Product/Process Fingerprint in Micro Manufacturing

The continuous miniaturization of products and the growing complexity of their embedded multifunctionalities necessitates continuous research and development efforts regarding micro components and related micro manufacturing technologies.Highly miniaturized systems manufactured using a wide variety of materials have found application in key technological fields such as healthcare devices micro implants mobility communications optics and micro electromechanical systems.Innovations required for the high-precision manufacturing of micro components can specifically be achieved through optimizations using post-process (i.e. offline) and in-process (i.e. online) metrology of both process input and output parameters as well as geometrical features of the produced micro parts. However it is of critical importance to reduce the metrology and optimization efforts since process and product quality control can represent a significant portion of the total production time in micro manufacturing.To solve this fundamental challenge research efforts have been undertaken in order to define investigate implement and validate the so-called product/process manufacturing fingerprint concept.The product manufacturing fingerprint concept refers to those unique dimensional outcomes (e.g. surface topography form error critical dimensions etc.) on the produced component that if kept under control and within specifications ensure that the entire micro component complies to its specifications.The process manufacturing fingerprint is a specific process parameter or feature to be monitored and controlled in order to maintain the manufacture of products within the specified tolerances.By integrating both product and process manufacturing fingerprint concepts the metrology and optimization efforts are highly reduced. Therefore the quality of the micro products increases with an obvious improvement in production yield.Accordingly this Special Issue seeks to showcase research papers short communications and review articles that focus on novel methodological developments and applications in micro- and sub-micro-scale manufacturing process monitoring and control as well as micro and sub-micro product quality assurance. Focus will be on micro manufacturing process chains and their micro product/process fingerprint towards full process optimization and zero-defect micro manufacturing.