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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.

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  • Hi Tarek

    Actually this function has been removed in all IC6.1.x releases. As of the latest IC614.485, it is not possible to change dbuPerUU during streamout. There are some plans to put back this function but it would take some time, perhaps in IC615 or an even later release. It seems debatable as to whether a layout should be scaled during streamout because it might introduce some errors/loss of precision in the gds. That's why the function was removed. But some customer flows really does require this function (i.e. they don't want to use the standard value of 2000 dbuPerUU). Hence there is a possibility that this function might make a return.

    A possible workaround is as follows:
    a. Change the dbuPerUU value in the techfile
    b. Use XScale to magnify/shrink the design
    c. Stream out the design

    Please refer to $CDSHOME/doc/wincfg/wincfg.pdf for more details on XScale.

    Best regards
    Quek

Reply

  • Hi Tarek

    Actually this function has been removed in all IC6.1.x releases. As of the latest IC614.485, it is not possible to change dbuPerUU during streamout. There are some plans to put back this function but it would take some time, perhaps in IC615 or an even later release. It seems debatable as to whether a layout should be scaled during streamout because it might introduce some errors/loss of precision in the gds. That's why the function was removed. But some customer flows really does require this function (i.e. they don't want to use the standard value of 2000 dbuPerUU). Hence there is a possibility that this function might make a return.

    A possible workaround is as follows:
    a. Change the dbuPerUU value in the techfile
    b. Use XScale to magnify/shrink the design
    c. Stream out the design

    Please refer to $CDSHOME/doc/wincfg/wincfg.pdf for more details on XScale.

    Best regards
    Quek

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