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Description Of Business	9 Months Ended
Description Of Business	Oct. 02, 2011
Description of Business
Description Of Business	Description of Business Ultratech, Inc. (referred to herein as “Ultratech,” the “Company”, “we”, “our” or “us”) develops, manufactures and markets photolithography and laser thermal processing equipment designed to reduce the cost of ownership for manufacturers of integrated circuits and nanotechnology components located throughout North America, Europe, Japan, Taiwan, Korea, and the rest of Asia. We supply step-and-repeat photolithography systems based on one-to-one imaging technology. Within the integrated circuits industry, we target the market for advanced packaging applications. Within the nanotechnology industry, our target markets include thin film head magnetic recording devices, ink jet print heads, laser diodes and high-brightness light emitting diodes (“HBLEDs”). Our laser thermal processing equipment is targeted at advanced annealing applications within the semiconductor industry. In evaluating our business, we gave consideration to the Chief Executive Officer’s review of financial information and the organizational structure of our management. Based on this review, we concluded that, at the present time, resources are allocated and other financial decisions are made based on our consolidated financial information. Accordingly, we have determined that we operate in one business segment, which is the manufacture and distribution of capital equipment to manufacturers of integrated circuits and nanotechnology components.