Date of Award
Master of Science (MS)
Materials Science and Engineering
Angstadt, David C
This study assesses micro-feature replication at elevated mold temperature and ambient pressure using a variety of polymers. Moldings were made on the surface of stainless steel and silicon wafers containing features as small as 130 nm under isothermal conditions in a heated chamber by allowing polymer to spread over the features at ambient pressure. Feature replication was analyzed via AFM and SEM. Polymer behavior was characterized via melt contact angle and melt viscosity. While feature detail was well replicated, the moldings exhibited poor dimensional accuracy due to shrinkage. In general, polymers with low viscosity and surface tension comparable to the mold material showed better feature replication.
Thakur, Varun, "INFLUENCE OF TEMPERATURE AND POLYMER/ MOLD SURFACE INTERACTIONS ON MICRO-FEATURE REPLICATION AT AMBIENT PRESSURE IN MICRO INJECTION MOLDING" (2006). All Theses. 48.