About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
|
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Study of Proximity Effect in Projection-based Micro Stereolithography Process |
Author(s) |
Aditya Chivate , Zipeng Guo, Chi Zhou |
On-Site Speaker (Planned) |
Aditya Chivate |
Abstract Scope |
Micro Projection-based stereolithography is a powerful technique that has the potential to disrupt microfabrication. However, a significant challenge that plagues µPSL is the local change in thresholds depending on the pitch between adjacent features, and having features in close spatial proximity generates undesired artifacts. This is termed as "proximity effect," which strongly limits the attainable fabrication resolution. This can be linked to pixel-pixel light interactions and is found to affect the process in spatial as well as temporal domains. Despite tormenting researchers for a long, not much has been done to study these effects in DLP printing. Models developed for laser-based systems can be used to explain the proximity effect in µPSL. However, they still rely on hindsight observations, fail to consider the effects of large area projection, and fail to explain how the local change in thresholds affects the part size. This research uses in-situ observation systems to study the spatial and temporal proximity effects in single-shot PSL microfabrication. We briefly illustrate the role of oxygen in the proximity effect and lay the foundations to better understand the proximity effect in periodic structures with micronic inter-feature distances. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |