EN IEC 60068-2-82:2019
(Main)Environmental testing - Part 2-82: Tests - Test Xw1: Whisker test methods for components and parts used in electronic assemblies
Environmental testing - Part 2-82: Tests - Test Xw1: Whisker test methods for components and parts used in electronic assemblies
IEC 60068-2-82:2019 specifies tests for the whiskering propensity of surface finishes of electric or electronic components and mechanical parts such as punched/stamped parts (for example, jumpers, electrostatic discharge protection shields, mechanical fixations, press‑fit pins and other mechanical parts used in electronic assemblies) representing the finished stage, with tin or tin-alloy finish. Changes of the physical dimensions of mould compounds, plastics and the like during the required test flow are not considered or assessed. The test methods have been developed by using a knowledge-based approach. This edition includes the following significant technical changes with respect to the previous edition: – extension of the scope of the test standard from electronic to electromechanic components and press-fit pins, which are used for assembly and interconnect technology; – significant reduction of the testing effort by a knowledge-based selection of test conditions i.e. tests not relevant for a given materials system can be omitted (see Annex D); – harmonization with JESD 201A by omission of severities M, N for temperature cycling tests; – highly reduced test duration (1 000 h instead of 4 000 h) for damp-heat test by introducing test condition at elevated humidity of 85 % R.H. and a temperature of 85 °C providing increased severity.
Umgebungseinflüsse - Teil 2-82: Prüfungen - Prüfung Xw1: Whisker-Prüfverfahren für Bauelemente und Teile in elektronischen Baugruppen
Essais d’environnement - Partie 2-82: Essais - Essai Xw1: Méthodes de vérification des trichites pour les composants et les pièces utilisés dans les ensembles électroniques
L'IEC 60068-2-82:2019 spécifie des essais de vérification de la propension au développement des trichites pour les finis de surface des composants électriques ou électroniques et des pièces mécaniques comme les pièces embouties/estampées (par exemple cavaliers, écrans de protection contre les décharges électrostatiques, fixations mécaniques, contacts insérés à force et autres pièces mécaniques utilisées dans les ensembles électroniques) qui représentent la phase de finition, avec un fini en étain ou en alliage d'étain. Les modifications des dimensions physiques des composants moulés, des plastiques et autres pendant le flux d'essai exigé ne sont pas prises en compte ni évaluées. Les méthodes d'essai ont été mises au point en utilisant une approche fondée sur la connaissance. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: – extension du domaine d'application de la norme d'essai des composants électroniques aux composants électromécaniques et aux contacts insérés à force qui sont utilisés pour la technologie d'assemblage et d'interconnexion; – réduction significative de l'effort d'essai par une sélection de conditions d'essai fondée sur la connaissance, c'est-à-dire que les essais non applicables à un système de matériaux donné peuvent être omis (voir Annexe D); – harmonisation avec la JESD 201A par omission des sévérités M et N pour les essais de cycle thermique; – réduction considérable de la durée d'essai (1 000 h au lieu de 4 000 h) pour l'essai de chaleur humide par l'introduction d'une condition d'essai à humidité élevée de 85 % H.R. et d'une température de 85 °C assurant une plus grande sévérité.
Okoljsko preskušanje - 2-82. del: Preskusi - Preskus Xw1: Preskusna metoda za nitke v komponentah pri elektronskih sestavih
Ta del standarda IEC 60068 določa preskuse nagnjenosti k tvorjenju vlaknastih kristalov, ki se lahko pojavijo na prevlekah električnih ali elektronskih komponent in mehanskih delov, kot so vgravirani/vtisnjeni deli (na primer povezovalni vodi, zaščite pred elektrostatičnimi razelektritvami, mehanske pritrditve, zatič za pritrditev s pritiskom ter drugi mehanski deli, ki se uporabljajo v elektronskih sklopih) in predstavljajo zaključno fazo, s prevleko iz kositra ali kositrove zlitine. Spremembe fizičnih mer kalupnih mas, polimerov in podobnega med zahtevanim preskušanjem niso obravnavane ali ocenjene. Preskusne metode so bile razvite z na znanju temelječim pristopom.
Ta dokument lahko uporabljajo tudi poddobavitelji, na primer delavnice za prevleke, delavnice za vtiskavanje ali drugi ponudniki storitev za zagotavljanje enakomerne kakovosti površine v oskrbovalni verigi.
Te preskusne metode se uporabljajo z opredeljenimi kriteriji sprejemljivosti, če jih predpisuje ustrezna specifikacija komponente ali uporabe.
Preskusi, ki so opisani v tem dokumentu, se uporabljajo za temeljno kvalifikacijo, redno spremljanje skladno s točko 7 in za spremembe v tehnologiji ali proizvodnih postopkih obstoječih površin skladno s točko 9.
