1、bsi. BS ISO 16525-5:2014 Adhesives -Test methods for isotropic electrically conductive adhesives Part 5: Determination of shear fatigue . making excellence a habit:M BS ISO 16525-5:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 16525-5:2014. The UK part
2、icipation in its preparation was entrusted to Technical Committee PRI/52, Adhesives. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for i
3、ts correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 76957 3 ICS 83.180 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy
4、and Strategy Committee on 31 May 2014. Amendments issued since publication Date Text affected BS ISO 16525-5:2014 ISO INTERNATIONAL STANDARD 16525-5 Adhesives - Test methods for isotropic electrically conductive adhesives-Part 5: Determination of shear fatigue First edition 2014-05-15 Adhesifs- Meth
5、odes dessai pour adhesifs a conductivite e/ectrique isotrope-Partie 5: Determination de Ia fatigue par cisaillement Reference number ISO 16525-5:2014(E) ISO 2014 BS ISO 16525-5:2014 ISO 16525-5:2014(E) COPYRIGHT PROTECTED DOCUMENT ISO 2014 All rights reserved. Unless otherwise specified, no part of
6、this publication may be reproduced o utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in
7、the country of the requeste r. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 0111 Fax+ 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii I SO 2014-All rights reserved Contents BS ISO 16525-5:2014 ISO 16525-5:2014(E) Page Foreword iv 1 Scope
8、 . 1 2 Normative references l 3 Terms and definitions . 1 4 Apparatus and materials 2 5 Specimen . 2 6 Tests . 3 6.1 Atmospheric cond.itions 3 6.2 Procedure 3 6.3 Judgment 4 7 Test report . 4 Annex A (normative) Apparatus for shear fatigue tests . 5 Annex B (normative) Procedure of shear fatigue tes
9、ts . 7 Bibliography . 11 ISO 2014- All rights reserved iii BS ISO 16525-5:2014 ISO 16525-5:2014(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally c
10、arried out through aso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the wor
11、k. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/ IEC Directives, Part 1. In particular the dif
12、ferent approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives Attention is drawn to the possibility that some of the elements of this document may be
13、 the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of t he document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patents Any
14、trade name used in this document is informat ion given for the convenience of users and does not constitute an endorsement. Any trade name used in this document is informat ion given for the convenience of users and does not constitute a n endorsement. For an explanation on the meaning of ISO specif
15、ic terms and expressiotl!s related to conformity assessment, as well as information about !SOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword- Supplementary information The committee responsilble for this document is lSOfTC 61, Plastics, Subc
16、ommittee SC 11, Products. ISO 16525 consists of the following parts, under the general tit le Adhesives- Test methods for isotropic electrically conductive adhesives: iv Part 1: General test methods Part 2: Determination of electric characteristics for use in electronic assemblies Part 3: Determinat
17、ion of heat-transfer properties Part 4: Determination of shear strength and electrical resistance using rigid-to-rigid bonded assemblies Part 5: Determination of shear fatigue Part 6: Determination of pendulum-type shear impact Part 7: Environmental test methods Part 8: Electrochemical-migration tes
18、t methods Part 9: Determination of high-speed signal-transmission characteristics I SO 2014-All rights reserved BS ISO 16525-5:2014 INTERNATIONAL STANDARD ISO 16525-5:2014(E) Adhesives - Test methods for isotropic electrically conductive adhesives -Part 5: Determination of shear fatigue SAFETY STATE
19、MENT - Persons using this part of ISO 16525 should be fa miliar with normal laboratory practice. This partofiSO 16525 does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health pract ices an
20、d to ensure compliance with any regulatory conditions. IMPORTANT- Certain procedures specified in this part of ISO 16525 might involve the use or generation of subst ances, or the generation of waste, that could constitute a local environmental ha zard. Reference should be made to appropriate docume
