1.0ScopeThismethodoftestcoverstheprocedurefor
determiningweight(averagethickness-byweightmeasure-
ment)ofcopperfoilforprintedcircuits.
2.0ApplicableDocumentsNone.
3.0TestSpecimenUsetemplatedescribedbelowtocut
threesamplesofcopper.Samplesshouldbetakenfromnear
theleftandrightedgesandthecenteracrossthewidthofthe
roll.
4.0Apparatus
4.1Balancecapableofweighingaccuratelyto±0.1grams.
4.2Knifesuitableforcuttingcopper.
4.3Templateprecutto254sq.in.(0.164sq.meters)[12in
±1/32inby21-3/16in±1/32in](304.8mmby538.2
+0.079mm).
5.0Procedure
5.1Identifythesamples(left,centerandright);weighsec-
tionssinglyandrecordvalues.
5.2Evaluation
(1)Oneouncecopperfoil(nominal0.0014in.)shouldweigh
50grams±5.
(2)Twoouncecopperfoil(nominal0.0028in.)shouldweigh
100grams±10.
(3)‘‘X’’ouncecopperfoilshouldweigh50Xgrams±10%.
TheInstituteforInterconnectingandPackagingElectronicCircuits
2215SandersRoad?Northbrook,IL60062
IPC-TM-650
TESTMETHODSMANUAL
Number
2.2.12
Subject
ThicknessofCopperByWeight
Date
3/76
Revision
A
OriginatingTaskGroup
N/A
MaterialinthisTestMethodsManualwasvoluntarilyestablishedbyTechnicalCommitteesoftheIPC.Thismaterialisadvisoryonly
anditsuseoradaptationisentirelyvoluntary.IPCdisclaimsallliabilityofanykindastotheuse,application,oradaptationofthis
material.Usersarealsowhollyresponsibleforprotectingthemselvesagainstallclaimsorliabilitiesforpatentinfringement.
EquipmentreferencedisfortheconvenienceoftheuseranddoesnotimplyendorsementbytheIPC.
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