a time temperature monitoring system and method for use with a microchip or similar structure . a disclosed system includes : a substrate having an active region ; a dopant source located proximate the active region ; an activation system for activating a diffusion of the dopant source into the active region ; and a set of spatially distributed electrodes embedded in the active region of the substrate , wherein the electrodes are configured to detect the diffusion in the active region at varying distances from the dopant source to provide time temperature information .