The following examples of
electro-chemical sensors represent some concepts that Conductive
Technologies has the experience and resources to manufacture. These sensors represent various
ideas on how sensors can be constructed and how they can operate. Because of our non-disclosure
agreements with our partners for which we manufacture biosensors, we are not able to display
the sensors or products that they presently have on the market. The following sensors are
shown to give you a sense of our capabilities.
This is an example of an amperometric sensor. The two carbon electrodes
(.020” or 0.51 mm high) are defined by a dielectric layer that also
serves as a capillary channel (lid not shown). The secondary channel below
the primary channel is designed to allow air to escape from the capillary
as the fluid fills the primary channel.
In this example the working and counter electrodes are printed as several
small elements (0.010” or 0.25 mm high). By subdividing each electrode,
their effective response is increased due to increased surface area in the
sides.
A small, amperometric sensor is shown with a carbon working electrode
(0.040” or 1.02 mm in diameter carbon feature) and a silver/silver
chloride counter electrode. Definition of the working electrode size
(0.2 mm2 area) is accomplished by printing a dielectric layer
(light pink). A printed capillary feature (red) is also shown along with
silver leads.
Several structures are shown in this device. Three unique heating zones
(black features) are constructed by printing a PTC carbon ink over pairs
of silver electrodes. Each zone generates a different thermal setting by
adjustments to at least one of three parameters: the electrode spacing, the
carbon ink thickness and the applied potential. Also shown is a flow channel
that is constructed over the heating zones. This channel is created by
printing a dielectric ink (blue).
Shown is an electrochemical device where the topside has 12 addressable
lanes. Each lane has 8 positions with each position having a carbon and
a silver/silver chloride electrode pair. Only 3 lanes have their electrical
contact on the top surface (lanes 1, 2 and 12).
This sensor shows a long lead with different reactions to be taking place
on the probes. Also by the width variation in the conductive traces, a
built-in resistance type circuit can be created.
This sensor shows an RFID tag that can be produced for various antennae
applications.
