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IEC 60747-5-13
Edition 1.0 2021-06
INTERNATIONAL
STANDARD
Semiconductor devices –
Part 5-13: Optoelectronic devices – Hydrogen sulphide corrosion test for
LED packages
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IEC 60747-5-13
Edition 1.0 2021-06
INTERNATIONAL
STANDARD
Semiconductor devices –
Part 5-13: Optoelectronic devices – Hydrogen sulphide corrosion test for
LED packages
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.080.99 ISBN 978-2-8322-9852-7
– 2 – IEC 60747-5-13:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Test apparatus . 8
4.1 General . 8
4.2 Test jig. 8
4.3 Test setup . 8
5 Test atmosphere . 9
6 Preconditioning. 9
6.1 General . 9
6.2 Hygroscopic treatment . 9
7 Method . 10
7.1 Initial measurements . 10
7.2 Procedure . 10
7.3 Final measurements. 11
8 Details to be specified . 12
Annex A (informative) Information to predict luminous/radiant flux degradation in
particular conditions from the test results . 13
A.1 Correspondence relation between hydrogen sulphide corrosion test and
indoor corrosivity categories . 13
A.2 Correspondence relation between the result of this corrosion test and the
corrosion in the field environment (Case example) . 14
Annex B (informative) Method for determining the mass increase of silver test pieces . 15
B.1 Purpose . 15
B.2 Method . 15
B.3 Silver test pieces . 15
B.4 How to place silver test pieces . 15
Annex C (informative) Silver test piece for corrosion monitoring . 17
C.1 Specimens . 17
C.2 Preparation . 17
Annex D (informative) Gas concentrations set up of test atmosphere . 18
D.1 General . 18
D.2 Reason about no allowable range of each gas concentration . 18
D.3 Application of the actual test . 18
Bibliography . 19
Figure 1 – Example of setup . 9
Figure 2 – Example of LED luminous flux maintenance factor before & after
hygroscopic treatment . 10
Figure A.1 – Mass increase example of silver test piece hydrogen sulphide corrosion test . 14
Figure B.1 – Example of layout of silver test pieces . 16
Table A.1 – Description of typical environments related to the estimation of indoor
corrosivity categories in ISO 11844-1:2006, Table D.3 . 13
Table A.2 – The upper limit of mass increase of silver test pieces in the indoor
environment of corrosivity category in ISO 11844-1:2006 for approximately ten years’
usage . 14
– 4 – IEC 60747-5-13:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SEMICONDUCTOR DEVICES –
Part 5-13: Optoelectronic devices –
Hydrogen sulphide corrosion test for LED packages
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60747-5-13 has been prepared by subcommittee 47E: Discrete semiconductor devices, of
IEC technical committee 47: Semiconductor devices. It is an International Standard.
The text of this International Standard is based on the following documents:
FDIS Report on voting
47E/746/FDIS 47E/751/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at /members_experts/refdocs. The main document types developed by IEC are
described in greater detail at /standardsdev/publications.
A list of all parts in the IEC 60747 series, published under the general title Semiconductor
devices, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – IEC 60747-5-13:2021 © IEC 2021
INTRODUCTION
This part of IEC 60747 provides the accelerated test method to assess effects of the tarnishing
of silver and silver alloys used for LED packages due to hydrogen sulphide, because sulphide
gas (H S) tarnishes silver used in LED packages and causes lumen degradation.
There are some existing environmental stress test standards, but they intend to test contacts
and connections, not LED lumen degradation. IEC 60068-2-43 provides useful information to
assess effects to the contact resistance for contacts and connections due to corrosion of silver
and silver alloy. Because the criterion performance in IEC 60068-2-43 is contact resistance, it
is not applicable to LED packages to determine effects to the luminous/radiant flux maintenance.
For LEDs, light output should be measured, but there is no such provision in existing standards.
Therefore, this document has been drawn up.
This document provides the accelerated test method with mixture gas (H S
...