IEC 62435-9:2021

Electronic components - Long-term storage of electronic semiconductor devices - Part 9: Special cases

IEC 62435-9:2021 specifies storage practices encompassing silicon and semiconductor device building blocks of all types that are integrated together to into products in the form of either packages or boards that can be stored as fully assembled units or partial assemblies. Special attention is given to memories as components and assemblies although methods also apply to heterogeneous components. Guidelines and requirements for customer-supplier interaction are provided to manage the complexity.
NOTE In IEC 62435 (all parts), the term "components" is used interchangeably with dice, wafers, passives and packaged devices.

Composants électroniques - Stockage de longue durée des dispositifs électroniques à semiconducteurs - Partie 9: Cas particuliers

L’IEC 62435-9:2021 spécifie les pratiques de stockage de tous les types de blocs modules au silicium et à semiconducteurs, intégrés dans des produits sous la forme de boîtiers ou de cartes qui peuvent être stockés en unités intégralement assemblées ou en ensembles partiels. Les mémoires, qu’il s’agisse de composants ou d’ensembles, font l’objet d’une attention particulière, même si les méthodes s’appliquent également aux composants hétérogènes. Des lignes directrices et des exigences en matière d’interaction client/fournisseur sont données afin de gérer la complexité.
NOTE Dans l’IEC 62435 (toutes les parties), le terme "composants" fait référence aux puces, aux plaquettes et aux dispositifs passifs et encapsulés.

General Information

• Status: Published
• Publication Date: 24-Aug-2021
• ICS: 31.020 - Electronic components in general
• Technical Committee: TC 47 - Semiconductor devices
• Drafting Committee: WG 2 - TC 47/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 24-Sep-2021
• Completion Date: 25-Aug-2021

Standards Content (Sample)

IEC 62435-9 ®
Edition 1.0 2021-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electronic components – Long-term storage of electronic semiconductor
devices –
Part 9: Special cases
Composants électroniques – Stockage de longue durée des dispositifs
électroniques à semiconducteurs –
Partie 9: Cas particuliers
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IEC 62435-9 ®
Edition 1.0 2021-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electronic components – Long-term storage of electronic semiconductor

devices –
Part 9: Special cases
Composants électroniques – Stockage de longue durée des dispositifs

électroniques à semiconducteurs –

Partie 9: Cas particuliers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.020 ISBN 978-2-8322-1016-3

– 2 – IEC 62435-9:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Component storage cases . 9
5 Storage of memory devices . 9
5.1 General . 9
5.2 Semiconductor memory device types . 9
6 Storage of other devices and partial assembly . 11
6.1 General . 11
6.2 Wafer-level chip-scale packages . 11
6.3 Heterogeneous devices. 12
6.4 Modules . 12
7 Storage in alternative environments . 12
7.1 General . 12
7.2 Alternative environments . 12
7.3 Storage environment effect on use reliability . 13
Annex A (informative)  Customer-supplier interaction . 14
Bibliography . 15

Table 1 – Example failure mechanisms and stimuli for memory devices . 10
Table A.1 – Supplier – customer interaction template. 14

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRONIC COMPONENTS – LONG-TERM STORAGE
OF ELECTRONIC SEMICONDUCTOR DEVICES –

Part 9: Special cases
FOREWORD
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IEC 62435-9 has been prepared by IEC technical committee 47: Semiconductor devices. It is
an International Standard.
The text of this International Standard is based on the following documents:
DRAFT Report on voting
47/2700/FDIS 47/2716/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.

– 4 – IEC 62435-9:2021 © IEC 2021
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 www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 62435 series, published under the general title Electronic
components – Long-term storage of electronic 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.
INTRODUCTION
This document applies to the long-term storage of electronic components in special cases of
configuration. The custom-client relationship for storage of all cases is also included.
This document deals with the long-term storage (LTS) of electronic devices drawing on the best
long-term storage practices currently known. For the purposes of this document, LTS is defined
as any device storage whose duration can be more than 12 months for product scheduled for
long duration storage. While intended to address the storage of unpackaged semiconductors
and packaged electronic devices, nothing in this document precludes the storage of other items
under the storage levels defined herein.
Although it has always existed to some extent, obsolescence of electronic components and
particularly of integrated circuits, has become increasingly intense over the last few years.
Indeed, with the existing technological boom, the commercial life of a component has become
very short compared with the life of industrial equipment such as that encountered in the
aeronautical field, the railway industry or the energy sector.
Th
...