Manoj- Qualcomm Interview Questions

Qualcomm Bengaluru, Interview Questions, PD Profile Date:04-09-2020,Time:3:00PM 1.What is DPT in 16nm?? 2.Did you see DPT violations in your 16nm design? 3.What is the minimum metal pitch for your 16nm design? 4.How did you do placement? 5.Tell Me the Innovus Commands you used for Placement. 6.what was your tap cell distance in your design? 7.Consider a Scenario, Assume channel area is 100 microns, How many tap cells will sit in the channel area for each row? 8.Tell me what Innovus Commands did you use for Placing Tap cell? 9.Tell me what Innovus Commands did you use for Placing End Cap Cells? 10.Will there exists nwell taps in End cap cells? 11.what are the variants of filler cells present in your design? 12.1Xfiller, 2Xfiller what does "1X2X" Represents? 13.How do you rate your self for TCL Scripting? 14.Have you used any DBget Commands in your script? 15.In DBget commands, "dbget -p" "dbget -p1" "dbget -p2" what is "p p1 p2" in those commands? 16.Tell me what innovus commands you have used during CTS Stage 17.Take a Paper and Pen. consider a senario: A 300um wire has a wire delay of 300ps, I am adding a buffer exactly in the middle of the 300um wire. Now what is the total wire delay? 18.what are the coaxial Power Supplies in your design? 19.If there is Power Switch, How will you connect nwell tap to VDD for Tap cell if tap cell is nearer to Power Switch. will you directly nwell to VDD? 20.How did you balance skew to meet timing? 21.How did you implement skew groups? 22.what is custom routing? why it is needed? 23.How did you do custom routing? cant we do it using set_attribute Innovus Command? 24.your resume says that you fixed LVS Issue by virtually connecting the power port to match the logical netlist and layout netlist. How did you do it? 25.What are the Hold Corners did you use or observe when you reach signoff?