Seoul Semiconductor

A South Korean LED specialist founded in 1987, leading the global market based on opto-semiconductor technology and patent competitiveness.

Seoul Semiconductor

Overview

Seoul Semiconductor (서울반도체) is a South Korean opto-semiconductor (LED) specialist founded in 1987. Centering on LED packages and modules, it supplies products to diverse fields such as lighting, displays, automotive, and mobile, and is recognized for its technological competitiveness in the global market through proprietary technologies including WICOP, Acrich, and SunLike. Its headquarters is in Ansan, Gyeonggi Province, and as a KOSDAQ-listed company, it has demonstrated its core technology through patent disputes with major global LED manufacturers.

Key Details

Founding and Growth

Seoul Semiconductor was founded in Seoul in 1987 and began with semiconductor distribution and LED component businesses. As the LED lighting market gained full momentum in the late 1990s, it focused on developing its own technologies, and in the 2000s it secured high-brightness LED and flip-chip technologies and entered the global supply chain. It was listed on KOSDAQ in 2006, and afterward established production and sales bases in China, Vietnam, the United States, Japan, and other locations.

Core Technologies and Products

WICOP (Wafer-level Integrated Chip on PCB): A proprietary platform that simplifies the package process and improves luminous efficiency by directly mounting the phosphor and chip on a PCB. It is widely applied to automotive headlamps, display backlights, and general lighting.
Acrich: An LED technology that can be driven directly by alternating current (AC) power, allowing lighting fixtures to be designed without a separate converter, reducing cost and volume.
SunLike: A natural-light LED that realizes a spectrum close to sunlight, drawing attention as a lighting solution that reduces eye strain and is friendly to circadian rhythms.
Automotive LEDs: It supplies vehicle light sources such as headlamps, daytime running lights (DRLs), and interior lighting, and has a product lineup that meets high-reliability and high-intensity requirements.
UV LED: It has entered the water treatment, air purification, and surface sterilization markets with ultraviolet LEDs for sterilization and purification.

Global Patent Competition

Seoul Semiconductor proved its core patent competitiveness by obtaining major winning rulings in long-running patent litigation with Japan's Nichia. In particular, it defended patents related to LED phosphors and package structures in the United States and Europe, and based on this expanded supply contracts with global customers. This patent portfolio is evaluated as a key asset for maintaining a technological gap with latecomers.

Production and Global Network

Its headquarters and research institute are located in Ansan, Gyeonggi Province, and it has production subsidiaries in Vietnam and China. It operates local sales subsidiaries in the United States, Europe, Japan, China, and other locations, establishing a global customer response system. Major customers include global lighting brands, automotive parts companies, and display manufacturers.

Management Philosophy and Sustainability

Under the vision of "Lighting the world with light," Seoul Semiconductor emphasizes its goal of contributing to carbon emission reduction through energy-efficient LEDs. It is carrying out activities that create social value, such as expanding eco-friendly lighting, saving lighting energy, and UV sterilization.

Latest Trends

As of 2024–2025, Seoul Semiconductor is focusing its capabilities on micro LED and automotive lighting. It is targeting the next-generation display market by securing patents related to micro LED chips for displays and transfer technologies, and is responding to demand for higher functionality in vehicle lamps as electric vehicles and autonomous vehicles spread. It is also strengthening its approach to the healthcare and hygiene markets through smart lighting and IoT-linked solutions and UV-C LED-based sterilization modules. In 2024, demand for high-efficiency LEDs increased thanks to stronger global lighting regulations and higher energy-efficiency standards, and Seoul Semiconductor expanded its WICOP-based high-power products and SunLike lighting lineup. In 2025, it is pursuing a strategy to increase cost competitiveness and supply stability through automation investment at its Vietnam production base. In addition, it continues to respond to patent disputes in the United States and Europe and is strengthening its intellectual property portfolio.