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feat(rfcmim Pycell): initial version (#305, #324)
Signed-off-by: Sergei Andreev <[email protected]>
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‎ihp-sg13g2/libs.tech/klayout/python/sg13g2_pycell_lib/__init__.py

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'dpantenna_code',
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'via_stack_code',
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'ptap1_code',
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'bondpad_code'
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'bondpad_code',
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'rfcmim_code'
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]
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def getProcessNames():

‎ihp-sg13g2/libs.tech/klayout/python/sg13g2_pycell_lib/ihp/rfcmim_code.py

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########################################################################
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#
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# Copyright 2025 IHP PDK Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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########################################################################
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__version__ = '$Revision: #3 $'
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from cni.dlo import *
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from .geometry import *
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from .utility_functions import *
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import math
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class rfcmim(DloGen):
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@classmethod
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def defineParamSpecs(self, specs):
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techparams = specs.tech.getTechParams()
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model = techparams['rfcmim_model']
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minLW = techparams['rfcmim_minLW']
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maxLW = techparams['rfcmim_maxLW']
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defLW = techparams['rfcmim_defLW']
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caspec = techparams['rfcmim_caspec']
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cmax = eng_string(CbCapCalc('C', 0, Numeric(maxLW), Numeric(maxLW), 'rfcmim'))
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C = CbCapCalc('C', 0, Numeric(defLW), Numeric(defLW), 'rfcmim')
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#ifdef KLAYOUT
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specs('Calculate', 'C', 'Calculate', ChoiceConstraint(['C', 'w', 'l', 'w&l']))
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specs('model', model, 'Model name')
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specs('C', eng_string(C), 'C')
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specs('w', defLW, 'Width')
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specs('l', defLW, 'Length')
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specs('wfeed', '3u', 'Feed width')
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specs('Cspec', caspec, 'Cspec [F/sqm]')
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specs('Wmin', minLW, 'Wmin')
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specs('Lmin', minLW, 'Lmin')
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specs('Cmax', cmax, 'Cmax')
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#else
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CDFVersion = techparams['CDFVersion']
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specs('cdf_version', CDFVersion, 'CDF Version')
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specs('Display', 'Selected', 'Display', ChoiceConstraint(['All', 'Selected']))
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specs('Calculate', 'C', 'Calculate', ChoiceConstraint(['C', 'w', 'l', 'w&l']))
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specs('model', model, 'Model name')
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specs('C', eng_string(C), 'C')
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specs('l', defLW, 'Length')
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specs('w', defLW, 'Width')
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specs('wfeed', '3u', 'Feed width')
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specs('Cspec', caspec, 'Cspec [F/sqm]')
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specs('Wmin', minLW, 'Wmin')
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specs('Lmin', minLW, 'Lmin')
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specs('Cmax', cmax, 'Cmax')
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specs('ic', '', 'Initial condition')
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specs('m', '1', 'Multiplier')
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specs('trise', '', 'Temp rise from ambient')
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#endif
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def setupParams(self, params):
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# process parameter values entered by user
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self.params = params
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self.w = Numeric(self.params['w'])
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self.l = Numeric(self.params['l'])
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self.wfeed = Numeric(self.params['wfeed'])
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self.C = eng_string(CbCapCalc('C', 0, self.l, self.w, 'rfcmim'))
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def genLayout(self):
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self.grid = self.tech.getGridResolution()
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self.techparams = self.tech.getTechParams()
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self.epsilon = self.techparams['epsilon1']
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w = self.w
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l = self.l
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wfeed = self.wfeed
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lu = GridFix(l*1e6)
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wu = GridFix(w*1e6)
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wf = GridFix(wfeed*1e6)
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#########################################################
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#
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# Layer Definitions
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#
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#########################################################
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textlayer = Layer('TEXT', 'drawing') # TEXT
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gndlayer = Layer('Metal1') # Metal1 used for ground ring
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tmlayer = Layer('TopMetal1') # Top Metal above MIM is TopMetal1
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bmlayer = Layer('Metal5') # Bottom metal below MIM is Metal5
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caplayer = Layer('MIM')
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vialayer = Layer('Vmim')
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pwellblock = Layer('PWell', 'block')
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cont = Layer('Cont')
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activ = Layer('Activ')
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psd = Layer('pSD')
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nolayer = 0
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#########################################################
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#
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# Generic Design Rule Definitions
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#
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#########################################################
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via_size = self.techparams['TV1_a']
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via_dist = self.techparams['TV1_b']
