hi friend,
If you are looking for the job, then what will be your first question and what kind of answer you need to be prepared with??
Tell about your project?
- Explain a bit about your domain of your project like wireless, wire-line, microprocessor to name.
- What part of it you were involved in that project
- how many people were reporting to you
- who is your client or for whom you were doing this project?
- what is your roles and responsibilities in that project
- what all cores where present in that chip
- what is the technology like 130,90,65,45nm
- what is the clock-frequency
- how many clock-domains
- what is the voltage value
- what is the macro-count
- what is the flip-flop count
- what are the various analog macros
- how many pads were there
- what is your skew you had achieved
- what is your insertion delays
- what is your pll jitter
- how did you model your uncertainities or variations
- how many power-domains were there
- did you have multi-VDD
- if you had multi-VDD how did you handle insertion of level-shifters
- what is the SSN(simultaneous switching noise) pad ratios used in your design.
- how did you prevented noise in your chip
- how many placeable instances
- what is the cell-row utilization
- is your design pad-limited or core-limited
- did you multiplexed your pads
- what type of package wafer bond or flip-chip
- if flip-chip how did you distributed power bumps any special strategy
- how many metal layers in your technology
- did you used in house library or from any vendor
- what is the die-area of your chip
- what is the x and y
- did you had any rectilinear macros if so any thing special you did during floor-plan
- did your chip had multi-vt flow , yes or no
- if multi-vt how did you managed using it in synthesis
- what is the extraction process
- what are the various IO’s like PCI/SPI/SDIO/USB/….
- how many STA modes did you had
- did you run functional STA and Test STA
- did you balance test clocks
- did you chip test works on atspeed or low speed
- what is your scan-shift frequency
- how many test-modes do you have
- do you test analog macros during test
- do you have jtag mode
- how many plls do you have
- do you have fractional pll’s as well
- do you have DSP in your chip
- what are the various protocols used in your chip
- what is the maximum bus frequency in your chip
- do you have multiple masters and multiple slaves accessing your chip bus
- how did your bus arbitration logic work
- do you have soft resets
- do you synchronous your resets or not
- do you have latches in your chip
- how many power domains do you have
- what is the supply pad voltage
- do you used diodes to eliminate ESD
- how many layers do you do power-routing
- what is the layers you use for clock-routing
- do you do anything special for special nets in routing phase
- did you do routing timing driven or not
- did you enable signal integrity while routing
- did you validate SI based STA using PT-SI or some other tool
- what is the extra margin di dyou kept during synthesis phase
- how many ECO’s do you faced to close the timing or functional verification
- do you used to run formal verification to validate the handover RTL and netlist are fine
- did you checked antenna violation
- did you qualify your chip with GLS(gate level simulation)
- what is the package frame number
- how did you performed timing budgetting
- anything special you did to increase the yield
- how did you estimate your power-strips and meshes widths
- do you have different analog ground and digital ground if so for any reason or not
- do you short analog and digital grounds
- what is the type of mbist controllers you used
- did you run capture mode simulations
- do you used any test-compression logic in your chip
- what is your fanout tree count
- do you build tree scan-enable resets as-well
- did you used clock-gating logic
- how did you selected register widths to be gated
….
most of the above mentioned questions you can find answers in the website http://www.vlsichipdesign.com
all the best
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