Learn more about R&D chemical mechanical polishing by requesting our FREE informational CD.

Download our CMP White Paper


FREE subscription
Subscribe for free to receive each issue of Semiconductor Today magazine and weekly news brief.


11 December 2007


Seoul introduces industry's thinnest LED chip

Korean LED maker Seoul Semiconductor has has filed a patent application for what it claims is the world’s thinnest LED chip. The WH108 measures 1.6mm in width, 0.8mm in length and 0.17mm in height, 15% less than the industry’s thinnest LED chips currently (0.2mm).

The LED’s wafer-type substrate, which has been structurally precision-processed to improve optical efficiency, enables the chip to realize high luminous intensity and thermal characteristic. The WH108 delivers a luminous intensity of 240mcd, more than twice the brightness of existing LED chips at a current of 5mA.

Also, the WH108 is capable of producing the same brightness at a lower power, helping to extend the battery life of portable devices such as cell phones, digital cameras and laptops.

The ultra-thin package and high brightness suit applications in cell-phone keypad modules or touch pads, ultimately leading to thinner cell phones. However, enhanced thermal characteristic mean that the WH108 can also withstand and perform reliably in demanding environments including: small lights (inner lighting of refrigerator, automobile reading lamps); special illumination devices (endoscope illumination); and automobile dashboard lighting).

“The WH108 is a result of our continuous commitment to meet our customers` demand for thinner and brighter LED chips,” says Jeong Su Park, head of Seoul’s LED chip business division.

Prototype models in white, blue and green are available to cell-phone makers this month. Mass-production on a scale of more than 10 million LEDs per month will begin in first-quarter 2008.

Search: Seoul Semiconductor LEDs