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feat(rfcmim Pycell): initial version (#305, #324)
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Signed-off-by: Sergei Andreev <andreev@ihp-microelectronics.com>
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sergeiandreyev committed Jan 15, 2025
1 parent 087fd5c commit 7805332
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3 changes: 2 additions & 1 deletion ihp-sg13g2/libs.tech/klayout/python/sg13g2_pycell_lib/__init__.py
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'dpantenna_code',
'via_stack_code',
'ptap1_code',
'bondpad_code'
'bondpad_code',
'rfcmim_code'
]

def getProcessNames():
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225 changes: 225 additions & 0 deletions ihp-sg13g2/libs.tech/klayout/python/sg13g2_pycell_lib/ihp/rfcmim_code.py
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########################################################################
#
# Copyright 2025 IHP PDK Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
########################################################################

__version__ = '$Revision: #3 $'

from cni.dlo import *
from .geometry import *
from .utility_functions import *

import math

class rfcmim(DloGen):

@classmethod
def defineParamSpecs(self, specs):
techparams = specs.tech.getTechParams()

model = techparams['rfcmim_model']
minLW = techparams['rfcmim_minLW']
maxLW = techparams['rfcmim_maxLW']
defLW = techparams['rfcmim_defLW']
caspec = techparams['rfcmim_caspec']
cmax = eng_string(CbCapCalc('C', 0, Numeric(maxLW), Numeric(maxLW), 'rfcmim'))

C = CbCapCalc('C', 0, Numeric(defLW), Numeric(defLW), 'rfcmim')

#ifdef KLAYOUT
specs('Calculate', 'C', 'Calculate', ChoiceConstraint(['C', 'w', 'l', 'w&l']))
specs('model', model, 'Model name')

specs('C', eng_string(C), 'C')

specs('w', defLW, 'Width')
specs('l', defLW, 'Length')

specs('wfeed', '3u', 'Feed width')
specs('Cspec', caspec, 'Cspec [F/sqm]')
specs('Wmin', minLW, 'Wmin')
specs('Lmin', minLW, 'Lmin')
specs('Cmax', cmax, 'Cmax')
#else
CDFVersion = techparams['CDFVersion']
specs('cdf_version', CDFVersion, 'CDF Version')
specs('Display', 'Selected', 'Display', ChoiceConstraint(['All', 'Selected']))
specs('Calculate', 'C', 'Calculate', ChoiceConstraint(['C', 'w', 'l', 'w&l']))
specs('model', model, 'Model name')

specs('C', eng_string(C), 'C')

specs('l', defLW, 'Length')
specs('w', defLW, 'Width')

specs('wfeed', '3u', 'Feed width')
specs('Cspec', caspec, 'Cspec [F/sqm]')
specs('Wmin', minLW, 'Wmin')
specs('Lmin', minLW, 'Lmin')
specs('Cmax', cmax, 'Cmax')

specs('ic', '', 'Initial condition')
specs('m', '1', 'Multiplier')
specs('trise', '', 'Temp rise from ambient')
#endif

def setupParams(self, params):
# process parameter values entered by user
self.params = params
self.w = Numeric(self.params['w'])
self.l = Numeric(self.params['l'])
self.wfeed = Numeric(self.params['wfeed'])
self.C = eng_string(CbCapCalc('C', 0, self.l, self.w, 'rfcmim'))

def genLayout(self):
self.grid = self.tech.getGridResolution()
self.techparams = self.tech.getTechParams()
self.epsilon = self.techparams['epsilon1']

w = self.w
l = self.l
wfeed = self.wfeed

lu = GridFix(l*1e6)
wu = GridFix(w*1e6)
wf = GridFix(wfeed*1e6)

#########################################################
#
# Layer Definitions
#
#########################################################

textlayer = Layer('TEXT', 'drawing') # TEXT
gndlayer = Layer('Metal1') # Metal1 used for ground ring
tmlayer = Layer('TopMetal1') # Top Metal above MIM is TopMetal1
bmlayer = Layer('Metal5') # Bottom metal below MIM is Metal5
caplayer = Layer('MIM')
vialayer = Layer('Vmim')
pwellblock = Layer('PWell', 'block')
cont = Layer('Cont')
activ = Layer('Activ')
psd = Layer('pSD')

nolayer = 0

#########################################################
#
# Generic Design Rule Definitions
#
#########################################################

via_size = self.techparams['TV1_a']
via_dist = self.techparams['TV1_b']
cont_size = self.techparams['Cnt_a']
cont_dist = self.techparams['Cnt_b']
tm_over = self.techparams['TV1_d']

#########################################################
#
# Device Specific Design Rule Definitions
#
#########################################################

mim_over = self.techparams['Mim_c']
via_over = self.techparams['Mim_d']

#########################################################
#
# Main body of code
#
#########################################################

