+ Post New Thread
Results 1 to 6 of 6
  1. #1
    Full Member level 1
    Points: 731, Level: 5

    Join Date
    Apr 2017
    Posts
    105
    Helped
    1 / 1
    Points
    731
    Level
    5

    Pads for MMWave/RF in Digital Process

    I am using a digital process to design MMWAVE and RF circuits.

    I need to design pads (for G S G probing).

    This is for over ten GHz.

    Any resources, papers or thesis on designing pads for these applications?

    •   AltAdvertisment

        
       

  2. #2
    Advanced Member level 5
    Points: 27,281, Level: 40
    BigBoss's Avatar
    Join Date
    Nov 2001
    Location
    Turkey
    Posts
    3,923
    Helped
    1179 / 1179
    Points
    27,281
    Level
    40

    Re: Pads for MMWave/RF in Digital Process

    You don't have too much choice..Read the Probe Manufacturer's Guide and place your pads.
    This a mechanical constraint, you cannot place your pads as you wish..



    •   AltAdvertisment

        
       

  3. #3
    Full Member level 1
    Points: 731, Level: 5

    Join Date
    Apr 2017
    Posts
    105
    Helped
    1 / 1
    Points
    731
    Level
    5

    Re: Pads for MMWave/RF in Digital Process

    @BigBoss,

    Thanks for your reply.

    First I have to make them though in the design kit. I understand I need to place them with proper pitch and so on.

    But what layers and so on do I use in the PDK and what guidance (papers, etc) is there for such designs.

    Thank you.



    •   AltAdvertisment

        
       

  4. #4
    Advanced Member level 5
    Points: 27,281, Level: 40
    BigBoss's Avatar
    Join Date
    Nov 2001
    Location
    Turkey
    Posts
    3,923
    Helped
    1179 / 1179
    Points
    27,281
    Level
    40

    Re: Pads for MMWave/RF in Digital Process

    Quote Originally Posted by Puppet123 View Post
    @BigBoss,

    Thanks for your reply.

    First I have to make them though in the design kit. I understand I need to place them with proper pitch and so on.

    But what layers and so on do I use in the PDK and what guidance (papers, etc) is there for such designs.

    Thank you.
    You have to surely use most upper layer .. Isn't it logical ??



  5. #5
    Full Member level 1
    Points: 731, Level: 5

    Join Date
    Apr 2017
    Posts
    105
    Helped
    1 / 1
    Points
    731
    Level
    5

    Re: Pads for MMWave/RF in Digital Process

    @BigBoss, thanks for your reply.

    Yes, I am aware of this.

    Here is a paper screenshot - 65nm CMOS Pads for MMWave Applications.

    Look the sectional view on the left and the top view on the right.

    Question is - the pads on the right and left of the top view - those are just connected to ground or what are they connected to (the ground pads).



    •   AltAdvertisment

        
       

  6. #6
    Advanced Member level 5
    Points: 10,776, Level: 24

    Join Date
    Apr 2014
    Posts
    1,698
    Helped
    669 / 669
    Points
    10,776
    Level
    24

    Re: Pads for MMWave/RF in Digital Process

    Yes, ground pads are connected to the substrate.

    You should block dummy metal fill under the signal pad.



--[[ ]]--