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A set of 4 µm wide windows are to be etched into a SiO2 film of thickness 0.8µm.
a) Find the dimension of the window, as measured at the top of the oxide, after ideal isotropic etching (i.e. no overetch). Draw a cross section of the window opening with the resist still on.
b) What is the dimension of the window at the oxide substrate interface.
c) Find the average slope of the window edge.
d) Repeat the above question a), b) and c) if the process was done with a 20% over-etch, assuming that the silicon is etched at 2% of the oxide etch.
e) what type of Si wafer (orientation) and chemical etchant would be needed to make a perfectly vertical wet etch for these 4 µm wide windows? Comment on the practicality of such an etch
This bar is made of AISI 1006 cold-drawn steel and is loaded by the forces F=0.55 kN and T=25.N.m. Use both the maximum-shear theory and the distortion-energy theory to design the bar diameter D.
The sampling frequency in a DSP system is fs=16 kHz. Anti-aliasing filter used in the system is the second-order Butterworth filter with cutoff frequency of fc=4.2 kHz. What is the percentage of aliasing level at the cutoff frequency
1. Draw the frequency spectrum at the output of the first balanced modulator. 2. If the filter is a low pass filter, draw the frequency spectrum at the output of the filter and amplifier.
Determine the maximum raw instantaneous data rate that can be provided to a single user in EDGE, assuming that a single time slot on a single GSM channel is available.
Let the random variable X denote the annual snow fall amount at a well known Utah ski resort. X has a normal distribution with mean 500 inches and standard deviation 50 inches. (a) What is the probability that in a given year the snow fall will be ..
Write a recursive function that given integer n, counts down from n to 1. When the count reaches 0,your function should also display "GO!" Write a recursive function that takes a character array and prints the array without the vowels.
A three-point symmetric moving average filter, referred to as a weighted moving average is of the form \(y[n]=b(ax[nu22121]+x[n]+ax[n+1])\) (a) Determine as a function of a and b the frequency response \(H(e^{j\omega})\) of this system.
A shopper in a supermarket pushes a cart with a force of 37 N directed at an angle of 25° below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed.
The main mission of this project is to design and build a tap changer which is going to be fitted to power transformers for regulation of the output voltage to required levels for the Micro Grid. The tap changer system will consist of 9 changers with..
An automatic automotive spray painting system consists of conveyors, spraying, dust and overspray extraction fans with electrostatic and water walls, finishing with baking ovens. This system is connected to a 415V, 50 Hz three phase and has been divi..
a) Describe the components and variables of the biological control apparatus involved in walking toward an object that can be seen on the horizon b) Why is walking a closed-loop operation
Allocate this block to 3 different customers. Customer 1 requires a block at least 10 addresses, customer 2 requires 254 addresses, customer 3 requires 2 addresses. Give a possible allocation of these subnets using the CIDR prefix notation.
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