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(1) Added a check for unclosed boundaries when reading GDS.

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This is diagnostic only and does not change the read-in
    behavior.
(2) ext2spice:  Corrected an error that had been introduced
    into version 8.3.171 that accidentally marks all devices
    as visited which causes all source/drain areas and
    perimeters to be output as zero.
(3) extract:  Sweeping changes to handling of fringe
    capacitance.  Removed the (recently added) "fringeshieldhalo"
    parameter from the tech file.  Reworked the fringe
    capacitance models based on results from the "capiche"
    project (github/RTimothyEdwards/capiche).  Fringe shielding
    is now done by clipping fringe at the boundary of a
    shielding shape, rather than trying to calculate the
    amount of shielding (as the "capiche" project proved this
    to be equivalent).  Values for partial fringing are modeled
    by atan(x), which like the sidewall (1/x) curve, extends to
    infinity and values are limited by the halo but do not
    otherwise depend on the halo.  Because of this, the halo can
    be made variable and controlled by the user for deciding on
    the tradeoff between accuracy and run time.  A new command
    option "extract halo" was added to allow this control over
    the halo distance.
This commit is contained in:
Tim Edwards
2023-01-27 11:47:37 -05:00
parent 8d08cb2f2f
commit 1a3caee376
10 changed files with 341 additions and 499 deletions
Download Patch File Download Diff File Expand all files Collapse all files
extract/ExtTech.c
+26 -10
View File
@@ -62,6 +62,12 @@ void extTechFinalStyle();
void ExtLoadStyle();
void ExtTechScale(int, int);
/* This is a placeholder value; it may be approximately
* constant across processes, or it may need to be set
* per process.
*/
#define FRINGE_MULT 0.02
/*
* Table used for parsing the extract section of a .tech file
* Each line in the extract section is of a type determined by
@@ -767,6 +773,7 @@ extTechStyleInit(style)
style->exts_sideOverlapCap[r][s] = (EdgeCap *) NULL;
style->exts_perimCap[r][s] = (CapValue) 0;
style->exts_overlapCap[r][s] = (CapValue) 0;
style->exts_overlapMult[r][s] = (float) 0;
TTMaskZero(&style->exts_overlapShieldTypes[r][s]);
style->exts_overlapShieldPlanes[r][s] = 0;
@@ -815,7 +822,6 @@ extTechStyleInit(style)
}
style->exts_sideCoupleHalo = 0;
style->exts_fringeShieldHalo = 0;
style->exts_stepSize = 100;
style->exts_unitsPerLambda = 100.0;
style->exts_resistScale = 1000;
@@ -1064,6 +1070,7 @@ ExtTechSimpleAreaCap(argc, argv)
TileType s, t;
TileTypeBitMask types, subtypes, shields;
CapValue capVal;
float multVal;
int plane1, plane2, plane3, pnum1, pnum2, pnum3;
PlaneMask pshield;
@@ -1096,7 +1103,11 @@ ExtTechSimpleAreaCap(argc, argv)
/* Part 1: Area cap */
for (t = TT_TECHDEPBASE; t < DBNumTypes; t++)
if (TTMaskHasType(&types, t))
{
ExtCurStyle->exts_areaCap[t] = capVal;
ExtCurStyle->exts_overlapMult[t][0] = (float) capVal * FRINGE_MULT;
ExtCurStyle->exts_overlapMult[0][t] = (float) capVal * FRINGE_MULT;
}
if ((plane2 == -1) && (ExtCurStyle->exts_globSubstratePlane == -1)) return;
else if (plane1 == plane2) return; /* shouldn't happen */
@@ -1182,6 +1193,8 @@ ExtTechSimpleAreaCap(argc, argv)
continue; /* redundant overlap */
ExtCurStyle->exts_overlapCap[s][t] = capVal;
