libs.tech: Fix klayout extraction of diodes

Diodes were extracted at the wrong hierarchy level.
Matthias (KLayout author) was kind enough to debug this issue
and came up with this patch.

See related discussion :

https://www.klayout.de/forum/discussion/2605/device-extracted-at-wrong-level-of-hierarchy#latest

But as a summary, KLayout's booleans use the first argument's
hierarchy as reference. so it's important to make sure to use a
"cell local" layer/polygon as first argument to ensure extraction
at the proper level

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>

ihp-sg13g2/libs.tech/klayout/tech/lvs/rule_decks/diode_derivations.lvs

@@ -35,12 +35,12 @@ antenna_d_exc = pwell_block.join(salblock_drw)
 antenna_d_mk = recog_diode.not(antenna_d_exc)
 
 # ==== dantenna diode ====
-dantenna_n = activ.and(antenna_d_mk).not(psd_drw).not(nwell_drw)
-dantenna_p = pwell.and(antenna_d_mk).covering(dantenna_n)
+dantenna_n = antenna_d_mk.and(activ).not(psd_drw).not(nwell_drw)
+dantenna_p = antenna_d_mk.and(pwell).covering(dantenna_n)
 
 # ==== dpantenna diode ====
-dpantenna_p = pactiv.and(antenna_d_mk)
-dpantenna_n = nwell_drw.covering(dpantenna_p)
+dpantenna_p = antenna_d_mk.and(pactiv)
+dpantenna_n = dpantenna_p.inside(nwell_drw)
 
 # ==== schottky_nbl1 diode ====
 schottky_mk = recog_diode.and(thickgateox_drw).not(diode_exclude)

ihp-sg13g2/libs.tech/klayout/tech/lvs/sg13g2_full.lylvs

@@ -3531,12 +3531,12 @@ antenna_d_exc = pwell_block.join(salblock_drw)
 antenna_d_mk = recog_diode.not(antenna_d_exc)
 
 # ==== dantenna diode ====
-dantenna_n = activ.and(antenna_d_mk).not(psd_drw).not(nwell_drw)
-dantenna_p = pwell.and(antenna_d_mk).covering(dantenna_n)
+dantenna_n = antenna_d_mk.and(activ).not(psd_drw).not(nwell_drw)
+dantenna_p = antenna_d_mk.and(pwell).covering(dantenna_n)
 
 # ==== dpantenna diode ====
-dpantenna_p = pactiv.and(antenna_d_mk)
-dpantenna_n = nwell_drw.covering(dpantenna_p)
+dpantenna_p = antenna_d_mk.and(pactiv)
+dpantenna_n = dpantenna_p.inside(nwell_drw)
 
 # ==== schottky_nbl1 diode ====
 schottky_mk = recog_diode.and(thickgateox_drw).not(diode_exclude)