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cont_size = self.techparams['Cnt_a']
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cont_dist = self.techparams['Cnt_b']
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tm_over = self.techparams['TV1_d']
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#########################################################
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#
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# Device Specific Design Rule Definitions
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#
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#########################################################
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mim_over = self.techparams['Mim_c']
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via_over = self.techparams['Mim_d']
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#########################################################
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#
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# Main body of code
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#
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#########################################################
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#########################################################
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# Special dimensions for rfcmim
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#########################################################
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gnd_width = 2 # um, ground frame width
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gnd_over_bm = 3+gnd_width/2 # um, distance from ground frame to bottom plate
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feedox = GridFix((lu-wf)/2)
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feedoy = GridFix((wu-wf)/2)
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contactArray(self, nolayer, vialayer, 0, 0, lu, wu, via_over+tm_over, via_over+tm_over, via_size, via_dist)
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dbCreateRect(self, caplayer, Box(0, 0, lu, wu))
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dbCreateRect(self, tmlayer, Box(via_over, via_over, lu-via_over, wu-via_over))
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dbCreateRect(self, bmlayer, Box(-mim_over, -mim_over, lu+mim_over, wu+mim_over))
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dbCreateRect(self, bmlayer, Box(-mim_over, -mim_over, lu+mim_over, wu+mim_over))
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dbCreateRect(self, pwellblock, Box(-3, -3, lu+3, wu+3))
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dbCreateRect(self, tmlayer, Box(-5.6, feedoy, via_over, feedoy+wf))
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id1 = dbCreateRect(self, Layer('TopMetal1', 'pin'), Box(-5.6, feedoy, -3.6, feedoy+wf))
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MkPin(self, 'PLUS', 0, id1.bbox, id1.layer)
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dbCreateLabel(self, textlayer, Point(-4.6, feedoy+wf/2), 'PLUS', 'centerCenter', 'R90', Font.EURO_STYLE, 0.8)
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# no QRC up to Metal3 in entire device area
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dbCreateRect(self, Layer('Activ', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
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dbCreateRect(self, Layer('Metal1', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
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dbCreateRect(self, Layer('Metal2', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
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dbCreateRect(self, Layer('Metal3', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
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dbCreateRect(self, Layer('Metal4', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
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dbCreateRect(self, Layer('Metal5', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
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dbCreateRect(self, Layer('TopMetal1', 'noqrc'), Box(-5.6, -5.6, lu+5.6, wu+5.6))
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# the ring
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id1 = dbCreateRect(self, activ, Box(-3.6, -3.6, lu+3.6, wu+3.6))
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id2 = dbCreateRect(self, activ, Box(-5.6, -5.6, lu+5.6, wu+5.6))
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idlist = dbLayerXor(activ, id1, id2)
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dbDeleteObject(id1)
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dbDeleteObject(id2)
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id1 = idlist.getComp(0)
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dbCreateRect(self, bmlayer, Box(lu+5.6, feedoy, lu+0.6, feedoy+wf))
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id2 = dbCreateRect(self, Layer('Metal5', 'pin'), Box(lu+5.6, feedoy, lu+3.6, feedoy+wf))
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idlist = dbLayerXor(activ, id1, id2)
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dbDeleteObject(id1)
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MkPin(self, 'MINUS', 0, id2.bbox, id2.layer)
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x = (nth(0, id2.bbox) + nth(2, id2.bbox)) / 2
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y = (nth(1, id2.bbox) + nth(3, id2.bbox)) / 2
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dbCreateLabel(self, textlayer, Point(x, y), 'MINUS', 'centerCenter', 'R90', Font.EURO_STYLE, 0.8)
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# pSD ring
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ps_cutarea = dbCreateRect(self, psd, Box(-3.57, -3.57, lu+3.57, wu+3.57))
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ps_guardarea = dbCreateRect(self, psd, Box(-5.63, -5.63, lu+5.63, wu+5.63))
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psd_guardring = dbLayerXor(psd, ps_cutarea, ps_guardarea)
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dbDeleteObject(ps_cutarea)
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dbDeleteObject(ps_guardarea)
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# Metal1 ring
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id1 = dbCreateRect(self, gndlayer, Box(-3.6, -3.6, lu+3.6, wu+3.6))
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id3 = dbCreateRect(self, gndlayer, Box(-5.6, -5.6, lu+5.6, wu+5.6))
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id4 = dbLayerXor(gndlayer, id1, id3)
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dbLayerXor(gndlayer, id4, id2)
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dbDeleteObject(id1)
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dbDeleteObject(id3)
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dbDeleteObject(id4)
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# ring contacts
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contactArray(self, nolayer, cont, lu+3.6, -3.6, lu+5.6, feedoy, 0.36, 0.36, cont_size, cont_dist)
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contactArray(self, nolayer, cont, lu+3.6, feedoy+wf, lu+5.6, wu+3.6, 0.36, 0.36, cont_size, cont_dist)
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contactArray(self, nolayer, cont, -5.6, -3.6, -3.6, wu+3.6, 0.36, 0.36, cont_size, cont_dist)
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contactArray(self, nolayer, cont, -5.6, wu+3.6, lu+5.6, wu+5.6, 0.36, 0.36, cont_size, cont_dist)
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contactArray(self, nolayer, cont, -5.6, -5.6, lu+5.6, -3.6, 0.36, 0.36, cont_size, cont_dist)
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id1 = dbCreateRect(self, Layer('Metal1', 'pin'), Box(-5.6, -5.6, lu+5.6, -3.6))
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y = -4.6
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MkPin(self, 'TIE', 0, id1.bbox, id1.layer)
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dbCreateLabel(self, textlayer, Point(lu/2, y), 'TIE', 'centerCenter', 'R0', Font.EURO_STYLE, 1)
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dbCreateLabel(self, textlayer, Point(lu/2, wu+2), 'rfcmim', 'centerCenter', 'R0', Font.EURO_STYLE, 0.8)
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dbCreateLabel(self, textlayer, Point(lu/2, -2), 'C='+self.C, 'centerCenter', 'R0', Font.EURO_STYLE, 0.8)

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