SInce 1963, the R. D. Mathis Company has been fabricating high quality and innovative products for our customers in our facto ... ry located in Long Beach California. The R. D. Mathis Company specializes in the fabrication of high vacuum evaporation sources and materials for the thin film coating and metallizing industries. We offer a comprehensive selection of Tungsten, Molybdenum and Tantalum sources through our catalog as well as custom fabrication to meet your specific coating needs. High Purity evaporation materials including gold, silver, titanium, nickel, aluminum, etc. are also available in a variety of sizes, purities and quantities.. We also offer our "LV Series" Low Voltage, High Current Power Supplies which can deliver the power you need for completing your porcess and our "GP 100" Inert Gas Purifier to compliment your evaporation process. ISO9001 / AS9100 Certified read more