Biosensor
AssigneeLeadway (Hk) Limited
InventorsYu Zhang, Jing Li, Xiaoxu Zeng, Li Zhang, Jun Sun
Life of this patent
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Abstract
The present invention relates to a biosensor capable of determining whether the sample addition amount is sufficient. The biosensor at least comprises an insulating substrate, a working electrode and a fill detection electrode. The fill detection electrode is further away from the sample supply port of the biosensor than the working electrode, and the fill detection electrode is not in contact with a sample supply channel. The biosensor of the present invention can determine whether the sample amount added to the biosensor meets detection requirements, which effectively avoids the risk of insufficient sample amount and ensures the accuracy of test results.
Claims13
A biosensor comprising:
- an insulating substrate,
- an axial sample supply channel comprising a proximal end at a first end of the insulating substrate, a distal end, a pair of opposed lateral side walls, and a sample supply port at the proximal end, wherein the sample supply channel is configured and arranged such that a sample applied to the sample supply port flows by capillary force along a flow axis from the proximal end towards the distal end,
- a working electrode disposed on the insulating substrate and in fluid communication with the sample supply channel,
- a fill detection electrode disposed on the insulating substrate and in fluid communication with the sample supply channel wherein the fill detection electrode, wherein the fill detection electrode comprises a head region and a tail region, wherein the head region extends further laterally within the sample supply channel relative to the tail region, and wherein the head region is proximal to the sample supply port relative to the tail region, and
- a reagent layer covering at least the working electrode,
- wherein said fill detection electrode distal from the sample supply port of the sample supply channel relative to the working electrode,
- wherein L3 is lateral width of the head region of the fill detection electrode, wherein L3 is defined by the equation L3=L1−L2*2 or L3=L1−L2*1.5*2, wherein L1 is the distance between the pair of side walls of the sample supply channel and L2 is a gap provided between the head region of the fill detection electrode and the pair of side walls of the sample supply channel such that the head region does not contact the pair of side walls.
Dependencies are inferred from the claim text.