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Change manufacturing grid for streamout in IC613

tkhan

How can the manufacturing grid size be changed when streaming out in IC613? In IC5141 there was an option to set the grid size in DBUperUU but I can't find this option in IC613 and the fab is saying the design has been streamed out at the wrong grid size. Please advise.

Parents

  • Hi Tarek

    The cmd to use is not techGetMfgGridResolution. Manufacturing grid determines the precision of the coordinates of layout objects. E.g. if it is 0.05u, then all layout objects should have coordinates that are multiples of 0.05u. Otherwise, it becomes offgrid (e.g. 123.06u is bad, should be 123.05u or 123u or 123.1u ,etc).

    The cmd should be techGetDBUPerUU. E.g.

    techGetDBUPerUU(techid "maskLayout")

    The above cmd retrieves the DBUPerUU value for "maskLayout" from "viewTypeUnits" section of the techfile. If you convert the gds to ascii format, you can see the following line in the output file:

    size of data base units : 0.0005

    I have 0.0005 because my maskLayout DBUPerUU is 2000 (1/2000=0.0005). Here is what you need to do:

    a. Dump out the techfile
    b. Edit the DBUPerUU value for maskLayout in viewTypeUnits section
    c. Re-compile the techfile as a new library
    d. Use XScale to change the dimensions of the layout
    e. Stream out using the new tech lib

    It is better to modify the value in a backup tech lib to avoid messing up your setup.

    Best regards
    Quek

Reply

  • Hi Tarek

    The cmd to use is not techGetMfgGridResolution. Manufacturing grid determines the precision of the coordinates of layout objects. E.g. if it is 0.05u, then all layout objects should have coordinates that are multiples of 0.05u. Otherwise, it becomes offgrid (e.g. 123.06u is bad, should be 123.05u or 123u or 123.1u ,etc).

    The cmd should be techGetDBUPerUU. E.g.

    techGetDBUPerUU(techid "maskLayout")

    The above cmd retrieves the DBUPerUU value for "maskLayout" from "viewTypeUnits" section of the techfile. If you convert the gds to ascii format, you can see the following line in the output file:

    size of data base units : 0.0005

    I have 0.0005 because my maskLayout DBUPerUU is 2000 (1/2000=0.0005). Here is what you need to do:

    a. Dump out the techfile
    b. Edit the DBUPerUU value for maskLayout in viewTypeUnits section
    c. Re-compile the techfile as a new library
    d. Use XScale to change the dimensions of the layout
    e. Stream out using the new tech lib

    It is better to modify the value in a backup tech lib to avoid messing up your setup.

    Best regards
    Quek

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