Seiken – Your partner in precision semiconductor test solutions.

Seiken, founded in 1984, is a Japanese engineering and manufacturing company specializing in high-precision electrical contact solutions for semiconductor and electronic testing. Seiken designs and produces contact probes (single- and double-ended), advanced probe cards, IC test sockets, and test fixtures. With in-house production in Nagano, Seiken ensures reliable quality while providing end-to-end services from precision machining and PCB design to assembly. Its technologies support high-current, non-magnetic, Kelvin sensing, fine-pitch, and high-temperature applications. Serving the semiconductor, automotive, and related industries, Seiken supports both R&D and production volumes—turning customer ideas into reality and enabling testing success.