IEC_TR_63017-2015.pdf

IEC TR 63017 Edition 1.0 2015-12 TECHNICA L R EPOR T Flexible printed circuit boards(FPCBs)Met hod of compensation of impedance v ariat ions IEC TR 63017:2015-12(en)colourinsideInternational Electrotechnical Commission International Electrotechnical Commission IEC TR 63017 Edit ion 1.0 2015-12 TECHNICA L R EPOR T Flexible print ed circuit boards(FPCBs)Met hod of compensat ion of impedance v ariat ions INTERNATIONA L ELECTROTECHNICA L COMMISSION ICS 31.180 ISBN 978-2-8322-3083-1 R egist er ed tr ademar k of t he Int er national Electr ot echnical Commission W arning!Make sure that y ou obtained this publication from an authorized distributor.colourinsideInternational Electrotechnical Commission 2 IEC TR 63017:2015 IEC 2015 CONTENTS FOREWORD.3 1 Scope.5 2 Normative references.5 3 Apparatus.5 3.1 Time domain reflectometry.5 3.2 Block diagram for impedance measuring.5 4 Test specimen.6 4.1 General.6 4.2 Structure.6 4.3 Test method.7 4.4 Calculation.8 5 Report.9 Annex A(normative)Block diagram for impedance measuring with TDR.10 Annex B(informative)Theoretical background.11 Annex C(informative)Example of an impedance measurement with TDR.12 Annex D(informative)Hand contact effect.13 Annex E(informative)Test result.14 E.1 Shield 1 FPCB.14 E.2 Shield 2 FPCB.15 Bibliography.16 Figure 1 TDR test system.5 Figure 2 Two types of impedance structure of FPCB.6 Figure 3 Schematic diagram of a test specimen.7 Figure 4 Impedance value of two type FPCB(bare and shield).8 Figure 5 Compensation value(L)of the Cu line width for the shield FPCB.9 Figure A.1 TDR test system according to IPC 2141a-9-1.10 Figure A.2 TDR test system according to Agilent TDR 54754A.10 Figure B.1 Two types of impedance structure of FPCBs.11 Figure B.2 Comparison of the impedance value of a bare FPCB versus a shield FPCB.11 Figure C.1 Photographic view of the impedance measurement with TDR.12 Figure D.1 Effect of impedance variation by hand contact for bare FPCB.13 Figure E.1 Measurement result of the test specimen for shield 1 FPCB.14 Figure E.2 Measurement result of the test specimen for shield 2 FPCB.15 Table E.1 Cross-section of test specimen with using shield 1 FPCB.14 Table E.2 Cross-section of test specimen with using shield 2 FPCB.15 International Electrotechnical Commission IEC TR 63017:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FLEXIBLE PRINTED CIRCUIT BOARDS(FPCBs)METHOD OF COMPENSATION OF IMPEDANCE VARIATIONS FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all national electrotechnical committees(IEC National Committees).The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields.To this end and in addition to other activities,IEC publishes International Standards,Technical Specifications,Technical Reports,Publicly Available Specifications(PAS)and Guides(hereafter referred to as“IEC Publication(s)”).Their preparation is entrusted to technical committees;any IEC National Committee interested in the subject dealt with may participate in this preparatory work.International,governmental and non-governmental organizations liaising with the IEC also participate in this preparation.IEC collaborates closely with the International Organization for Standardization(ISO)in accordance with conditions determined by agreement between the two organizations.2)The formal decisions or agreements of IEC on technical matters express,as nearly as possible,an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.3)IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense.While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate,IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.4)In order to promote international uniformity,IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications.Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.5)IEC itself does not provide any attestation of conformity.Independent certification bodies provide conformity assessment services and,in some areas,access to IEC marks of conformity.IEC is not responsible for any services carried out by independent certification bodies.6)All users should ensure that they have the latest edition of this publication.7)No liability shall attach to IEC or its directors,employees,servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury,property damage or other damage of any nature whatsoever,whether dire