ExtCurStyle->exts_overlapMult[s][t] = (float)capVal * FRINGE_MULT;
ExtCurStyle->exts_overlapMult[t][s] = (float)capVal * FRINGE_MULT;
ExtCurStyle->exts_overlapPlanes |= PlaneNumToMaskBit(plane1);
if (plane2 != -1)
ExtCurStyle->exts_overlapOtherPlanes[s] |= PlaneNumToMaskBit(plane2);
@@ -1561,6 +1574,8 @@ ExtTechSimpleOverlapCap(argv)
continue; /* redundant overlap */
ExtCurStyle->exts_overlapCap[s][t] = capVal;
ExtCurStyle->exts_overlapMult[s][t] = (float)capVal * FRINGE_MULT;
ExtCurStyle->exts_overlapMult[t][s] = (float)capVal * FRINGE_MULT;
ExtCurStyle->exts_overlapPlanes |= PlaneNumToMaskBit(plane1);
ExtCurStyle->exts_overlapOtherPlanes[s] |= PlaneNumToMaskBit(plane2);
TTMaskSetType(&ExtCurStyle->exts_overlapTypes[plane1], s);
@@ -2109,7 +2124,11 @@ ExtTechLine(sectionName, argc, argv)
capVal = aToCap(argv[2]);
for (t = TT_TECHDEPBASE; t < DBNumTypes; t++)
if (TTMaskHasType(&types1, t))
{
ExtCurStyle->exts_areaCap[t] = capVal;
ExtCurStyle->exts_overlapMult[t][0] = (float) capVal * FRINGE_MULT;
ExtCurStyle->exts_overlapMult[0][t] = (float) capVal * FRINGE_MULT;
}
break;
case CONTACT:
/* Contact size, border, spacing deprecated (now taken from */
@@ -2825,6 +2844,8 @@ ExtTechLine(sectionName, argc, argv)
continue;
}
ExtCurStyle->exts_overlapCap[s][t] = capVal;
ExtCurStyle->exts_overlapMult[s][t] = (float)capVal * FRINGE_MULT;
ExtCurStyle->exts_overlapMult[t][s] = (float)capVal * FRINGE_MULT;
ExtCurStyle->exts_overlapPlanes |= PlaneNumToMaskBit(p1);
ExtCurStyle->exts_overlapOtherPlanes[s]
|= PlaneNumToMaskBit(p2);
@@ -3012,11 +3033,7 @@ ExtTechLine(sectionName, argc, argv)
ExtCurStyle->exts_sideCoupleHalo = (int)dhalo;
break;
case FRINGESHIELDHALO:
/* Allow floating-point and increase by factor of 1000 */
/* to accommodate "units microns". */
sscanf(argv[1], "%lg", &dhalo);
dhalo *= (double)1000.0;
ExtCurStyle->exts_fringeShieldHalo = (int)dhalo;
/* This is deprecated. . . Ignore */
break;
case PERIMC:
DBTechNoisyNameMask(argv[2], &types2);
@@ -3471,6 +3488,7 @@ zinit:
style->exts_perimCap[r][s] *= scalefac;
style->exts_overlapCap[r][s] *= sqfac;
style->exts_overlapMult[r][s] *= scalefac;
for (ec = style->exts_sideOverlapCap[r][s]; ec != NULL;
ec = ec->ec_next)
ec->ec_cap *= scalefac;
@@ -3512,8 +3530,6 @@ zinit:
style->exts_sideCoupleHalo = (int)(((float)style->exts_sideCoupleHalo
/ dscale) + 0.5);
style->exts_fringeShieldHalo = (int)(((float)style->exts_fringeShieldHalo
/ dscale) + 0.5);
style->exts_stepSize = (int)(((float)style->exts_stepSize
/ dscale) + 0.5);
}
@@ -3530,7 +3546,6 @@ zinit:
/* needed, so normalize it back to lambda units. */
style->exts_sideCoupleHalo /= 1000;
style->exts_fringeShieldHalo /= 1000;
}
/*
@@ -3559,7 +3574,6 @@ ExtTechScale(scalen, scaled)
style->exts_unitsPerLambda = style->exts_unitsPerLambda * (float)scalen
/ (float)scaled;
DBScaleValue(&style->exts_sideCoupleHalo, scaled, scalen);
DBScaleValue(&style->exts_fringeShieldHalo, scaled, scalen);
DBScaleValue(&style->exts_stepSize, scaled, scalen);
for (i = 0; i < DBNumTypes; i++)
@@ -3591,6 +3605,8 @@ ExtTechScale(scalen, scaled)
style->exts_perimCap[i][j] /= scaled;
style->exts_overlapCap[i][j] *= sqn;
style->exts_overlapCap[i][j] /= sqd; /* Typo fixed in 7.2.57 */
style->exts_overlapMult[i][j] *= scalen;
style->exts_overlapMult[i][j] /= scaled;
// Do not scale sidewall cap, for while the value is
// per distance, the distance is referred to a separation