Yaw
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An angular deviation from ideal straight line motion, in which the positioning tables rotates around the Z (vertical) axis as it translates along its travel axis.
Source: FRT of America
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Yield
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Expressed in terms of a formula derived from Poisson Distribution, Y = e**-DPU, where e** means e raised to the power of, and DPU stands for Defects per Unit. Using this formula, one can readily predict the yield or incoming (to test) quality of a product. If, for example, you expect to have 0.25 faults per board from production, your incoming quality is e**(-0.25) = 77.9%.
Source: A.T.E. Solutions, Inc.
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The percent of functional units leaving a process. The lower the process yield, the higher the test coverage must be to keep DPM rates low.
Source: Mentor Graphics
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YIG-Tuned Oscillator
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A high precisioned signal generator in which electrons oscillate within a magnetic field established within a yttrium-iron-garnet (YIG) alloy by an electronic coil. The current and magnetic strength determines the oscillation frequency.
Source: Test & Measurement World, July 2002, page 15
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Young’s Modulus
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Modulus of elasticity; the amount of stress required to produce a unit change in length (strain). Expressed in pounds per square inch (PSI) or dynes per square cm.
Source: JML Optical
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