Nuvoton Technology Corporation Japan announced the launch of its latest high-power violet laser diode, boasting an optical output of 4.5 watts at 402 nanometers, representing a 1.5-fold increase over its predecessor. The diode, designed for use in maskless lithography systems, will enter mass production in May.
The technological advancements in Nuvoton's new product are attributed to a proprietary device structure and enhanced heat dissipation capabilities. The expanded design features address common challenges faced by violet laser diodes, such as low wall-plug efficiency and thermal issues, which previously limited stable high-power operations.
By integrating this cutting-edge diode, Nuvoton aims to elevate production throughput in optical equipment used for advanced semiconductor packaging. The company's new offering is particularly significant for the rapidly-growing maskless lithography market driven by artificial intelligence demand, facilitating direct pattern exposure from design data and precise correction of substrate irregularities.
The laser diode also offers a viable semiconductor-based alternative to mercury lamps, catering to the needs of varying optical applications including photocuring, 3D printing, and sensing. This aligns with the industry's shift towards wavelengths near the mercury lamp i-line of 365 nm and h-line of 405 nm.
The new diode will be showcased at Nuvoton's booth during the Optics & Photonics International Exhibition (OPIE '26) in Yokohama, Japan, from April 22-24, 2026.