1.0ScopeThismethoddefinestheprocedurefordeter-
miningtheroughnessorprofileofmetallicfoils.
Boththesmoothandtreatedsidesoffoilscanbeevaluated
usingthesametechniquebutdifferentroughnessparameters.
1.1ThesmoothsideoffoilsshallbeevaluatedusingR
a
.
R
a
isdefinedasthearithmeticaveragevalueofallabsolute
distancesoftheroughnessprofilefromthecenterlinewithin
themeasuringlength.
1.2Thetreatedsideoffoilsshallbeevaluatedusingthe
parameterR
z
(DIN)orR
TM
whichisdefinedastheaverage
maximumpeaktovalleyheightoffiveconsecutivesampling
lengthswithinthemeasurementlength.Thisvalueisapproxi-
matelyequivalenttothevaluesofprofiledeterminedfrom
microsectioningtechniques.
1.3R
Z
(ISO)isadifferentparameterfromR
z
(DIN)andisnot
applicabletothismethod.
2.0ApplicableDocuments
DIN4768
ISO4287
3.0TestSpecimensCutaspecimen101x101mm[4x4
inches]minimumfromtherepresentativesample.Thelocation
andnumberofspecimensshallbedefinedinthematerial
specification.
4.0Apparatus/Materials
4.1Knifeorothersuitabledevice.
4.2Profilimeterorsurfaceroughnessmeterwithamotorized
driveandthefollowingparameters:
Parameter
CutOff
MeasuringLength
TracingLength
DiamondStylusRadiusValue
0.8mm
4.0mm
<5mm
0.005mm
RoughnessParameter
SmoothSide
TreatedSide
R
a
R
ZDIN
orR
TM
Note:SeeFootnoteNo.1forequipmentfoundsuitablefor
determinationofbothR
a
andR
ZDIN
(orR
TM
).
1
4.3RoughnessStandard
SmoothSide:R
a
with5%orbettercertifiedtolerance.
TreatedSide:R
ZDIN
(orR
TM
)with5%orbettercertifiedtoler-
ance.
4.4Plateglassorothersmoothflatsurface.
4.5Compressedair.
4.6Gloves,lintfree.
4.7Tapeorweight.
5.0Procedure
5.1Checktheprofilometercalibrationusingtheappropriate
roughnessstandardforthevalueR
a
orR
ZDIN
(R
TM
)andmag-
nitudetobemeasured.Insurethestylusmovesperpendicular
tothegroovesandthesurface.
Note:ForR
Z
measurements,knownstandardsareavailable
in1,3,and10micrometernominalvalues.SeeFootnote2.
2
5.1.1Comparethevaluesobtainedonsixdifferentmea-
surementstakenatdifferentlocationswithinthestandardto
thecertified(notnominalvalue)ofthestandard.Iftheaverage
resultisnotwithin2%ofthestandardvalue,adjusttheinstru-
mentandrepeat5.1untilthistoleranceisachieved.
1.ProfilometerswhichhavebeenusedtomeasurebothR
a
andR
z
orR
TM
are:Surtronic3byTaylorHobson(R
a
andR
TM
)(see8.2);M4PbyPerthen(see8.1)
(R
a
andR
ZDIN
).
2.StandardsforR
ZDIN
areavailablefrom:see8.1,PGN-33micrometernominal,PGN-1010micrometernominal.
TheInstituteforInterconnectingandPackagingElectronicCircuits
2215SandersRoad?Northbrook,IL60062
IPC-TM-650
TESTMETHODSMANUAL
Number
2.2.17
Subject
SurfaceRoughnessandProfileofMetallicFoils
(ContactingStylusTechnique)
Date
3/90
Revision
OriginatingTaskGroup
N/A
MaterialinthisTestMethodsManualwasvoluntarilyestablishedbyTechnicalCommitteesoftheIPC.Thismaterialisadvisoryonly
anditsuseoradaptationisentirelyvoluntary.IPCdisclaimsallliabilityofanykindastotheuse,application,oradaptationofthis
material.Usersarealsowhollyresponsibleforprotectingthemselvesagainstallclaimsorliabilitiesforpatentinfringement.
EquipmentreferencedisfortheconvenienceoftheuseranddoesnotimplyendorsementbytheIPC.
Page1of2
5.2Placethefoiltestspecimenontheplateglasssurface
withthesidetobetestedawayfromtheglass.Securethe
specimenwithtapeoraweightatbothendstopreventmove-
mentorbucklingduringthemeasurement.
5.3Ifnecessary,andforrefereetests,blowthesurfaceto
betestedwithcleancompressed(orcanned)airtoremove
loosedebris.
5.4Placetheprofilometerdrivemechanismsuchthatthe
probetravelsacrossthefoilinthetransversedirection.
5.5Setthemeasurementparametersrequiredin4.2.
5.6Initiatethedrivemechanismtomakeasingledetermina-
tionofthedesiredparameter.
5.7Movethedrivemechanismandmaketwoadditional
measurementsintwootherareasofthespecimen.
6.0Calculation
6.1Calculatetheaveragevalueforthethreedeterminations
onthespecimen.
6.2Usetheaveragevalueofoneormorespecimensto
conformtothevaluespecifiedinthematerialspecification.
7.0Report
7.1Reportthevaluerequiredbythespecificationtothe
nearest0.1microinchor0.01micrometerforR
a
andtothe
nearest0.01milsor0.1micrometerforR
2
.
8.0ApparatusSources
8.1PerthometerM4P:STDSPGN-3andPGN-10
AtlantechSalesInc.
8825RoswellRd.,Suite591
Atlanta,GA30350
(404)992-3329
8.2Surtronlc3;RankTaylorHobsonLTD
POBOX36
GathlaxtonSt.
LeicesterLE2OSLEngland0533-23801
IPC-TM-650
Number
2.2.17
Subject
SurfaceRoughnessandProfileofMetallicFoils(Contacting
StylusTechnique)
Date
3/90
Revision
Page2of2
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