Ta preskusna metoda ne zajema priključnega dela konektorjev. Za priključne dele konektorjev se uporablja IEC 60512-16-21.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2019
Nadomešča:
SIST EN 60068-2-82:2007
Okoljsko preskušanje - 2-82. del: Preskusi - Preskus Xw1: Preskusna metoda za
nitke v komponentah pri elektronskih sestavih
Environmental testing - Part 2-82: Tests - Test Xw1: Whisker test methods for
components and parts used in electronic assemblies
Umgebungseinflüsse - Teil 2-82: Prüfungen - Prüfung XW1: Whisker-Prüfverfahren für
elektronische und elektrische Bauelemente
Essais d’environnement - Partie 2-82: Essais - Essai XW1: Méthodes de vérification des
trichites pour les composants électroniques et électriques
Ta slovenski standard je istoveten z: EN IEC 60068-2-82:2019
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
31.190 Sestavljeni elektronski Electronic component
elementi assemblies
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60068-2-82
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2019
ICS 19.040 Supersedes EN 60068-2-82:2007
English Version
Environmental testing - Part 2-82: Tests - Test Xw1: Whisker test
methods for components and parts used in electronic
assemblies
(IEC 60068-2-82:2019)
Essais d'environnement - Partie 2-82: Essais - Essai Xw1: Umgebungseinflüsse - Teil 2-82: Prüfungen - Prüfung XW1:
Méthodes de vérification des trichites pour les composants Whisker-Prüfverfahren für Bauelemente und Teile in
et les pièces utilisés dans les ensembles électroniques elektronischen Baugruppen
(IEC 60068-2-82:2019) (IEC 60068-2-82:2019)
This European Standard was approved by CENELEC on 2019-06-18. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60068-2-82:2019 E
European foreword
The text of document 91/1562/FDIS, future edition 2 of IEC 60068-2-82, prepared by IEC/TC 91 "Electronics
assembly technology" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national level by (dop) 2020-03-18
publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-06-18
document have to be withdrawn
This document supersedes EN 60068-2-82:2007.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60068-2-82:2019 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61191-1 NOTE Harmonized as EN IEC 61191-1
IEC 61249-2-7 NOTE Harmonized as EN 61249-2-7
IEC 61249-2-22 NOTE Harmonized as EN 61249-2-22
IEC 61249-2-35 NOTE Harmonized as EN 61249-2-35
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references, the
latest edition of the referenced document (including any amendments) applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60068-1 2013 Environmental testing - Part 1: General and EN 60068-1 2014
guidance
IEC 60068-2-14 2009 Environmental testing - Part 2-14: Tests - Test EN 60068-2-14 2009
N: Change of temperature
IEC 60068-2-20 - Environmental testing - Part 2-20: Tests - Test EN 60068-2-20 -
T: Test methods for solderability and
resistance to soldering heat of devices with
leads
IEC 60068-2-58 - Environmental testing - Part 2-58: Tests - Test EN 60068-2-58 -
Td: Test methods for solderability, resistance
to dissolution of metallization and to soldering
heat of surface mounting devices (SMD)
IEC 60068-2-67 - Environmental testing - Part 2-67: Tests - Test EN 60068-2-67 -
Cy: Damp heat, steady state, accelerated test
primarily intended for components
IEC 60068-2-78 - Environmental testing - Part 2-78: Tests - Test EN 60068-2-78 -
Cab: Damp heat, steady state
IEC 60512-16-21 2012 Connectors for electronic equipment - Tests EN 60512-16-21 2012
and measurements - Part 16-21: Mechanical
tests on contacts and terminations - Test 16u:
Whisker test via the application of external
mechanical stresses
IEC 61192-3 2002 Workmanship requirements for soldered EN 61192-3 2003
electronic assemblies - Part 3: Through-hole
mount assemblies
IEC 60068-2-82 ®
Edition 2.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Environmental testing –
Part 2-82: Tests – Test Xw : Whisker test methods for components and parts
used in electronic assemblies
Essais d'environnement –
Partie 2-82: Essais – Essai Xw : Méthodes de vérification des trichites
pour les composants et les pièces utilisés dans les ensembles électroniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-6863-6
– 2 – IEC 60068-2-82:2019 © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Test equipment . 9
4.1 General . 9
4.2 Desiccator . 9
4.3 Humidity chamber . 9
4.4 Thermal cycling chamber . 9
4.5 Equipment for visual inspection . 9
4.5.1 Scanning electron microscope . 9
4.5.2 Optical microscope/Confocal laser microscope . 9
4.6 Fixing jig . 9
5 Preparation for test . 10
5.1 Selection of relevant tests . 10
5.1.1 General . 10
5.1.2 Storage conditions prior to testing . 11
5.1.3 Pre-aging (storage in the supply chain) before testing . 12
5.2 Handling of the specimens . 12
5.3 Sample size . 12
5.4 Surface and base materials for test selection . 12
5.5 Preconditioning of test specimen not intended for soldering/welding . 13
5.5.1 Preconditioning of test specimen intended for press-fit applications . 13
5.5.2 Preconditioning of test specimen intended for mechanical loads other
than press fit . 14
5.6 Preconditioning of test specimen intended for soldering/welding . 14
5.6.1 General . 14
5.6.2 Mechanical pretreatment . 14
5.6.3 Heat pre-treatment . 15
6 Test conditions . 15
6.1 General . 15
6.2 Ambient test . 15
6.3 Damp heat test . 15
6.4 Temperature cycling test . 16
6.5 Ambient test for press-fit applications . 16
7 Monitoring and technological similarity . 17
7.1 Monitoring . 17
7.2 Technological similarity . 17
8 Test and assessment . 18
8.1 Whisker investigation . 18
8.2 Initial measurement . 18
8.3 Test . 18
8.4 Recovery . 18
8.5 Intermediate or final assessment for each test condition . 18
8.5.1 Fixed threshold length for pass/fail classification . 18
8.5.2 Statistical assessment of whisker lengths . 19
IEC 60068-2-82:2019 © IEC 2019 – 3 –
9 Technology or manufacturing process changes . 19
10 Content of final report . 20
Annex A (normative) Measurement of whisker length . 22
Annex B (informative) Examples of whiskers . 23
Annex C (informative) Guidance on acceptance criteria . 25
C.1 Risks attributed to whiskers . 25
C.2 Acceptance criteria for whisker length . 25
C.3 Acceptance criteria for whisker density . 26
C.4 Statistical evaluation of number and length of whiskers. 26
C.5 Example of statistic evaluation .
...
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