Sierra Circuits has manufactured high-quality PCBs in Sunnyvale, CA since 1986, with all fabrication and assembly done in-house for speed, security, and full process control. We build rigid, flex, rigid-flex, HDI, microelectronics, and RF/microwave boards with controlled impedance and ITAR compliance. Our in-house model ensures first-pass success and faster turnarounds. We also support engineers with free design tools, guides, webinars, and SierraConnect—our community for learning and collaboration. | Sierra Circuits has been manufacturing high-quality printed circuit boards in Sunnyvale, CA since 1986, with all fabrication and assembly done in-house for full process control, security, and quick turnaround. We handle everything from standard to complex builds, including rigid, flex, rigid-flex, HDI, microelectronics, and RF/microwave PCBs with controlled impedance, while maintaining ITAR compliance for sensitive projects. Because everything happens under one roof, our customers trust us to deliver boards that work the first time, reducing costly redesigns and delays. Beyond manufacturing, we support engineers with free design tools like our Impedance Calculator and Stackup Designer, detailed design guides, webinars with industry experts, a blog covering practical design and manufacturing insights, and SierraConnect, our online community for engineers to learn and connect. At Sierra Circuits, we are here to help you design with confidence and build with precision so you can get your products to market faster.
Shengyi Technology
Based in Dongguan since 1985, Shengyi Technology Co, Ltd. (SYTECH) is a world leader in the development and production of laminates. The company maintains a high commitment to on-going R&D efforts and provides a complete portfolio of products ranging from composites to high reliability, thermal management, HSD and RF/PTFE laminate materials. Shengyi maintains a state-of-the art manufacturing facility in Dongguan where it manufactures FR4, CEM1, CEM3 and Prepreg. In addition, the company maintains laminate and prepreg manufacturing operations in Suzhou, Shannxi and Changshu. Shengyi’s products are used in single-sided, double-sided and multilayer printed circuit boards and the company’s global customer base spans a broad spectrum of markets including mobile phones, automotive, telecommunication equipment and higher-level electrical products. In 2016, Shengyi expanded its operations presence through the establishment of a dedicated U.S. facility that features a team of widely-known, highly-regarded laminate industry experts.
Serflex LLC
SERFLEX LLC is a U.S.-based manufacturer of flex and rigid-flex printed circuits & assemblies. The company also has a long history with flexible polyimide heaters. SERFLEX is a leader in UHDI design & manufacturing. SERFLEX delivers mission-critical solutions where signal integrity & reliability are of utmost importance.CORE CAPABILITIES• Flexible & Rigid-Flex Printed Circuits (1-16 layers)• UHDI processing with fine-line geometries (< 9 um)• Component / Connector Assembly• Polyimide Flexible Heaters (079 & 841 available)• Prototype to Mass Production supported• DFM / DFA engineering collaborationQUALITY & COMPLIANCE• ISO 9001 Certified• ITAR RegisteredADDITIONAL INFORMATION• REGISTERED SMALL BUSINESS• CAGE Code: 9D5K7• UEI: XWSLJ16UYJ44• NAICS: 334412 | 334414 | 334418 | 334419 | 335999
RCAL PRODUCTS
RCAL Products is an engineer-owned and driven PCBA manufacturer located in Northwest Arkansas. We provide high-quality printed circuit board assembly services, specializing in turnkey and consigned builds, rapid prototyping, and high-mix, low-to-mid volume production. Our engineering expertise allows us to offer practical DFM (Design for Manufacturability) guidance that helps customers move from concept to production faster and more efficiently. We support demanding applications across aerospace, industrial, and medical markets, with in-house Environmental Stress Screening (ESS) capabilities and medical-grade traceability systems to ensure performance and reliability. Each component, board, and assembly is barcoded for tracking, giving our clients the confidence and visibility they need throughout the process. At RCAL, we prioritize agility. Our sourcing, account management, and engineering teams work closely together to shorten lead times, reduce shipping costs, and respond quickly to design changes—providing the kind of support only an engineering-led manufacturer can deliver. | We are an engineer-owned PCB assembly manufacturer in NW Arkansas, leveraging 30+ years of experienced engineering support from concept to production. We optimize designs for manufacturability, reduce costs, and accelerate time to market. Our proprietary MRP system and barcoded components ensure medical-grade tracking, reliability and efficiency in every build. | RCAL Products is an American design engineering and electronics manufacturing company located in the Boston Mountains of Northwest Arkansas. Founded and operated by engineers, RCAL delivers end-to-end solutions that combine deep design expertise with world-class manufacturing capability.We offer comprehensive electronic product design, including schematic development, PCB layout, DFM, firmware support, and rapid prototyping. Our manufacturing capabilities include high-precision SMT assembly, advanced inspection and testing, and full box-build assembly. RCAL’s proprietary traceability platform tracks every PCBA to the component level, providing medical-grade visibility into material sources, process steps, and test results.Serving medical, aerospace, industrial, and IoT customers since 1995, RCAL is dedicated to helping teams accelerate development cycles, reduce risk, and bring reliable, high-quality electronic products to market with confidence.
Quad Industries
At Quad Industries, we specialize in delivering innovative medical wearables from concept to production, acting as a trusted one-stop shop for our partners in the healthcare industry. Our expertise in printed electronics and medical-grade materials ensures seamless integration from initial idea to final product, accelerating time-to-market for cutting-edge solutions. Our customer-centric approach focuses on addressing the unique needs of the healthcare sector, including strict regulatory requirements and enhanced patient comfort. With global manufacturing capabilities, we provide scalable, reliable production while maintaining cost-efficiency and uncompromising quality. – Innovative Medical Solutions: Expertise in electrode adhesives, wearables for diagnostics, monitoring and stimulation. – Regulatory Excellence: ISO 13485-certified processes for high-quality, healthcare solutions. – Tailored Solutions: Custom-engineered products to optimize patient comfort, improve outcomes, and reduce costs. – Sustainability and Process Efficiency: environmentally friendly manufacturing practices, certified under ISO 14001. Quad Industries brings the next generation of medical wearables to life, empowering healthcare providers and enhancing patient care.
QDOS
We are a Malaysian company manufacturing Flexible PCBs (FPC) & IC packaging substrates for Medical applications for past 30 years. We cater to ultra fine pitch (35um), >2 mtr lengths FPCs for various applications eg endoscopy, catheter, ultrasound, ADC imaging. Also do RTR manufacturing of high volume Ag/AgCl based disposable sensors. The manufacturing facility in Malaysia is certified to ISO13485 and other basic QMS/EMS/RBA requirements. ABF based FCBGA substrates are available for high IO count packaging needs.
Promex Industries
Promex Industries serves medical and bioscience organizations with heterogeneous contract manufacturing services that include combined IC and SMT assembly processes. In-house wafer thinning, dicing, wirebond, flip chip, surface mount, and overmolding, supported by a skilled engineering team, enable customers to fast-track products from concept to production. ISO 13485:2016 and ISO 9001:2015 registered.