Crystal UNIT

The characteristics of a crystal unit vary significantly depending on the angle relative to the crystallographic plane. To achieve the desired angle and thickness that meet customer requirements, we use wire-saw cutting technology with our own original modifications. This technique involves high-speed reciprocation of a fine wire with abrasive grains, resulting in less cutting allowance than a blade saw and providing high productivity and cutting accuracy.

By lapping and polishing wafers cut with high precision, we can achieve even greater accuracy in outline shape and thickness. We ensure high cutting accuracy by using fixtures and tooling designed in-house and passing down our accumulated technology. For lapping, we use a double-sided lapping technique that offers high productivity, providing surfaces that meet customer needs, from a #4,000 finish to a mirror finish through polishing.

This technology cuts materials using the corrosive effects of chemicals such as hydrofluoric acid. It is an essential elemental technology for refining surfaces obtained by lapping or for successfully processing compact, high-precision crystal unit chips that are difficult to achieve through machining.

This assembly process provides piezoelectric devices with external electrical conduction. Assembly accuracy plays a crucial role in affecting quality, and to support this, we incorporate advanced technology in our automated machines, using reflow, lasers, and more, enabling mass production with minimal equipment. We also use various assembly methods depending on the product type, such as the adhesion method, which enhances the damper effect to stabilize oscillation.

Sealing plays a crucial role in preventing deterioration of product features during the manufacturing process. We adopt the most appropriate sealing method for each product, including the press-fit type, the adherence type that uses melted brazing filler metal on a lid, and resistance welding (seam welding), which seals by applying a current. The key to sealing is maintaining airtightness, and our advanced technology is fully utilized in this process.