KIIT Deemed to be University SDT Quiz (Activity-5) Topic: Module-4 and Module-6 âąī¸ 20:00 đ 10 Questions 1 Registration & Summary âšī¸ Quiz Summary Main Topic Topic: Module-4 and Module-6 Questions 10 Items Time Limit 20 Minutes Negative Marking â None Name * Roll Number * Ready to begin? The timer starts immediately. đ Continue & Start Test 2 Quiz Questions Q1. When performing an experiment with 4 factors, each at 2 levels, a half-fractional factorial design (2 to the power of 4-1) requires how many experimental runs? 16 runs 4 runs 32 runs 8 runs Q2. Why did the semiconductor industry transition from Aluminum to Copper for metal interconnect lines? Copper is cheaper to mine Copper has lower electrical resistivity and higher resistance to electromigration Copper is easier to dry-etch than aluminum Copper does not oxidize Q3. What is the main function of the Lightly Doped Drain (LDD) region in a MOSFET? To reduce the peak electric field near the drain, thereby minimizing hot-carrier injection To serve as the primary contact point for interconnects To increase the total current of the transistor To increase the gate capacitance Q4. Which test structure is specifically designed to accurately measure the extremely low contact resistance between a metal interconnect and the silicon substrate? Ring Oscillator Kelvin contact structure Serpentine resistor Comb structure Q5. A typical barrier layer (such as Tantalum Nitride) is required to line the trench before depositing copper in the Damascene process. What is its primary function? To provide a shiny surface for lithography alignment To act as a dopant source To increase the resistance of the copper wire To act as an adhesion layer and prevent copper atoms from diffusing into the surrounding silicon and dielectric, which would ruin the chip Q6. In Statistical Process Control (SPC), what percentage of data falls within plus or minus 3 standard deviations from the mean in a perfectly normal distribution? 99.7 percent 95.4 percent 100 percent 68.2 percent Q7. What is the main trade-off or disadvantage of using a fractional factorial DOE instead of a full factorial DOE? It only tests one factor at a time It requires more experimental runs Main effects become confounded or aliased with higher-order interactions It cannot be used in semiconductor manufacturing Q8. What is the main objective of using low-k dielectrics as Inter-Layer Dielectrics (ILD) between metal interconnects? To provide structural rigidity To increase the breakdown voltage of the transistors To reduce the parasitic capacitance between adjacent metal wires, thereby reducing RC delay and crosstalk To increase the heat generation of the chip Q9. In semiconductor device physics, Subthreshold Swing (SS) is a critical parameter. What does a lower Subthreshold Swing value indicate? The transistor requires more voltage to turn on The transistor has higher resistance The transistor turns on more sharply and efficiently, requiring less gate voltage to increase the drain current The transistor is suffering from electromigration Q10. On a standard SPC control chart, which of the following is considered an out-of-control signal requiring engineering intervention? Data points fluctuating randomly around the mean A single point falling outside the 3-sigma control limits A normal bell-curve distribution of data Several points falling within the 1-sigma zone đ¯ Complete My Submission
