3.b.batenburg - 20161114 - production tests.pptx
TRANSCRIPT
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Production tests
Dome SeminarDesign for TestabilityNovember 17th 2016
Billo Diallo Batenburg Industriële Elektronica
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Index
Product demands(requirements and scope)
What can be tested(capability)
Test strategy
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Quality - lifecycle Environment used
Demand (proto and product) (Sub)part or (end)product
Know the end product and the end users demands
Product demands
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Product demands
Numbers needed
Support/Maintenance/repair
Complexity
Certification
Know the risks, quantity, special demands and the on fail impact
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§ SPI§ AOI§ Flying probe§ X-ray§ ICT test§ JTAG Boundary scan§ Functional testing
§ SPI § AOI§ Flying probe§ X-r§ ICT test§ JTAG Boundary scan§ Functional testing
What can be tested
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PCB or PCBA inspection system generally based on matching algorithms
What can be tested à Automated Optical Inspection (AOI)
AOI is the “default” system for finding production errors
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What can be tested à Automated Optical Inspection (AOI)
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Non electrical component
Does nothing electrical
Checks solder quality
Perfect error isolation
What can be tested à Automated Optical Inspection (AOI)
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An advanced multimeter that measures between nets
What can be tested à Flying probe
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Fast - Flexible - FixturelessGood error isolation
Non critical component test
10pf
Accurate measurement
What can be tested à Flying probe
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Probe placement space
Accurate measurement
Net access
Bad solder joint that passes Component Shadow
What can be tested à Flying probe
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AC140mVrms (f=5KHz,10KHz)
What can be tested à Flying probe
Noise GroundSensor
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X-ray after flying probe short measurement
What can be tested à Flying probe
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What can be tested à Functional Test
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Test specs should be clear
Needs Fixture/hardware
Error isolation depends on FT
Real function simulation
What can be tested à Functional Test
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§ Test accessibility
§ How to measure or inspect
§ In what order are the test performed
§ Know the overall coverage
Test strategy à Testability Checks
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MPS (Philips)
PCOLA/SOQ(Agilent)
PCOLA/SOQ/FAM(iNEMI)
Material Live LiveCorrectness Correctness
Placement Presence PresenceAlignment AlignmentOrientation Orientation
Solder Shorts ShortsOpens OpensQuality Quality
FeatureAt-speedMeasurement
Test strategy à Classification and identification
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Component Presence Is the component thereCorrectness Correct componentOrientation Rotation 0º/90º/180º/270ºLive Basically electrical okAlignment Small placement or rotation errors
ConnectionShorts Short circuitOpens Open connectionQuality Quality of soldering
FunctionalFeature Function detectionAt-speed At speed (min ~ max)Measurement Full electrical check (BER / CRC)
Test strategy à Classification and identification
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Detected component(Presence)
Correct component (Correctness)
Correct soldering (Shorts, Opens, Quality)
No functions (Live, Feature, At-speed, Measurement)
Test strategy à AOI strength and weakness
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Measures PCB and components (Opens, Shorts)
Real electrical values (Correctness)
Functional (Feature, Measurement)
Soldering (Quality)
S
Test strategy à Flying probe strength and weakness
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Test critical components (Live)
Test critical functions (Feature, Short, Open)
Non critical components (Live, Feature, Open)
Soldering (Quality)
Exact values (Correctness)
Test strategy à Functional test strength and weakness
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Checkable items:
Not Checked:
Checked by AOI:
Com
pone
nt
Con
nect
ion
Func
tiona
l
Test strategy à AOI coverage
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Checked by FT:
Checkable items :
Not Checked :
Checked by AOI:
Checked by FP:
Com
pone
nt
Con
nect
ion
Func
tiona
l
Test strategy à AOI+FPT+FT coverage
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Correct engine, all connected well.
This one is good.
AOI Flying probe Functional test
Right color, right rimsThis one is good.
No strange noises, nice speed.
This one is good.
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All looks fine, what should I fix?
The signal is not good on the pcb
Testing equals product knowledge
Test strategy
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Design is done, lets build and test
Questions??
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Wij maken industriële elektronica mogelijk
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