Skip to content

Commit

Permalink
FT GRADING: CHANGE BUMP BONDING CUT and remove redundancies in bb cut…
Browse files Browse the repository at this point in the history 
… threshold calculation
  • Loading branch information
@piberger
piberger committed Mar 17, 2016
1 parent 9ca33b7 commit 753e6d2
Show file tree
Hide file tree
Showing 2 changed files with 25 additions and 26 deletions.
37 changes: 22 additions & 15 deletions ...tResultClasses/CMSPixel/QualificationGroup/Fulltest/Chips/Chip/BumpBonding/BumpBonding.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -19,8 +19,8 @@ def CustomInit(self):
self.ResultData['KeyValueDictPairs']['nBumpBondingProblems'] = {'Value': round(-1, 0),
'Label': 'N BumpProblems'}

self.ResultData['KeyValueDictPairs']['nBumpBondingProblems2'] = {'Value': round(-1, 0),
'Label': 'N (experimental cut)',
self.ResultData['KeyValueDictPairs']['nBumpBondingProblemsOld'] = {'Value': round(-1, 0),
'Label': 'N (old cut)',
'Style': 'color:#666;'}

def PopulateResultData(self):
Expand All @@ -30,6 +30,7 @@ def PopulateResultData(self):
mean = -9999
rms = -9999
nBumpBondingProblems = 0
nBumpBondingProblemsOld = 0
nSigma = self.TestResultEnvironmentObject.GradingParameters['BumpBondingProblemsNSigma']
minDistanceFromPeak = self.TestResultEnvironmentObject.GradingParameters['BumpBondingProblemsMinDistanceFromPeak']

Expand Down Expand Up @@ -61,13 +62,13 @@ def PopulateResultData(self):
self.ResultData['Plot']['ROOTObject'].GetYaxis().CenterTitle()
self.ResultData['Plot']['ROOTObject'].Draw()

# cut 1
# old bump bonding cut based on mean and RMS of whole distribution
mean = self.ResultData['Plot']['ROOTObject'].GetMean()
rms = self.ResultData['Plot']['ROOTObject'].GetRMS()
thr = mean + nSigma * rms
startbin = self.ResultData['Plot']['ROOTObject'].FindBin(thr)
for bin in range(startbin, self.ResultData['Plot']['ROOTObject'].GetNbinsX()):
nBumpBondingProblems += self.ResultData['Plot']['ROOTObject'].GetBinContent(bin)
nBumpBondingProblemsOld += self.ResultData['Plot']['ROOTObject'].GetBinContent(bin)
self.Cut = ROOT.TCutG('bumpBondingThreshold', 2)
self.Cut.SetPoint(0, thr, -1e9)
self.Cut.SetPoint(1, thr, +1e9)
Expand All @@ -76,14 +77,16 @@ def PopulateResultData(self):
self.Cut.SetLineColor(ROOT.kRed)
self.Cut.Draw('PL')

# cut 2 (experimental)
# new bump bonding cut

# use coarse histogram to detect peak
CoarseHistogram = self.ResultData['Plot']['ROOTObject'].Clone(self.GetUniqueID())
RebinX = 4
CoarseHistogram.Rebin(RebinX)
CoarseHistogram.GetXaxis().SetRangeUser(20, 250)
PeakPositionGuess = CoarseHistogram.GetXaxis().GetBinLowEdge(CoarseHistogram.GetMaximumBin())

# 1st iteration
# fit right half of peak with a Gaussian
GaussFitFunction = ROOT.TF1("BBPeakFitFunction","gaus(0)", max(0, PeakPositionGuess), min(PeakPositionGuess+40, 255))
GaussFitFunction.SetParameter(0, CoarseHistogram.GetBinContent(CoarseHistogram.GetMaximumBin()) / RebinX)
GaussFitFunction.SetParameter(1, PeakPositionGuess)
Expand All @@ -94,17 +97,21 @@ def PopulateResultData(self):

thr2 = GaussFitFunction.GetParameter(1) + nSigma * GaussFitFunction.GetParameter(2)