21、ntation on safe handling and disposal after use. 1 Scope This part of ISO 16525 specifies test methods using miniature specimens to measure shear fatigue of a glued joint that consists of isotropic electrically conductive adhesives and rigid adherends in specified conditions. 2 Normative references
22、The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of t he referenced document (including any amendments) applies. ISO 29
23、1, Plastics- Standard atmospheres for conditioning and testing ISO 431, Copper refinery shapes ISO 472, Plastics - Vocabulary ISO 10365, Adhesives - Designation of main failure patterns ISO 17212, Structural adhesives - Guidelines for the surface preparation of metals and plastics prior to adhesive
24、bonding 3 Terms and definitions For the purposes of this document, the terms and definitions in ISO 472 and the following apply. 3.1 shear fatigue life number of cycles of shear strain applied to the test specimen until adhesion layer failure is observed 3.2 maximum load force generated through shea
25、r deformation of the specimen at the maxi mum test positions in each cycle ISO 2014- All rights reserved 1 BS ISO 16525-5:2014 ISO 16525-5:2014(E) 3.3 minimum load force generated through shear deformation of the specimen at the minimum test positions in each cycle 3.4 displacement range distance be
26、tween the actuators maximum and minimum positions 3.5 shear strain shear strain is determined, dividing shear displacement by thickness of the adhesive layer Note 1 to ,entry: Displacement measured by the test apparatus is not consistent with shear displacement of the adhesive layer, containing defo
27、rmation of both the adherend and the test apparatus. Therefore, determine the rigidity of both the adhereitld and the test apparatus in advance, and. take deformation of both the ad he rend and the test apparatus into account when calculating test results. 3.6 shear strain range algebraic sum of max
28、imum shear strain and minimum shear strain generated in the isotropic electrically conductive adhesive layer 3.7 non-linear shear strain range algebraic sum of the maximum non-linear shear strain and minimum non-linear shear strain generated in the isotropic electrically conductive adhesive layer, e
29、quivalent to the maximum width at zero stress of the cyclic shear stress-shear strain curve in a cycle 3.8 displacement rate crosshead speed of the test machine, i.e. a jig, that applies the load to the isotropic electrically conductive adhesive layer during the shear strength test 4 Apparatus and m
30、aterials 4.1 Apparatus for shear strength tests, consisting of a tensile machine, a specimen-holder jig, an ohmmeter, and a recorder. The specifications shall comply with the specifications of test apparatus specified in Annex A. 4.2 Ohmmete r, to measure electrical resistance of specimens, based on
31、 the fall-of-potential method (four-terminal operation) or equivalent. 4.3 Shearing jig, for shear strength testing of specimens, as specified in Annex A unless otherwise specified in the product specifications. 4.4 Stereoscopic microscope, with magnification from SOx to 250x or so and with a light
32、that illuminates the specimen at luminance around 2 000 lx. 4.5 Adherend, class-2 oxygen-free copper as specified in ISO 431, unless otherwise specified in the product specifications. 5 Specimen Use a specimen that is consistent with the adherend in form and dimensions, as shown in Figure 1. NOTE If
33、 the dimensions of the specimeitl are different from those shown in Figure 1, interpretation of results might be difficult because adhesion strength cannot be directly compared. 2 ISO 2014- All rights reserved BS ISO 16525-5:2014 ISO 16525-5:2014(E) Bonding of the adherend using an isotropic electri
34、cally conductive adhesive shall be undertaken as follows. a) Treat the surface to be bonded in accordance with manufacturers instructions or ISO 17212. Report the method of surface treatment. b) Join a lead wire to the end face of the ad herend to measure electrical resistance. c) Apply the isotropi
35、c electrically conductive adhesive to the adherend. Fix and bond them so that the thickness of the joint is equal to the dimension shown in Figure 1. For application and the curing of the adhesives, follow the adhesive manufacturers recommendations. d) Use a jig to maintain the gap and alignment bet
