For 33 years, DS Fibertech has been a recognized leader in the design and manufacture of Diffusion Furnace Cassettes and support insulation for wafer fabrication such as pyrometric torches, vestibule blocks and soft collars. Our offerings include direct replacement elements for all major OEM furnace tools both in traditional large wire style and in low mass, fast ramp versions ranging from 250C to 1250C. We offer ultra high temperature cassettes for vertical applications for high temperature annealing up to 1750C., cost savings vertical cassette refurbishment services and a team dedicated to both vertical and horizontal tool down cassette expedites.