ASC Sunstone Circuits is a U.S.-based PCB manufacturer providing quick-turn prototypes, low- to mid-volume production, and complex fabrication solutions. Services include advanced HDI/UHDI, rigid, flex, and rigid-flex PCBs, assembly through partnership with Screaming Circuits, and seamless online quoting. Known for responsive service, engineering support, and fast turnaround, ASC Sunstone supports aerospace, defense, medical, industrial, and high-tech applications