36、ween the copper rods when bonding. Dimensions in millimetres I I-+:)-=-:+-1 2 1.- -J Key 1 copper rod 2 copper wire 3 conductive adhesive Figure 1 - Miniature joint s pecime n 6 Tests 6.1 Atmospheric conditions Where possible, use the test atmospheric conditions specified in ISO 291. If alternat ive
37、 atmospher ic conditions are used upon mutual agreement between the delivering and receiving parties, record the temperature and humidity used in the test report . 6.2 Procedure After the pretreatment, observe the adhesive layer, using a stereoscopic microscope specified in ti to check that there ar
38、e no cracks or defects. Then, follow tlhe procedure below unless otherwise specified. ISO 2014- All rights reserved 3 BS ISO 16525-5:2014 ISO 16525-5:2014(E) Details of the test procedure for measuring the shear strength of an assembly bonded with an isotropic electrically conductive adhesive are gi
39、ven in Annex B. a) Fix the specimen to t he fixing jig and connect it to the ohmmeter. b) Set a rate of loading (or displacement rate) and test temperature. c) Continue the fatigue test until a fracture is detected and record changes in the maximum shear force, electrical resistance, and shear fatig
40、ue life. d) Observe the fracture, if necessary, to confirm and record the fracture mode. 6.3 Judgment The specimen is judged to have reached its fatigue life when the maximum shear load has decreased to a specific value, for example, 20 % from t he initial value, or the electrical resistance has inc
41、reased to a specific value, for example, 20 % from the initial value. Note that the shear force is influenced by changes in the resin characteristics due to heating. Therefore, when increasing temperature to or higher than the glass transition point during a test, it is preferable to use electrical
42、resistance to judge the specimens fatigue life. 7 Test report The test report shall contain the following items. Some items may be selected from items b) tom) upon agreement between the delivering and receiving parties: a) a reference to this part of ISO 16525, i.e. ISO 16525-5; b) the name of the i
43、sotropic electrically conductive adhesive and its data, including kinds of resin, filler material. manufacturers code and lot number; c) requirements of the adherend, including material and surface treatment; d) application method of the isotropic electrically conductive adhesive, curing time or set
44、ting time, temperature, and pressure of the adhesive procedure; e) dimensions of the specimens and the form and dimensions of the adhesive layer after bonding; f) model numbers of the shear fatigue test apparatus and ohmmeter; g) details of fixation of specimens (illustration preferred); h) any adju
45、stment of the pretest conditions and test atmospheric conditions; i) the displacement rate and test temperature; j) the displacement range or shear str ain range; k) the number of cycles to failure and electrical resistance; I) modes of fracture after the test in accordance with ISO 10365; m) the da
46、te, institution and atmospheric conditions of t he test . 4 I SO 2014-All rights reserved A.l General AnnexA (normative) Apparatus for shear fatigue tests BS ISO 16525-5:2014 ISO 16525-5:2014(E) This annex specifies the apparatus for shear fatigue testing of specimens specified in Clause 4. and spec
47、ifies its detailed requirements. A.2 Apparatus for shear fatigue tests A.2.1 Apparatus for fatigue tests For fatigue tests, use apparatus meeting the following requirements unless otherwise specified in the product specifications: a) having a function of moving the specimen-fixing jig, using ramp wa
48、ves; The test apparatus should preferably be equipped with a linear DC motor or piezoelectric actuator, so that displacement can be controlled within the micrometer range. The test apparatus should preferably be able to control sine and trapezoidal waves, in addition to ramp waves, because tests usi
49、ng sine or trapezoidal waves instead of ramp waves are also effective. b) having functions of measuring displacement in the vicinity of the specimen using a displacement detector installed to the specimen fixing jig. Do not use the displacement detector in the actuator and feedback control of the actuator using the measured displacement. The displacement detector should preferably be a noncontact eddy current type and a capacitance type to avoijd
