A Vertically Integrated Approach to Sapphire Production

One of the things we take pride in at Rubicon Technology is our end-to-end manufacturing capabilities.

By having state-of-the-art facilities that support vertical integration, starting with the raw material aluminum oxide, we’re able to eliminate excess costs for our customers, and provide greater quality control to ensure the delivery of defect-free sapphire with diameters of 2, 4, 6, and soon, 8 inches.

This ultimately benefits LED chip manufacturers since high-quality, large-diameter wafers provide a higher yield and reduce costs of LEDs for commercial and residential use. Improved cost and luminous efficiency are fundamental to the acceleration of LED adoption in the marketplace — and continue to be strategic priorities for Rubicon.

The infographic below explains the basics of the six-step process of transforming sapphire into an LED module. Rubicon carries out steps 1 through 4 of the process — from crystal growth to wafer processing — before turning over to LED chip manufacturers.

We should also note that Rubicon recently started providing patterned sapphire substrates (PSS) to increase the LEDs’ light output by up to 30 percent. PSS is added directly prior to the epitaxial growth process.

The latter part of the process, after drilling, is primarily carried out in Rubicon’s facility in Malaysia. This facility enables Rubicon to reduce costs associated with making a 6-inch wafer.

For more info on the benefits of a vertically integrated approach, check out pages 50-55 of Compound Semiconductor’s March 2013 edition.