Spurred by the size and cost advantages of fingerprint sensors and a growing need for security, biometric fingerprint technology is being integrated into an increasing number of devices. With fingerprint sensors being integrated into millions of products that will be shipped globally, it’s important that the sensor system be able to function for any type of finger in any situation. For example, these sensors are found in rugged laptops used on construction sites, mobile phones deployed in humid locales, and door locks installed in cold Northern towns. This means that modern fingerprint sensors need to not only work with all skin types (dry, worn, calloused, or oily), but they also must be durable enough to survive in harsh outdoor environments.