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sentaurus Èí¼þCVÇúÏߵķÂÕæÎÊÌâ

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sentaurus Èí¼þCVÇúÏߵķÂÕæÎÊÌâ-1


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;*************************************************************************
; Setting parameters
; - lateral
(define Ltot 0.5)     ; [um] Lateral extend total

; - layers
(define Hox  5e-3)     ; [um] oxide thickness
(define Hepi 1.0)    ; [um] epi thickness

; - Doping
(define Depi 5e16)   ;  doping of epi

;----------------------------------------------------------------------
; Derived quantities
(define Xmax (/ Ltot 2.0))

(define Yox Hox)
(define Yepi (+ Yox Hepi))

;********************************************************************************
; Overlap resolution: New replaces Old
(sdegeo:set-default-boolean "ABA"

;*******************************************************************************
; Creating epi
(sdegeo:create-rectangle
  (position (* Xmax -1.0) Yepi 0.0 )
  (position    Xmax       Yox  0.0 )
  "GaAs" "region_1"
)

; Creating oxide
(sdegeo:create-rectangle
  (position (* Xmax -1.0) Yox 0.0 )
  (position    Xmax       0.0 0.0 )
  "HfO2" "region_2"
)

;************************************************************************

; Contact declarations
(sdegeo:define-contact-set "gate"
  4.0  (color:rgb 1.0 0.0 0.0 ) "##"

(sdegeo:define-contact-set "sub"
  4.0  (color:rgb 0.0 1.0 0.0 ) "##"

;----------------------------------------------------------------------
; Contact settings
(sdegeo:define-2d-contact
(find-edge-id (position 0.0 0.0 0.0))
"gate" )

(sdegeo:define-2d-contact
(find-edge-id (position 0.0 Yepi 0.0))
"sub"
;------------------------------------------------------------------------
; Separating lumps
(sde:assign-material-and-region-names "all"

;***********************************************************************
(sde:add-material
  (find-body-id (position  0.0 (* 0.5 (+ Yepi Yox))  0.0))
  "GaAs" "R.epi"


;----------------------------------------------------------------------
; Profiles:

; - EPI
(sdedr:define-constant-profile "Const.SiEpi"
"PhosphorusActiveConcentration" Depi )
(sdedr:define-constant-profile-region  "PlaceCD.SiEpi"
"Const.SiEpi" "R.epi" )

;*********************************************************************************
; Meshing Strategy:
; epi
(sdedr:define-refinement-size "Ref.Substrate"
  0.05      0.05     
  0.02      0.02    )
(sdedr:define-refinement-region "RefPlace.Substrate"
"Ref.Substrate" "R.epi" )

;  Multibox
;(sdedr:define-refinement-window "MBWindow.Channel_1"
; "Rectangle"  
; (position (* Xmax -1.0)  (+   0.3e-3  Yox)        0.0)
; (position    Xmax        (+  -0.3e-3  Yox)        0.0) )
;(sdedr:define-multibox-size "MBSize.Channel_1"
;  0.02   0.1e-3
;  0.01   0.05e-3
;  1.0          1.0 )
;(sdedr:define-multibox-placement "MBPlace.Channel_1"
; "MBSize.Channel_1" "MBWindow.Channel_1" )

;  Multibox
(sdedr:define-refinement-window "MBWindow.Channel_2"
"Rectangle"  
(position (* Xmax -1.0)  (+ 80e-3  Yox)        0.0)
(position    Xmax        0.0                   0.0) )
(sdedr:define-multibox-size "MBSize.Channel_2"
  0.02   1e-3
  0.01   0.5e-3
  1.0          1.0 )
(sdedr:define-multibox-placement "MBPlace.Channel_2"
"MBSize.Channel_2" "MBWindow.Channel_2" )

;*****************************************************************************
(sde:build-mesh "mesh" "-F tdr" "n1_msh"

·ÂÕæÎļþ£º
  Device NMOS {

  Electrode {
    { Name="gate"      Voltage=0.0  Barrier=-0.0 }
    { Name="sub"       Voltage=0.0 }
  }

  File {
      Grid    = "@tdr@"
      Current = "@plot@"
      Plot    = "@tdrdat@"
  }

Physics {
          Temperature=300
          EffectiveIntrinsicDensity(OldSlotboom)
          IncompleteIonization
          Mobility(
              DopingDependence                 
              CarrierCarrierScattering      
              HighFieldsaturation(GradQuasiFermi)
              Enormal(Lombardi_highk)
              IncompleteIonization         
             )
             Recombination(
             SRH(DopingDep)
             Auger
             TrapAssistedAuger
             surfaceSRH
             )
}

}

  Plot {
      SRHRecombination
      SurfaceRecombination
      eMobility  hMobility
      eDensity hDensity eCurrent hCurrent
      ElectricField eEparallel hEparallel
      eQuasiFermi hQuasiFermi
      Potential Doping SpaceCharge
      DonorConcentration AcceptorConcentration
  }
}
Math {
      Extrapolate
      RelErrControl
      Notdamped=50
      Iterations=20
}

Physics (Materialinterface="GaAs/HfO2" {
Traps(
(Acceptor Exponential fromCondBand Conc=1e14        EnergyMid=0    EnergySig=0.05 )
(Acceptor Exponential fromCondBand Conc=1.6487e12   EnergyMid=0    EnergySig=1.43 )

(Donor    Exponential fromValBand  Conc=1e14        EnergyMid=0    EnergySig=0.05 )
(Donor    Exponential fromValBand  Conc=1.6487e12   EnergyMid=0    EnergySig=1.43 )
     )
}

File {
      Output    = "@log@"
      ACExtract = "@acplot@"   
}

System {
      NMOS trans ( gate=g sub=b)
      Vsource_pset vg (g 0) {dc=0}
      Vsource_pset vb (b 0) {dc=0}
}
Solve {
      Poisson
      Coupled { Poisson Electron Hole }

   
      Quasistationary (
                      InitialStep=0.005 MaxStep=0.002 Minstep=1.0e-5
                      Goal { Parameter=vg.dc Voltage=-4 }
                      )
                      { Coupled { Poisson Electron Hole } }
   
      Quasistationary (
                      InitialStep=0.005 MaxStep=0.002 Minstep=1.0e-5
                      Goal { Parameter=vg.dc Voltage=4 }
                      )
                      { ACCoupled (
                             StartFrequency=1e6 EndFrequency=1e6
                             NumberOfPoints=1 Decade
                             Node(g b)  ##For which nodes the AC is performed(16 elements)
                             Exclude(vg vb)  
                                  )
                                  { Poisson Electron Hole }
                                  }
}


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