# ensure threshold is at least minDistanceFromPeak units away from point where fit == 1/2
try:
thrLowLimit = minDistanceFromPeak + GaussFitFunction.GetParameter(1) + math.sqrt(2)*GaussFitFunction.GetParameter(2) * math.sqrt(math.log(2) - math.log(1.0/GaussFitFunction.GetParameter(0)))
if thr2 < thrLowLimit:
thr2 = thrLowLimit
except:
pass

startbin = self.ResultData['Plot']['ROOTObject'].FindBin(thr2)
nBumpBondingProblems2 = 0
for bin in range(startbin, self.ResultData['Plot']['ROOTObject'].GetNbinsX()):
nBumpBondingProblems2 += self.ResultData['Plot']['ROOTObject'].GetBinContent(bin)
# align threshold to bin boundaries
startbin = self.ResultData['Plot']['ROOTObject'].FindBin(thr2)+1
thr2 = self.ResultData['Plot']['ROOTObject'].GetXaxis().GetBinLowEdge(startbin)

# count missing bumps
for bin in range(startbin, self.ResultData['Plot']['ROOTObject'].GetNbinsX()+1):
nBumpBondingProblems += self.ResultData['Plot']['ROOTObject'].GetBinContent(bin)

self.Cut2 = ROOT.TCutG('bumpBondingThreshold2', 2)
self.Cut2.SetPoint(0, thr2, -1e9)
Expand All @@ -117,19 +124,19 @@ def PopulateResultData(self):

self.Title = 'Bump Bonding: C{ChipNo}'.format(ChipNo=self.ParentObject.Attributes['ChipNo'])
self.SaveCanvas()
self.ResultData['KeyValueDictPairs']['Mean']['Value'] = round(mean, 2)
self.ResultData['KeyValueDictPairs']['Mean']['Value'] = round(GaussFitFunction.GetParameter(1), 2)
self.ResultData['KeyList'].append('Mean')
self.ResultData['KeyValueDictPairs']['RMS']['Value'] = round(rms, 2)
self.ResultData['KeyValueDictPairs']['RMS']['Value'] = round(GaussFitFunction.GetParameter(2), 2)
self.ResultData['KeyList'].append('RMS')
self.ResultData['KeyValueDictPairs']['Threshold']['Value'] = round(thr, 2)
self.ResultData['KeyValueDictPairs']['Threshold']['Value'] = round(thr2, 2)
self.ResultData['KeyList'].append('Threshold')

if self.Attributes['isDigitalROC']:
self.ResultData['KeyValueDictPairs']['nSigma']['Value'] = nSigma
self.ResultData['KeyValueDictPairs']['nBumpBondingProblems']['Value'] = round(nBumpBondingProblems, 0)
self.ResultData['KeyValueDictPairs']['nBumpBondingProblems2']['Value'] = "{N:1.0f}".format(N=nBumpBondingProblems2)
self.ResultData['KeyValueDictPairs']['nBumpBondingProblemsOld']['Value'] = "{N:1.0f}".format(N=nBumpBondingProblemsOld)
self.ResultData['KeyList'].append('nSigma')
self.ResultData['KeyList'].append('nBumpBondingProblems')
self.ResultData['KeyList'].append('nBumpBondingProblems2')
self.ResultData['KeyList'].append('nBumpBondingProblemsOld')


14 changes: 3 additions & 11 deletions ...MSPixel/QualificationGroup/Fulltest/Chips/Chip/BumpBondingProblems/BumpBondingProblems.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -85,17 +85,9 @@ def PopulateResultData(self):


def CheckBumpBondingProblems(self):
BumpBondingProblems_Mean = \
self.ParentObject.ResultData['SubTestResults']['BumpBonding'].ResultData['KeyValueDictPairs']['Mean']['Value']
BumpBondingProblems_RMS = \
self.ParentObject.ResultData['SubTestResults']['BumpBonding'].ResultData['KeyValueDictPairs']['RMS']['Value']
BumpBondingProblems_nSigma = 0
if self.ParentObject.ResultData['SubTestResults']['BumpBonding'].ResultData['KeyValueDictPairs'].has_key(
'nSigma'):
BumpBondingProblems_nSigma = \
self.ParentObject.ResultData['SubTestResults']['BumpBonding'].ResultData['KeyValueDictPairs']['nSigma'][
'Value']
threshold = BumpBondingProblems_Mean + BumpBondingProblems_nSigma * BumpBondingProblems_RMS

# use threshold already calculated in BumpBonding subtest
threshold = self.ParentObject.ResultData['SubTestResults']['BumpBonding'].ResultData['KeyValueDictPairs']['Threshold']['Value']
for column in range(self.nCols):
for row in range(self.nRows):
self.HasBumpBondingProblems(column, row, threshold)
Expand Down

0 comments on commit 753e6d2

Please sign in to comment.