[SI-LIST] : Board Stackup setting in Mentor.

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From: In-myung Song (imsong@itx03.internex.co.kr)
Date: Wed Sep 06 2000 - 05:31:16 PDT


Hello news readers !.

I am trying to convert the Mentor Boardstation data to IS data.
But I met this error message in my .log file :
"d:/pilot/v5iu_ve/icx/V5IU_VE.ndd, line 53526: error: Layer PHYSICAL_27
cannot be a bottompad layer. A previous layer was bottompad layer."
The content of line number 53526 in V5IU_VE.ndd is like above :

%layer
%dielectric "above" above air 99949000 %positive;
%signal "PHYSICAL_1" SIGNAL_1 air 3302 copper %positive %topplace
%toppad ;
%signal "PHYSICAL_1" PAD_1 air 3302 copper %positive %topplace %toppad ;
%signal "PHYSICAL_1" PLACE_1 air 3302 copper %positive %topplace
%toppad;
%dielectric "core1" core1 fr4 18288 %positive;
%signal "PHYSICAL_2" SIGNAL_2 fr4 3302 copper %positive ;
%dielectric "core2" core2 fr4 18288 %positive;
%signal "PHYSICAL_3" SIGNAL_3 fr4 3302 copper %positive ;
%dielectric "core3" core3 fr4 18288 %positive;
%signal "PHYSICAL_4" SIGNAL_4 fr4 3302 copper %positive ;
%dielectric "core4" core4 fr4 18288 %positive;
%signal "PHYSICAL_5" SIGNAL_5 fr4 3302 copper %positive;
%dielectric "core5" core5 fr4 18288 %positive;
%signal "PHYSICAL_6" SIGNAL_6 air 3302 copper %positive %bottomplace ;
%signal "PHYSICAL_6" PAD_2 air 3302 copper %positive %bottomplace ;
%signal "PHYSICAL_6" PLACE_2 air 3302 copper %positive %bottomplace
%bottompad;
%dielectric "core6" core6 air 18288 %positive;
%power "PHYSICAL_7" POWER_1 air 3302 copper %negative ;
%power "PHYSICAL_7" POWER_2 air 3302 copper %negative ;
%power "PHYSICAL_7" POWER_3 air 3302 copper %negative ;
%power "PHYSICAL_7" POWER_4 air 3302 copper %negative ;
%dielectric "core7" core7 air 18288 %positive;
%power "PHYSICAL_8" POWER_1 air 3302 copper %negative ;
%power "PHYSICAL_8" POWER_2 air 3302 copper %negative ;
%power "PHYSICAL_8" POWER_3 air 3302 copper %negative ;
%power "PHYSICAL_8" POWER_4 air 3302 copper %negative ;
%dielectric "core10" core10 air 18288 %positive;
%power "PHYSICAL_11" POWER_5 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_6 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_7 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_8 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_9 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_10 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_11 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_12 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_13 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_14 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_15 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_16 air 3302 copper %negative ;
%power "PHYSICAL_11" POWER_17 air 3302 copper %negative ;
%dielectric "core11" core11 air 18288 %positive;
%power "PHYSICAL_12" POWER_5 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_6 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_7 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_8 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_9 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_10 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_11 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_12 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_13 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_14 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_15 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_16 air 3302 copper %negative ;
%power "PHYSICAL_12" POWER_17 air 3302 copper %negative ;
%dielectric "core13" core13 air 18288 %positive;
%signal "PHYSICAL_14" SIGNAL_7 air 3302 copper %positive;
%dielectric "core24" core24 air 18288 %positive;
%power "PHYSICAL_25" POWER_18 air 3302 copper %negative ;
%dielectric "core25" core25 air 18288 %positive;
%power "PHYSICAL_26" POWER_19 air 3302 copper %negative ;
%dielectric "core26" core26 air 18288 %positive;
%power "PHYSICAL_27" POWER_20 air 3302 copper %negative %bottompad ;
%dielectric "below" below air 99949000 %positive;

What can I repair this problem?
And addtionally, please let me know how to define or make the Artwork
order and Board Stackup in Mentor Graphics Boardstation.

Please help me !

If you have any knowhow or experiences about that, those things are very
helpful to me.
You are a great help.

        Inmyung.

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