Physical Design Engineer Interview Questions & Answers

10 Ways To Fix Setup and Hold Time Violations
What are the inputs of Physical design?
Why is Timing Analysis important in Physical Design?
What is the use of Shielding
Types of Variation in VLSI
Why do we use boundary cells?
How do you fix the static IR drop?
How to fix Dynamic IR drop?
Low Power Design Techniques Used in Physical Design
What is useful skew, local skew, and global skew?
Types of Cells for Physical Design
Explain all stages of Physical Design
Leakage Current in CMOS
What’s the difference between Design Rule Check (DRC) and Design for Manufacturability (DFM)?
Understanding Clock Topologies in Digital Logic Chips: Choosing Between Tree, Mesh, or Hybrid Designs”
DIBL GIDL BTBT and Tunneling Effect in CMOS Devices
What are the advantages of generating clocks internally?
List of Sanity Checks in Physical Design
Module Constraint Types: Guide, Fence, and Region
What are the inputs of LVS?
What is insertion delay?
Significance of Generated Clock and Virtual Clock
Why double via insertion?
What is the impact of IR drop in cell delay?
Antenna Effect in VLSI – Causes and Solution.
What is metal slotting?
Sources of on-chip variation (OCV)
Temperature Inversion on Lower Nodes
How does the virtual clock help in the physical design process?
What is CMP (chemical mechanical polishing)?
What is the dishing effect?
What is the content in the .lib, .lef & .tlef files
What is metal fill insertion?
What is input and output delay?
What are the OCV & AOCV?
How to fix setup and hold violations at a time?
What is cross-talk?
What are DRC & how will you fix them?
How to fix setup and hold violations?
What is the use of placement blockage?
Can virtual clock analysis accurately predict the timing of the physical implementation?
What are clock gating and power gating?
Reasons for Metastability in VLSI
How can you reduce dynamic power?
What are the types of physical verification?
Why is the generated clock necessary in physical design?
What is temperature inversion?
What are metal ECO and Base ECO?
Process Variation in VLSI
Process Corners in VLSI
Types of violations in LVS?
How to fix Electromigration (EM)?
What is the Clock Period and Levels of the Clock
Interview questions for experienced Physical Design Engineer
What are Physical design inputs in detail?
What is Electro migration and how to reduce it?
Difference Between Clock Skew and Uncertainty
What is the difference between ASIC and FPGA?
How to fix Dynamic IR drop?
Which parameters decide the Spacing between Macros
What is Dynamic Power?
What are the inputs of LVS?
What are the inputs for synthesis?
How to decide channel width between macros?
What information is presented in DEF?
What is the flow of your project?
How to fix setup violations?
What is HVT, LVT, and ULVT cells?
What is the difference between crosstalk delay and crosstalk noise?

 

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Physical Design Interview Questions

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