Method for forming an electrode-containing device with capillary transport between electrodes
First Claim
1. A method for making a device for the determination of activity of an ionic analyte of a liquid, said device including a pair of solid electrodes each constructed to generate therein an electrical potential that is proportional to the analyte activity present in a contacting quantity of said liquid, and flow control means for directing flow of respective quantities of two such liquids each to a different one of said electrodes and to a junction between said liquids, said control means including a member bridging and contacting said two electrodes;
- the method comprising the steps of(a) providing a first sheet of formable insulative material having a width and length;
(b) forming in said sheet a plurality of adjacent channels extending generally the length of said sheet, a surface of one of said channels being configured to transport liquid;
(c) superimposing above said formed sheet a second insulative sheet a surface portion of which is channeled to transport liquid and is opposite to and spaced away from said one surface a distance effective to induce capillary flow of the liquid between said portion and said one channel surface;
(d) securing said second sheet to said first sheet to define a capillary liquid transport zone extending in the direction of the length of said first sheet; and
, in any order,(e) forming apertures extending all the way through said secured first and second sheets;
(f) severing individual units from said secured sheets; and
(g) completing the manufacture of a plurality of said devices by attaching a pair of said electrodes to an exterior surface of said first sheet of each of said individual units, each of said electrodes being aligned with one of said apertures.
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Accused Products
Abstract
A device suitable for potentiometric analysis of liquid ions is disclosed, wherein a liquid transport member extending between and adjacent to two electrodes comprises two opposed surfaces spaced apart a distance to induce capillary flow of liquid between the surfaces.
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Citations
5 Claims
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1. A method for making a device for the determination of activity of an ionic analyte of a liquid, said device including a pair of solid electrodes each constructed to generate therein an electrical potential that is proportional to the analyte activity present in a contacting quantity of said liquid, and flow control means for directing flow of respective quantities of two such liquids each to a different one of said electrodes and to a junction between said liquids, said control means including a member bridging and contacting said two electrodes;
- the method comprising the steps of
(a) providing a first sheet of formable insulative material having a width and length; (b) forming in said sheet a plurality of adjacent channels extending generally the length of said sheet, a surface of one of said channels being configured to transport liquid; (c) superimposing above said formed sheet a second insulative sheet a surface portion of which is channeled to transport liquid and is opposite to and spaced away from said one surface a distance effective to induce capillary flow of the liquid between said portion and said one channel surface; (d) securing said second sheet to said first sheet to define a capillary liquid transport zone extending in the direction of the length of said first sheet; and
, in any order,(e) forming apertures extending all the way through said secured first and second sheets; (f) severing individual units from said secured sheets; and (g) completing the manufacture of a plurality of said devices by attaching a pair of said electrodes to an exterior surface of said first sheet of each of said individual units, each of said electrodes being aligned with one of said apertures. - View Dependent Claims (2, 3, 4, 5)
- the method comprising the steps of
Specification