+ Post New Thread
Results 1 to 7 of 7
  1. #1
    Newbie level 1
    Points: 155, Level: 2

    Join Date
    Oct 2015
    Posts
    1
    Helped
    0 / 0
    Points
    155
    Level
    2

    Required level of device physics

    Hi

    If I want to be an Analog designer (Discrete or IC) how much device physics is needed?

    Already done a semi-conductor physics course, but not devices (i.e First 6 chapters of Neamen's book and an intro to PN junction).

    Do I have to take a device course in order to be good analog engineer?

    Level: Undergraduate

    Thanks.

    •   AltAdvertisment

        
       

  2. #2
    Super Moderator
    Points: 50,996, Level: 55
    Achievements:
    7 years registered
    erikl's Avatar
    Join Date
    Sep 2008
    Location
    Germany
    Posts
    8,017
    Helped
    2607 / 2607
    Points
    50,996
    Level
    55

    Re: Required level of device physics

    Quote Originally Posted by thushianthan15 View Post
    ... Do I have to take a device course in order to be good analog engineer?
    Not necessarily, but it could be helpful, at least if you'd later decide to design analog ICs, and perhaps even create their layout.



  3. #3
    Advanced Member level 5
    Points: 17,986, Level: 32
    Achievements:
    7 years registered
    crutschow's Avatar
    Join Date
    Feb 2012
    Location
    L.A. USA Zulu -8
    Posts
    3,506
    Helped
    826 / 826
    Points
    17,986
    Level
    32

    Re: Required level of device physics

    If you ever want to do analog design at the chip level (designing IC chips), than a good foundation in device solid-state physics is likely necessary.
    Otherwise you can probably get by without it.
    Zapper
    Curmudgeon Elektroniker



    •   AltAdvertisment

        
       

  4. #4
    Super Moderator
    Points: 50,996, Level: 55
    Achievements:
    7 years registered
    erikl's Avatar
    Join Date
    Sep 2008
    Location
    Germany
    Posts
    8,017
    Helped
    2607 / 2607
    Points
    50,996
    Level
    55

    Re: Required level of device physics

    Quote Originally Posted by crutschow View Post
    Otherwise you can probably get by without it.
    Right, you probably can, because the DRC rules prevent that you'd violate necessary spacing regulations, determined by device physics. But an understanding of the DRC rules on a device physics base is very helpful in recognizing the reason for their violations' error messages, and thus for repairing those - or how to run them over .



  5. #5
    Advanced Member level 5
    Points: 17,986, Level: 32
    Achievements:
    7 years registered
    crutschow's Avatar
    Join Date
    Feb 2012
    Location
    L.A. USA Zulu -8
    Posts
    3,506
    Helped
    826 / 826
    Points
    17,986
    Level
    32

    Re: Required level of device physics

    Quote Originally Posted by erikl View Post
    Right, you probably can, because the DRC rules prevent that you'd violate necessary spacing regulations, determined by device physics. But an understanding of the DRC rules on a device physics base is very helpful in recognizing the reason for their violations' error messages, and thus for repairing those - or how to run them over .
    There's much more than DRC rules needed to design analog IC chips.
    You also need detailed models and understanding of the active device characteristics and an understanding of device physics is very helpful in that.
    Zapper
    Curmudgeon Elektroniker



    •   AltAdvertisment

        
       

  6. #6
    Advanced Member level 5
    Points: 36,229, Level: 46

    Join Date
    Mar 2008
    Location
    USA
    Posts
    5,824
    Helped
    1690 / 1690
    Points
    36,229
    Level
    46

    Re: Required level of device physics

    There's all kinds of analog design and you might be fine
    doing higher level work using only approved PDK elements
    if that's your thing. But if you need to cheat, then you
    need to "cheat smart" and part of that is being able to
    challenge the "No!" Posse (your device and reliability
    engineers) when they start mouthing dogma at you.
    Someone doing ESD and I/O design, or power management
    or trying to perform an analog function with as few devices
    as possible, will benefit from a gut understanding of device
    behavior and fragility, and what can be done by layout or
    by processing to improve what's on the plate. That, or
    learn to like the taste of macaroni and cheese and nothing
    but.



  7. #7
    Super Moderator
    Points: 50,996, Level: 55
    Achievements:
    7 years registered
    erikl's Avatar
    Join Date
    Sep 2008
    Location
    Germany
    Posts
    8,017
    Helped
    2607 / 2607
    Points
    50,996
    Level
    55

    Re: Required level of device physics

    Quote Originally Posted by crutschow View Post
    You also need detailed models and understanding of the active device characteristics and an understanding of device physics is very helpful in that.
    Yeah, would be awfully nice, if active device characteristics would find their way in cell models - usually it isn't so, unfortunately. (A semiconductor physicist - me).



--[[ ]]--