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Mask Alignment and Exposure
One of the most significant steps in the photolithography process is mask alignment. A mask or "photomask" is a square glass plate with a patterned emulsion of metal film on single side. The mask is aligned with the wafer, so that the pattern can be transfer onto the wafer surface. Every mask after the first one must be aligned to the last pattern.
Once the mask has been accurately allied with the pattern on the wafer's surface, the photo resist is exposed by the pattern on the mask with a high intensity ultraviolet light. There are three primary exposure methods: contact, proximity, and projection. They are shown in the figure below.
A pair of one cation and one anion missing in a crystal of the type AB is known as Schottky defect.
given the displacement vectors A(3^i-4^j+4^k)m and B(2^i+3^j-7k)m,find the magnitudes of the vectors (a)C=A+B and (b)D=2A-B,also expressing each in terms of its rectangular compone
What is Metallisation Metallisation : metalizing is the procedure of evaporating a film of metal onto products. Normally the same is done in vacuum, therefore called vacuum m
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A large tower is to be supported by a series of steel wires; it is estimated that the load on every wire will be 13,300 N (3000 lbf). Verify the minimum needed wire diameter, assum
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Linear Alkyl benzene (LAB) is produced by the alkylation of benzene with olefins (assuming all dodecane). Raw maw materials: Kerosene and benzene. The chemical plant design comp
Determination of lattice energy of a crystal using Born-Lande Equation
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