Business Introduction
Contact Probes & Testing Fixtures Manufacturer
At Seiken Corporation, we design and manufacture critical components that power electronic inspection processes across industries.
Since 1984, we’ve been a trusted partner in contact probes, probe cards, IC sockets, and custom test fixtures—offering fully tailored solutions that align precisely with your testing requirements.
From the initial concept to the final build, we work closely with you to understand your challenges and deliver value-added ideas—not just products. With complete in-house production at our Nagano facility, we manage everything under one roof—design, machining, assembly, and inspection—allowing us to respond flexibly to everything from single prototypes to full-scale production runs.
We customize every element—from materials, tip geometry, and pitch to high-heat resistance to current capacity among others—so you get a test fixture built specifically for your needs, with the assurance of Made in Japan quality.
Major Clients
- Semiconductor Manufacturers
- Electronic Component Industries
- Equipment Manufacturers
- Test Houses
- Universities & Research Institutions
Seiken’s Technology
At Seiken, innovation isn’t an afterthought—it’s at the core of everything we do. We continuously advance the capabilities of our contact probes through custom engineering and forward-thinking design. Every solution is tailored to your exact application, and with each new project, we push the limits of precision to meet the demands of tomorrow’s technologies.
Precision Machining
Seiken provides high-precision machining services, capable of handling metal, resins, and ceramics. Our capabilities go far beyond just probe cards—we can support a wide range of applications. Even small-lot orders starting from one piece are welcome, so please don’t hesitate to consult us.
What sets Seiken apart
Domestic Manufacturing
End-to-End Domestic Manufacturing — from design and prototyping to precision machining, assembly, inspection, and shipping. This enables us to deliver rapid turnaround and, flexible lot sizes.
Technical Expertise
Whether you require ultra-fine pitches, lead-free designs, high-frequency capabilities, non-magnetic materials or high-temperature resistance, our technologies cover the full spectrum of inspection demands. With our mastery across applications, we support everything from next-generation semiconductors to automotive-grade electronics.
Innovative Proposals
With sales offices in Tokyo, Aichi, Osaka, Fukuoka, and Taiwan, our team listens deeply to your needs and delivers more than just answers. Our insight-driven engineering provides smarter approaches that streamline testing and boost performance. And for customers beyond Japan and Taiwan, we conduct thorough consultations via web meetings and digital channels—ensuring we capture your requirements and deliver tailored solutions no matter where you are.
Trusted Quality of “Made in Japan”
At our factory in Nagano City, every process is vertically integrated, allowing us to respond quickly—with flexibility and precision. Whether it’s a one-off prototype or high-volume production, our commitment to Japanese craftsmanship and quality remains constant.
