While Google made a splash recently about making the Nexus Q media player in the US, companies all over the US are making key contributions of the economy by manufacturing in America. One of the key building blocks for LEDs is sapphire. Much like silicon is used for computer chips, sapphire is the foundation for an LED chip. Illinois-based Rubicon Technology is one of the world’s leading producers of sapphire ingots, blanks, polished substrates and windows. With more than 80% of the world’s LEDs based on sapphire, Rubicon makes a very important contribution to the market right here in the US.
Rubicon grows large sapphire crystals in sapphire furnaces in its Franklin Park, Batavia and Bensenville, Illinois-crystal growth facilities. The company makes very large sapphire crystals – bulk crystal ranging in size from 30 kg to 85 kg to 200 kg – that are cored and shipped to a Rubicon finishing facility in Malaysia or to directly to finishing customers throughout Asia to make sapphire wafers that and then made into millions of little LED chips. These LED chips are found in everything from smartphones, laptops and tablets, HDTVs, big ad displays, street lights, commercial lighting and even new LED light bulbs.
Why manufacture the sapphire crystals in the US? According to Rubicon, the crystal growth process is a high precision process that uses energy that must be kept constant. Any deviation in the power during the crystal growth process can lead to imperfections in a crystal rendering that crystal unusable.
Based on a decade of Rubicon company experience and decades of semiconductor expertise, Rubicon has custom-built next-generation crystal growth furnaces for their US plants. Rubicon’s innovations have resulted in industry-leading large-diameter sapphire wafers – six inches or more in size versus the commonly made two, three and four inch wafers – that help bring LED chip manufacturers cost efficiencies they can’t achieve with smaller wafers. To date, Rubicon has shipped 230,000 large diameter wafers.
“No other country in the world has reliable, low cost utilities like the US,” said William Weissman, CFO for Rubicon. “We specifically have designed our crystal growth facilities around reliable resources for power and water. The location in the US also allows us to protect our intellectual property inherent in our furnaces and processes in a way that cannot be maintained outside of the country.”