Biodegradable Polymer Micro Actuator with Multi-Degrees of Freedom Motion and Multi-Stage Response for Complete Implantable Medical Device and Robots

We developed a two-dimensional actuator made of biodegradable polymer which could two step movement due to two stages response of the reaction. The first stage occurs within several hours or days and the second one starts from several weeks or several months. This unique feature of biodegradable polymer like Poly Lactic Acid (PLA) can drastically upgrade the ability of the biodegradable polymer for the implantable medical device such as mass volume of anticancer drug for both long and short terms ejection. As well as the polymer science research, we succeeded to demonstrate micro actuator with multi-degrees of freedom motion. This result should deeply encourage to open various kind of biodegradable MEMS for future medicine.