Sierra Midwest

Sierra Circuits is an ISO 9001:2015, ISO 13485:2016 and MilSpec MIL-PRF-55110, MIL-PRF-31032/1, MIL-PRF-31032/2 certified, Silicon Valley-based, high-technology Printed Circuit Boards manufacturer and Assembler. We specialize in quick turn PCBs and medium production. Unlike some PCB companies that are simply brokers/middlemen, we are the actual manufacturer and assembler of our PCBs. By owning our manufacturing and Assembly facilities, we control every aspect of the production schedule and quality. And this is why we can provide our customers unprecedented quality, reliability and a single point of support.

We continuously update our capabilities and equipment, like sophisticated direct imaging machines and laser drills, enabling us to do reliable and repeatable 3 mil trace /space with an aspect ratio of 10. We can make rigid PCBs up to 30 layers with board thickness of up to 250 mils (0.250"). Our high technology boards have features like HDI, Blind vias, Buried vias, Filled vias (via-in-pads), Controlled Impedance (with +/-5% tolerance), high aspect ratios and micro-BGAs. We regularly make specialty products with special materials. Other more complex boards we make include Burn-in Boards, Metal Core PCBs, boards with Carbon Print features, Backer boards, and rigid boards with Coverlay. We can do boards with multi-stage milling, step milling, laser milling and plated cavities. Our latest offerings include Flex PCBs, Rigid-flex PCBs, and Microelectronics PCBs down to 1 mil trace/space (some restrictions apply).