×

Method for forming an electrode-containing device with capillary transport between electrodes

  • US 4,413,407 A
  • Filed: 11/09/1981
  • Issued: 11/08/1983
  • Est. Priority Date: 03/10/1980
  • Status: Expired due to Fees
First Claim
Patent Images

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 all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×