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It is desired to etch out a region of a silicon dioxide film on the surface of a silicon wafer. The SiO2 film is 100 nm thick. The width of the etched-out area is specified to be 650 nm.
(a) If the degree of anisotropy for the etchant in the process is known to be 1.25, what should be the size of the opening in the mask through which the etchant will operate?
(b) If plasma etching is used instead of wet etching, and the degree of anisotropy for plasma etching is infinity, what should be the size of the mask opening?
Model a cup of coffee as a closed system containing 1 lbm of pure water at constant pressure of 14.7 psia. Using your knowledge of the 2nd Law, prove that it would be impossible for coffee at room temperature of 70 °F to heat up to 120 °F by receivin..
air flowing at 4x10-4kgs and 27 degrees c enters a sqaure duct that is 200mm on the side and 2m long. the duct surface
Air enters a turbine at 40 kN/m2, 900 C, and leaves at 10 kN/m2. The flow is reversible and adiabatic. Inlet velocity is quite low and outlet velocity is 150 m/s through a cross-sectional area of 0.20 m2. Calculate the power output in kW.
A simple way to construct an active filter is to start with a passive filter of the same type and add a voltage follower to the output. What is the purpose of such a voltage follower?
a person with a mass of 85 kg wearing snow skis is gliding down a long slope at an angle of 15 degrees. each ski is 185
Calculate the heat load for this building which consists of 3 floors, each floor has 2 apartments, and located at Jeddah city the total volume is 2100 m3 the total area is 700 m2 suppose there are 25 people, 6 computers, 6 refrigerators, 6 ovens, 6..
A metal block of mass 0.5kg is immersed in oil of density 850kg/m3, calculate the volume of oil that overflowed if the specific gravity of the block is 1.22.
fixed costfc 2000000 variable costvc 120.005q total costtc fc vc x q unit sales price p250nbspa determine the values
a thin-walled cylindrical gas vessel has a mean radius of 3 ft and a wall thickness of 12 in. the yield stress of the
the rope winds at a constant velocity of 5ms and the 3kg block b creates a force on the arm aa. how long does it take
A three-dimensional bow shock wave is generated by the Shuttle Orbiter during atmospheric re-entry. However, there is a region where the shock wave is essentially normal tot he freestream flow. The velocity of the shuttle is 7.62 km/s at an altitu..
Determine (a) the temperature of the air at the compressor exit, in 8C, and (b) the heat transfer, in kJ per kg of air flowing. (c) Sketch the process on p-y and T-s diagrams and associate areas on the diagrams with work and heat transfer, respect..
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