Electrochemical sensing electrodes and biosensors and production methods

A method for producing an electrochemical analyte sensing electrode comprising a substrate having a first surface comprising a sensing chemistry on an electrode, the method comprising:

• applying an area of electrode material onto the first surface of the substrate;
• applying a sensing chemistry material covering the area of the electrode material;
• and
• following the applying of the sensing chemistry, making a laser cut extending fully through the electrode material and the sensing chemistry material and not through the substrate,
• the laser cut configured to define the sensing electrode inside the laser cut,
• the laser cut forming a gap physically and electrically separating the electrode material and the sensing chemistry material inside the laser cut from the electrode material and the sensing chemistry material outside the laser cut,
• the laser cut thereby defining an active perimeter of the sensing electrode, the sensing electrode being isolated from electrode material and sensing chemistry material outside the active perimeter.

A method for producing a plurality of electrochemical analyte sensing electrodes by separating the sensing electrodes from a continuous substrate, the method comprising:

• applying onto a substrate a plurality of electrode systems, each electrode system comprising an area of electrode material on the substrate and an area of sensing chemistry material covering the area of electrode material;
• as to each electrode system, making a laser cut extending fully through the electrode material and the sensing chemistry material and not through the substrate,
• each laser cut being configured to define a sensing electrode inside the laser cut,
• each laser cut forming a gap physically and electrically separating the electrode material and the sensing chemistry material inside the laser cut from the electrode material and the sensing chemistry material outside the laser cut,
• each sensing electrode being isolated from electrode material and sensing chemistry material outside the gap;
• and
• following the making of the laser cuts, separating the sensing electrodes from the substrate.

An electrochemical analyte sensing electrode comprising:

• a substrate having a first surface;
• an area of electrode material on the first surface;
• and
• a sensing chemistry material covering the area of electrode material,
• the electrode material and the sensing chemistry material comprising a gap physically and electrically separating electrode material and sensing chemistry material inside the gap from electrode material and sensing chemistry material outside the gap,
• the electrode material and the sensing chemistry material inside the gap comprising the sensing electrode isolated from the electrode material and the sensing chemistry material outside the gap.