Wearable Biosensor Device With Improved Microneedle Array Placement

A wearable biosensor device comprising

• a microneedle array comprising a substrate with microneedles disposed on the substrate, wherein at least one of the microneedles is configured as a working electrode to detect an electrical signal from a reaction with a target analyte exposed to the microneedle array in a biofluid of a body of a wearer, wherein the working electrode is functionalized with at least one chemical layer positioned on at least one of the microneedles and configured for producing an electrical signal from a reaction with the target analyte,
• an electronics unit underneath the substrate connected to the microneedles by a plurality of electrical interconnections,
• a force touch sensor configured to measure force applied during placement or anytime during the life of the device of the microneedle array into skin of a user, the force touch sensor connected electrically to the electronics unit,
• a placement validation system connected electrically to the electronics unit and configured to detect a change in conditions using bioelectronic measurement among microneedles outside the body and in a biofluid, and
• a feedback indicator connected electrically to the electronics unit and configured to provide to the wearer a notification of excessive or insufficient force in placement and/or of proper placement in the biofluid.