ANALOG LAYOUT INTERVIEW QUESTIONS 1

         1)      Why we Need matching? Types of matching techniques? Explain?

         2)      Why we Need resister matching?

         3)      Where do you place the Antenna diode and what is the reason for it?

         4)      What is shielding, types of shielding techniques and where it will use?

         5)      Why shielding net is always connected to gnd ?

         6)      Virtuoso L and Virtuoso XL tool techniques?

        7)      What is the virtuoso version you have used?

        8)      What is the difference between MOSFET and BJT?
           
       9) why NMOS technology is preferred mor than PMOS technology?
       
     10)   Threshold voltage ?

       11)   What is ERC Checks  and softcheck errors?

        12)   How to fix the std call height?

        13)   What is end cap and decap ?

        14)   CMOS fabrication?

       15)   CMOS Characteristic?

       16)   BJT fabrication?

       17)   Explain ESD and ways to reduce it?

       18)   MOSFET Operation explain?

       19)   Explain BGR?
  

      20)   Why poly first fabricated than source/drain?

     21)   NMOS When resister, capacitor and diode?

     22)   Deep N Well Explain?

     23)   How PMOS and NMOS operate?

     24)   What are all density issues?

     25)   What is the difference between fingering and multiplier?

     26)   Main differences between analog and digital layouts?

      27)   LOD?

           STI? 

           EM & IR?

           WPE ?

           Body effect?

           crosstalk ?

            channal length modulation?

            op-amp ?

                ASIC Flow ?