| http://www.w3.org/ns/prov#value | - In any case, the cover CTE may differ from the device CTE of the device by at least about 1 ppm/??? C. Optimally, the difference in the coefficients of thermal expansion is at least 2 ppm/??? C. In addition, the invention is particularly suited for instances in which the effective stiffness of the cover is substantially lower that of the device.
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