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1) Find the final yield for a nine-mask-level process in which the average fatal defect density per cm2 is 0.1 for four levels, 0.25 for four levels, and 1.0 for one level. The chip area is 50 mm2. Use Y = e-NDA (Note: N = #of levels, D=average number of defects/unit area, A=area of chip)
2) An optical lithographic system has an exposure power of 0.3 mW/cm2. The required exposure energy for a positive photoresist is 140 mJ/cm2 and for a negative photoresist is 9 mJ/cm2. Assuming negligible times for loading and unloading wafers, compare the wafer throughput for positive photoresist and negative photoresist.
A tree-phase, 60Hz, 5MVA synchronous generator has balanced line-to-line voltages of 8320V at its terminals. if the generator is supplying power to delta-connected, balanced load of 5MVA at a 0.8 lagging power factor
Suppose a data array has 30 numbers sorted from low to high already, where no two numbers are equal. We need to search whether any of the two randomly given key numbers, key1 and key2 is in the array. If yes, then find out the position index(es) f..
Briefly discuss the source of solar energy and the processes involved by which the earth receive 5.7kWh/m^2/day over the entire surface. If it becomes possible to simulate the same process on earth
Briefly explain your ideal job as electrical engineer? Why did you select this career? What goals do you have in this career? How do you plan to get these goals?
A newly planted tree is supported against the wind by a rope tied to a stake in the ground. The force of the wind, though distributed over the tree, is equivalent to a single force F. Find the tension in the rope
If R2 = 2R1, R3 = 3R1 and the total power taken by the circuit is 480 watts. Calculate the power in each resistor
Devise a detailed algorithm for a ring with p nodes so that each node would atttain the final sum of original node values. Determine the worst case communication steps for the algorithm.
Telephone signals are typically sampled at 8000 Hz. a. What is the time interval between samples b. What is the highest frequency that can be recovered from a sampled signal
Design a load resistor (resistance rating and power rating) network to have the transformer operate at full load. Design a second network for half load. You may need to combine several resistors to get the desired value.
Suppose you are designing a power amplifier for a loudspeaker which has an equivalent resistance of 150 . What should be the Thevenin equivalent resistance of the power amplifier in order to maximize the power transfer to the loudspeaker
A 10 cm length of a K-band copper waveguide is filled with a dielectric material with er = 2.55 and tan f = 0.0015. If the operating frequency is 15 GHz, find the total loss through the guide and the phase delay from the input to the output of th..
The relative dielectric constant of the printed circuit board (PCB) is 4 and the microstrip lines have a characteristic impedance of 80W. The length of the microstrip lines are 30mm and 45mm, respectively.
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