However, the depth of focus, or tolerance in wafer topography flatness, is reduced compared to the corresponding " dry " tool at the same resolution.
32.
Without it, the levels would become increasingly crooked, extending outside the depth of focus of available lithography, and thus interfering with the ability to pattern.
33.
Moreover, the simple formula will always err on the conservative side ( i . e ., depth of focus will always be greater than calculated ).
34.
The same factors that determine depth of field also determine depth of focus, but these factors can have different effects than they have in depth of field.
35.
In a camera, depth of focus indicates the tolerance of the film's displacement within the camera, and is therefore sometimes referred to as " lens-to-film tolerance ."
36.
Another common reason to employ a dual-speed focuser is with the use of short focal length eyepieces, where the depth of focus is short, requiring critically accurate focusing.
37.
In comparison with NSOM and ANSOM this method does not require any special equipment for tip positioning and has a large field of view and a depth of focus.
38.
Does this imply that The Third of May is a kind of superior journalism, the record of an incident in which depth of focus is sacrificed to an immediate effect?
39.
Therefore, often this insertion must be done in concert with stopping down the lens in order to compensate enough to make any shift negligible given a greater depth of focus.
40.
The dominant eye is mainly corrected for distance and intermediate vision and the non-dominant eye is corrected for intermediate and near vision, by increasing the depth of focus for each eye.
