UV-lithographic patterning of micro-features on a conical mold insert

In past studies, several techniques have been employed to create microscopic features on relatively simple surfaces. Of these, lithography-based techniques have proven effective at manufacturing large fields of deterministic microasperities and microcavities on planar and cylindrical substrates. The present study focuses on adapting UV-lithography to a more complex substrate. Machined from stainless steel, a conical mold insert introduces an interesting geometry designed for the injection molding of radial lip seal elastomer. The distinct shape of this mold insert poises unique challenges to a conventional lithography procedure. Modifications to the process are incorporated into a three-day manufacturing treatment, and results are obtained through optical microscopy and light interferometry. By applying Design of Experiments (DOE) and Analysis of Variance (ANOVA), significant process variables are indentified. Based on these findings, refinements to the process are enabled and future considerations are made evident.

Autorentext

Justin P. Huber earned a Bachelor in Science degree in Mechanical Engineering in 2006 from the University of Kentucky. As an undergraduate, Justin earned academic scholarship and honorary engineering fraternity membership. As a graduate, he pursued studies in micro-manufacturing, and his continued interests focus on medical applications.