#########################################################
# Special dimensions for rfcmim
#########################################################
gnd_width = 2 # um, ground frame width
gnd_over_bm = 3+gnd_width/2 # um, distance from ground frame to bottom plate
feedox = GridFix((lu-wf)/2)
feedoy = GridFix((wu-wf)/2)

contactArray(self, nolayer, vialayer, 0, 0, lu, wu, via_over+tm_over, via_over+tm_over, via_size, via_dist)
dbCreateRect(self, caplayer, Box(0, 0, lu, wu))
dbCreateRect(self, tmlayer, Box(via_over, via_over, lu-via_over, wu-via_over))
dbCreateRect(self, bmlayer, Box(-mim_over, -mim_over, lu+mim_over, wu+mim_over))
dbCreateRect(self, bmlayer, Box(-mim_over, -mim_over, lu+mim_over, wu+mim_over))
dbCreateRect(self, pwellblock, Box(-3, -3, lu+3, wu+3))
dbCreateRect(self, tmlayer, Box(-5.6, feedoy, via_over, feedoy+wf))
id1 = dbCreateRect(self, Layer('TopMetal1', 'pin'), Box(-5.6, feedoy, -3.6, feedoy+wf))
MkPin(self, 'PLUS', 0, id1.bbox, id1.layer)
dbCreateLabel(self, textlayer, Point(-4.6, feedoy+wf/2), 'PLUS', 'centerCenter', 'R90', Font.EURO_STYLE, 0.8)

# no QRC up to Metal3 in entire device area
dbCreateRect(self, Layer('Activ', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
dbCreateRect(self, Layer('Metal1', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
dbCreateRect(self, Layer('Metal2', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
dbCreateRect(self, Layer('Metal3', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))

dbCreateRect(self, Layer('Metal4', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
dbCreateRect(self, Layer('Metal5', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
dbCreateRect(self, Layer('TopMetal1', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))

# the ring
id1 = dbCreateRect(self, activ, Box(-3.6, -3.6, lu+3.6, wu+3.6))
id2 = dbCreateRect(self, activ, Box(-5.6, -5.6, lu+5.6, wu+5.6))
idlist = dbLayerXor(activ, id1, id2)
dbDeleteObject(id1)
dbDeleteObject(id2)

id1 = idlist.getComp(0)

dbCreateRect(self, bmlayer, Box(lu+5.6, feedoy, lu+0.6, feedoy+wf))
id2 = dbCreateRect(self, Layer('Metal5', 'pin'), Box(lu+5.6, feedoy, lu+3.6, feedoy+wf))

idlist = dbLayerXor(activ, id1, id2)
dbDeleteObject(id1)
MkPin(self, 'MINUS', 0, id2.bbox, id2.layer)
x = (nth(0, id2.bbox) + nth(2, id2.bbox)) / 2
y = (nth(1, id2.bbox) + nth(3, id2.bbox)) / 2

dbCreateLabel(self, textlayer, Point(x, y), 'MINUS', 'centerCenter', 'R90', Font.EURO_STYLE, 0.8)

# pSD ring
ps_cutarea = dbCreateRect(self, psd, Box(-3.57, -3.57, lu+3.57, wu+3.57))
ps_guardarea = dbCreateRect(self, psd, Box(-5.63, -5.63, lu+5.63, wu+5.63))
psd_guardring = dbLayerXor(psd, ps_cutarea, ps_guardarea)
dbDeleteObject(ps_cutarea)
dbDeleteObject(ps_guardarea)

# Metal1 ring
id1 = dbCreateRect(self, gndlayer, Box(-3.6, -3.6, lu+3.6, wu+3.6))
id3 = dbCreateRect(self, gndlayer, Box(-5.6, -5.6, lu+5.6, wu+5.6))
id4 = dbLayerXor(gndlayer, id1, id3)
dbLayerXor(gndlayer, id4, id2)
dbDeleteObject(id1)
dbDeleteObject(id3)
dbDeleteObject(id4)

# ring contacts
contactArray(self, nolayer, cont, lu+3.6, -3.6, lu+5.6, feedoy, 0.36, 0.36, cont_size, cont_dist)
contactArray(self, nolayer, cont, lu+3.6, feedoy+wf, lu+5.6, wu+3.6, 0.36, 0.36, cont_size, cont_dist)

contactArray(self, nolayer, cont, -5.6, -3.6, -3.6, wu+3.6, 0.36, 0.36, cont_size, cont_dist)
contactArray(self, nolayer, cont, -5.6, wu+3.6, lu+5.6, wu+5.6, 0.36, 0.36, cont_size, cont_dist)
contactArray(self, nolayer, cont, -5.6, -5.6, lu+5.6, -3.6, 0.36, 0.36, cont_size, cont_dist)

id1 = dbCreateRect(self, Layer('Metal1', 'pin'), Box(-5.6, -5.6, lu+5.6, -3.6))
y = -4.6

MkPin(self, 'TIE', 0, id1.bbox, id1.layer)
dbCreateLabel(self, textlayer, Point(lu/2, y), 'TIE', 'centerCenter', 'R0', Font.EURO_STYLE, 1)
dbCreateLabel(self, textlayer, Point(lu/2, wu+2), 'rfcmim', 'centerCenter', 'R0', Font.EURO_STYLE, 0.8)
dbCreateLabel(self, textlayer, Point(lu/2, -2), 'C='+self.C, 'centerCenter', 'R0', Font.EURO_STYLE, 0.8)

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