IEC 62435-7:2020

Electronic components - Long-term storage of electronic semiconductor devices - Part 7: Micro-electromechanical devices

IEC 62435-7:2020 on long-term storage applies to micro-electromechanical devices (MEMS) in long-term storage that can be used as part of obsolescence mitigation strategy. Long-term storage refers to a duration that may be more than 12 months for products scheduled for storage. Philosophy, good working practice, and general means to facilitate the successful long-term storage of electronic components are also addressed.

Composants électroniques - Stockage de longue durée des dispositifs électroniques à semiconducteurs - Partie 7: Dispositifs microélectromécaniques

L'IEC 62435-7:2020 relative au stockage de longue durée s’applique aux dispositifs microélectromécaniques (MEMS - micro-electromechanical device) du stockage de longue durée qui peuvent être utilisés dans le cadre d’une stratégie de réduction de l’obsolescence. Le stockage de longue durée implique une durée qui peut être supérieure à 12 mois, pour les produits destinés à être stockés. Les concepts, les bonnes pratiques professionnelles et les moyens généraux de nature à faciliter un stockage optimum de longue durée de composants électroniques sont aussi traités.

General Information

• Status: Published
• Publication Date: 03-Dec-2020
• 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: 09-Jan-2021
• Completion Date: 04-Dec-2020

Standards Content (Sample)

IEC 62435-7 ®
Edition 1.0 2020-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electronic components – Long-term storage of electronic semiconductor
devices –
Part 7: Micro-electromechanical devices

Composants électroniques – Stockage de longue durée des dispositifs
électroniques à semiconducteurs –
Partie 7: Dispositifs microélectromécaniques

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IEC 62435-7 ®
Edition 1.0 2020-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electronic components – Long-term storage of electronic semiconductor

devices –
Part 7: Micro-electromechanical devices

Composants électroniques – Stockage de longue durée des dispositifs

électroniques à semiconducteurs –

Partie 7: Dispositifs microélectromécaniques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.020 ISBN 978-2-8322-9147-4

– 2 – IEC 62435-7:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Storage considerations . 9
4.1 Overview of MEMS applications . 9
4.2 Failure mechanisms . 9
4.2.1 Occurrence of failure and driving force . 9
4.2.2 Storage environment and mitigation for stimuli to prevent failure . 12
4.3 Materials management . 13
4.4 Storage media . 13
4.5 Documentation/paper lot identifiers . 14
4.6 Inventory check. 14
4.7 Inventory dry packing refreshing . 14
4.8 Inventory re-assessment . 14
5 Baseline long-term storage requirements . 14
5.1 General . 14
5.2 Moisture sensitivity designation . 15
5.3 Dry packing for storage . 15
5.4 Non-moisture sensitive device storage . 15
5.4.1 General . 15
5.4.2 Storage media . 15
5.4.3 Lot data and labelling . 15
5.5 Storage of MEMS devices before assembly – Wafer level and die level
storage . 15
5.6 Storage of moisture sensitive finished devices . 15
5.6.1 Moisture barrier bag . 15
5.6.2 Dunnage . 16
5.6.3 Humidity indicator card . 16
5.6.4 Desiccant . 16
5.6.5 Labelling . 16
5.6.6 Lot data and labelling . 16
5.6.7 Storage environment . 17
5.6.8 Process (temperature) sensitivity designation . 17
Annex A (informative) Packaged or finished device storage environment
considerations . 18
Bibliography . 19

Table 1 – Failure mechanisms in storage and stimuli to mitigate during storage . 10
Table 2 – Long-term environment – sustained condition requirements . 13
Table 3 – Considerations for management, control and documentation during storage . 13
Table A.1 – Long-term storage environment – sustained condition considerations . 18

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

Part 7: Micro-electromechanical devices

FOREWORD
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IEC 62435-7 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 R
...