About us

Since our foundation as a semiconductor manufacturer in the Seiko Group in 1975, we have produced unique high value-added products centering on crystal oscillator ICs, including digital products,
Our main product, crystal oscillator ICs, have the largest share in the world and are incorporated in a variety of electronic equipment including communications devices and home appliances -- to support our daily lives.
In addition, recently we have emphasized development of sensor products, which sense movement and/or temperature objects and converts this into electrical signals.
One of our strengths is having our own plant where we conduct all aspects of product planning, design and manufacturing located in Nasushiobara, Tochigi Prefecture, a city located in the rich natural environment adjacent to Nikko National Park.
In addition to the development of analog LSIs, which we have worked on over many years, with the unchanging attitude since our inception of “pursuing precision,” with our strengths in the engineering foundation that integrates software elements, we will provide solutions to solve societal issues in the communications, medical, and industrial markets with devices.


We are a manufacturer of semiconductors, which are indispensable in all aspects of social infrastructure, including home appliances, communications, mobility, industry, and medical care.
The electronic device market, in which semiconductors are used, is expected to continue to expand in the future.
Since even a single device failure can lead to failure of the entire electronic device, we have a responsibility to meet the demand for high quality and reliability by instituting especially strict inspections in the development and production processes.
In addition, the risk of supply delays is minimized by thoroughly managing subcontractors with multiple suppliers regarding the supply chain, such as procurement, wafer manufacturing, and delivery.


Why are NPC crystal oscillator IC widely used?

Our strength is the point that signal processing is easier to accomplish on the customer side thanks to our unique noise reduction.
For crystal oscillator ICs, we have developed as many as 250 different types of specifications for full custom ICs, and have development experience and know-how spanning 40 years.
We have established the process of first sharing the image of the customer’s final product, and then performing factor development and design to realize the required features and functionalities based on that.

To a solution company that leverages semi-customization

To meet the diversifying needs of the market, a single product comes with multiple variations and the option to switch between them.
Customers can select the desired functionality and performance from a variety of options simply by specifying the option.
For example, you can select basic specifications such as input/output interface and amplifier gain, and even rewrite the software to match with various applications.
Our SEMIX products, which flexibly combine hardware and software options, provide optimal solutions for our customers.

*SEMIX: A coined word created from the letters of Semicustom Flexible Products.