Kaijo
A Tokyo-based maker of wire bonders built on ultrasonic technology, focusing on aluminium wedge bonders for power semiconductors and automotive devices, together with ultrasonic cleaning systems.
カイジョー・Back-end and packaging equipment・Last updated: October 27, 2026
Overview
Kaijo is based in Tokyo and its core technology is ultrasonics. In semiconductors it makes wire bonders, especially aluminium wire and wedge bonders, as well as ball bonders.
Its bonders are used in volume production of power semiconductors and devices for cars and industrial equipment. The company also makes ultrasonic cleaning systems and belongs to the Shibuya group.
Business: Wire bonders and ultrasonic cleaning systems
Why it matters
- Wedge bonding uses ultrasonic energy to weld wire to the pad, so ultrasonic know-how carries over directly to bonder design.
- Electrification of vehicles increases demand for power module assembly, where heavy wire bonding is common.
Main products
- •Aluminium wire wedge bonders
- •Ball bonders
- •Ultrasonic cleaning systems
Sites in Japan
Head officeHeadquarters
Tokyo