Photosensitive polyimides (PSPIs) are transforming RF microsystem design by enabling high-frequency performance, compact layouts, and simplified manufacturing. With their low dielectric constant, excellent thermal stability, and UV-patternable nature, PSPIs are ideal for RF filters, interconnects, and advanced packaging. As systems push into 6G and terahertz domains, PSPIs are proving to be an invisible yet indispensable design advantage.

At GHz speeds, even the cleanest schematic can fall apart if the layout isn’t field-aware. In thin-film circuits, every trace radiates, every gap couples, and parasitic effects can quietly sabotage performance. This guide breaks down what causes crosstalk and parasitics, why thin-film designs are especially vulnerable, and five proven strategies to stop them—before they cost you compliance, yield, or time.