In wearable microneedle systems, performance depends on more than sensor chemistry or electronics—it depends on micron-level mechanical precision. One of ZP’s patented innovations, WO 2022/043639, addresses a fundamental but often overlooked challenge: ensuring that microneedles and sensing components are perfectly aligned in depth and position during assembly, every time.
This patent protects a method that uses a controlled adhesive layer not just to bond components, but to actively set their final position. By pressing microneedle-bearing components into a precisely deformable adhesive before curing, ZP can accurately define how far each microneedle protrudes relative to the device base and the skin. This allows multiple microneedles—mounted on separate substrates if needed—to be aligned to the same insertion depth with high repeatability.
Why does this matter? Even small variations in microneedle depth can lead to inconsistent exposure to interstitial fluid, introducing measurement noise that has nothing to do with biology. ZP’s approach eliminates this variability at the manufacturing stage, ensuring uniform insertion, stable electrochemical contact, and more reliable data in real-world wear.
Beyond performance, the invention also enables scalable, lower-cost manufacturing. Instead of relying exclusively on complex monolithic MEMS structures, ZP can align individual microneedle components with high precision using standard pick-and-place equipment and low-temperature adhesives. This reduces yield loss, increases design flexibility, and supports modular architectures.
Within ZP’s broader wearable microneedle portfolio, this patent complements IP covering microneedle geometry, skin interfaces, adhesion systems, sensor preparation, calibration, and wearable fit. Together, these inventions form a system-level IP moat that protects not only how biomarkers are measured in the skin, but how wearable microneedle devices are manufactured, assembled, and made reliable at scale.
For partners working with ZP, this capability is not just a production detail—it is a strategic advantage. By engineering precision directly into the assembly process, ZP delivers wearable microneedle platforms where accuracy is built in from the very first micron.
