Agilent Technologies EasyEXPERT, Manual, Page: 436 / 610

15 Structure
15.15 Junction DcParam: Junction device DC parameters (Is,N,Rs) (A.01.20)
[Supported Analyzer]
B1500A, 4155B, 4155C, 4156B, 4156C
[Description]
Measures the forward bias anode voltage vs anode current characteristics, and extracts the slope minimum
value (N_Min), the reverse direction saturation current minimum value (IsMin, IsMin2), and the series
resistance (Rs).
[Device Under Test]
Junction device, diode
[Device Parameters]
L: Junction length
W: Junction width
Temp: Temperature
Imax: Current compliance
[Test Parameters]
IntegTime: Integration time
Anode: SMU connected to Anode terminal, primary sweep voltage output
VanodeStart: Sweep start voltage for Anode terminal
VanodeStop: Sweep stop voltage for Anode terminal
VanodeStep: Sweep step voltage for Anode terminal
Cathode: SMU connected to Cathode terminal, constant voltage output
[Extended Test Parameters]
Vcathode: Cathode voltage
HoldTime: Hold time
DelayTime: Delay time
AnodeMinRng: Minimum range for the anode current measurement
[Measurement Parameters]
Anode current Ianode
Cathode current Icathode
[User Function]
IanodePerArea=Ianode/L/W
IcathodePerArea=Icathode/L/W
Vt=k*(Temp+273.15)/q
N=1/Vt/(diff(log(Ianode),Vanode))
N_Min=min(N)
Slope=diff(lgt(Ianode),Vanode)
Is=lgt(Ianode)-Slope*Vanode
IsMin=min(Is)
SmplNum=abs((VanodeStop-VanodeStart)/Vano1
I_Rs=at(Ianode,SmplNum,1)
deltaV_Rs=VanodeStop-N_Min*Vt*log(I_Rs/IsMin)
Rs=deltaV_Rs/I_Rs
[Analysis Function]
IsMin2=@L1Y (Y intercept of Line1)
Agilent EasyEXPERT Application Library Reference, Edition 8
15-28