SEM
At SEM, we specialize in Printed Circuit Board Assembly (PCBA), from design/layout to PCB assembly to Systems Level integration for organizations that drive innovation across the world’s most critical sectors. Our expertise at the intersection of data security and precision manufacturing enables OEMs and global leaders to meet the most stringent requirements with absolute confidence. From aerospace and defense to medical technology and Fortune 500 enterprises, SEM stands ready to support your mission with U.S.-based manufacturing, NSA-compliant solutions, and ISO/ITAR-compliant operations.
Specialized Services Designed for Critical Operations
SEM offers complete Printed Circuit Board Assembly (PCBA), from design/layout to PCB assembly to Systems Level integration solutions. Whether you require simple board assembly or complex systems integration, we bring your critical technology to life with precision craftsmanship and unwavering compliance. From rapid prototyping to full production runs, SEM is equipped to manage every phase of your build process with speed, security, and precision.
Industries We Proudly Serve
Why SEM?
Trusted By
“SEM has been a great manufacturing partner for close to 20 years! They have worked diligently with our engineering team to find solutions for our testing needs and regularly meet and exceed requirements for our product lines.”
Jennifer
Leader in Semiconductor Equipment Market
“Our experience with Streamline Electronics Mfg. (SEM) has been stellar. The trust, quality, and responsiveness of the team at SEM is second to none and we would not consider utilizing another contract manufacturing firm for our company’s needs”.
Greg
Customer for 6 years LED Lighting Solutions
“Streamline Electronics Manufacturing is a very reliable business partner from a quality, delivery, and cost perspective. Customer service is always a priority and representatives are very responsive to ensure that the customer’s needs are being met.”
Ron
Customer for over 20 years Leader in the Luxury Automotive Parts and Solutions
Frequently Asked Questions
General
SEM Inc. is a full-service contract manufacturer specializing in high-quality PCB assembly (PCBA), electronic manufacturing services (EMS), and product integration. From quick-turn prototypes to full-scale production, we support your product from concept to completion.
Our facilities are located in the United States, with headquarters in Fremont, CA. All of our manufacturing and assembly is done domestically for unmatched quality control, responsiveness, and supply chain security.
We proudly serve a wide range of industries including medical, aerospace, industrial automation, transportation, consumer electronics, and emerging tech sectors.
PCB Assembly
Yes. SEM provides both leaded and RoHS-compliant (lead-free) PCB assembly to meet your regulatory and application-specific needs.
Absolutely. Our flexible manufacturing model is designed to support high-mix, low-volume runs without compromising efficiency or quality—ideal for prototyping, pilot builds, and specialty products.
We specialize in surface mount (SMT), through-hole, and mixed-technology assemblies. We also offer fine-pitch placement, BGA, and complex multi-layer builds.
Capabilities & Quality
We are ISO 9001:2015 registered and follow strict IPC-A-610 standards. Our team is trained to deliver consistent, high-reliability builds that meet your industry’s specific requirements.
Every build goes through rigorous quality control including automated optical inspection (AOI), x-ray inspection for BGAs, functional testing, and in-circuit testing (ICT) when required.
Yes. SEM provides a full range of testing services including functional testing, flying probe, and conformal coating application to ensure your boards are protected and perform reliably in real-world conditions.
Prototyping & Production
Yes. We specialize in quick-turn PCB prototyping and early-stage development. Our team helps accelerate time-to-market by rapidly iterating and refining designs with precision and insight.
We do. Our engineering team works closely with customers to ensure that designs are optimized for manufacturing, helping reduce cost, improve performance, and shorten production timelines.
Lead times vary depending on project complexity, component availability, and order size. For standard prototypes, we offer turnarounds as fast as 3–5 business days. Full production runs are scheduled to align with your timeline and delivery needs.
Supply Chain & Materials
Yes. We offer full turnkey services, including component sourcing, BOM management, and supply chain coordination. We leverage long-standing vendor relationships and proactive sourcing strategies to minimize delays and control costs.
Absolutely. We offer consignment, turnkey, and hybrid material models. If you prefer to supply components, we’ll work with your inventory and integrate it seamlessly into production.
Our procurement team works closely with customers to identify equivalent alternatives or secure components through authorized distributors. Early engagement during the design and quoting process helps mitigate risk.
Engineering & Support
SEM Inc. offers full engineering support including Design for Manufacturability (DFM), Design for Test (DFT), reverse engineering, and failure analysis. We partner closely with your team to ensure a smooth transition from design to production.
Yes. One of our core strengths is scalable support. Whether you’re building one unit or 10,000, we offer a clear path to scale—maintaining quality, consistency, and timeline alignment every step of the way.
We do. SEM offers complete box-build and system integration services—including enclosure assembly, cable routing, mechanical assembly, labeling, packaging, and more.
Compliance & Security
Yes. In addition to ISO 9001:2015, we follow industry best practices and specific customer requirements for traceability, documentation, and regulatory compliance. Our quality system is built for critical applications, including medical and industrial.
Yes, we are ITAR-compliant with strict data and material handling protocols to support defense and aerospace customers.
Protecting your IP is a top priority. We operate with strict confidentiality agreements and internal controls to safeguard your designs, files, and manufacturing data throughout every phase of the project.
Quoting & Onboarding
You can request a quote through our website’s RFQ form or by contacting our sales team directly. For best results, include your BOM, Gerber files, assembly drawings, and quantity requirements.
Please include:
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- Bill of Materials (BOM)
- Gerber files
- Assembly drawings
- Pick-and-place files (if available)
- Quantities and delivery timeline
- Special testing or inspection requirements
Yes. Our team provides dedicated onboarding support to understand your project requirements, timelines, and long-term goals. We offer pre-production reviews, manufacturing consultations, and ongoing technical support.