemical, physical, and/or biological analysis or synthesis of substances, comprising a channel structure arranged on one side of a carrier having an essentially flat portion, the substances being capable of being moved according to the channel structure under the imposition of an electrical potential, an integrated micro spray tip for dispersion spraying of the substances, the micro spray tip and the carrier being a monolithic single unit;
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the micro spray tip and the channel structure being arranged on opposite sides of the same carrier, the micro spray tip including a passage channel projecting substantially at right angles to a plane of the channel structure of the flat portion of the carrier;
the micro spray tip, on the side of the carrier including the channel structure being connected by the passage channel thereof to the channel structure of the carrier flat portion in a substance-conveying manner; and
an electrical voltage source connected to the micro spray tip in an electrically-conductive manner for dispersion spraying of the substance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. Microfluidic chip for the chemical, physical, and/or biological analysis or synthesis of substances, comprising a channel structure arranged on one side of a carrier having an essentially flat portion, the substances being capable of being moved according to the channel structure under the imposition of an electrical potential, an integrated micro spray tip for dispersion spraying of the substances, the micro spray tip including a passage channel projecting substantially at right angles to a plane of the channel structure of the flat portion of the carrier;
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the micro spray tip on the side of the carrier including the channel structure being connected by the passage channel thereof to the channel structure of the carrier flat portion in a substance-conveying manner; and
an electrical voltage source connected to the micro spray tip in an electrically-conductive manner for dispersion spraying of the substance, the microchip being adapted for use with substances having sufficient electrical conductivity to provide an electrical path through the substances from the voltage source to an exit region of the spray tip, the spray tip being arranged to enable the voltage source to be connected to the exit region only by the substances. - View Dependent Claims (21, 22, 23)
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Specification