UV replication technology for micro optical applications and bonding challenges using active alignment

Demand in mobile application becomes higher and increasing functionality is the key for success in today's product design, more and more sensors will be built into this kind of new devices. As optical and imaging functions are considered core features, a lot of these new functions are realized using miniaturized or micro optics. In the last decade, micro optics manufacturing has reached a high level of confidence and is supposed to be one of the manufacturing technologies to address future requirements for even smaller and thinner devices. In this report we will look at the processes used in UV replication of micro optics, like micro lenses for wafer level cameras, as well as flash lenses for mobile phone LED applications. One of the key challenges when using final assembled micro optics is an accurate placement to the sensor unit. Results of printed micro lenses, as well as placement accuracy in active alignment processes will be shown.