NASA's National Aeronautics and Space Administration (NASA/NSSC) is seeking to procure Deep Reactive Ion Etching services for Single Crystal 4H-SiC, with the intention of issuing a sole source contract to BIOTRONICS, INC, the sole provider of this specialized service. The procurement involves fabricating a 4-inch, 350-micron thick wafer, which will be etched to create a 50-micron thick diaphragm, adhering to specific requirements for thickness uniformity and surface quality. This project is critical for advancing NASA's capabilities in materials processing and device fabrication, with performance expected at the NASA Glenn Research Center (GRC). Interested organizations may submit their capabilities and qualifications by 4:00 p.m. Central Standard Time on December 22, 2025, to Laura Quave at laura.a.quave@nasa.gov, as the government reserves the right to proceed with a sole source award based on the responses received.