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Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices
1 FOREWORD
The advent of surface mount devices (SMDs) introduced a new class of quality and reliability concerns regarding damage from the solder reflow process, such as cracks and delamination. This document describes the standardized levels of floorlife exposure for moisture/reflow sensitive SMDs along with the handling, packing, and shipping requirements necessary to avoid moisture/reflow related failures. Companion documents J-STD-020 and J-STD-075 define the classification procedure and JEP113 defines the labeling requirements.
For moisture sensitivity, moisture from atmospheric humidity enters permeable packaging materials by diffusion. Assembly processes used to solder SMDs to printed circuit boards (PCBs) expose the entire package body to temperatures higher than 200 °C. During solder reflow, the combination of rapid moisture expansion, materials mismatch, and material interface degradation can result in cracking and/or delamination of critical interfaces within the device.
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