PAS 62168:2000 pdf download Symbol and labels for moisture-sensitive devices
1 Introduction
Certain plastic surface-ount components are subject to permanent damage due to moisture-induced failures encountered during high-temperature surface-mount processing unlessappropriate precautions are observed.
2 Purpose
The purpose of this publication is to provide a distinctive symbol and labels to be used to identifythose devices that require special packing and handling precautions.
3 Reference documents
J-STD-020 Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State SurfaceMount Devices
J-STD-033 Standard for Handling And Shipping Of Moisture/Reflow Sensitive Surface MountDevices
4 Symbol and labels
4.1 Moisture-sensitive symbol
This symbol (see Figure 1) indicates that devices are moisture sensitive to a level from 2 to 6 andit appears on all moisture sensitive caution labels (see Figure 4).
4 Symbol and labels (cont’d)
4.2 Moisture-Sensitive Identification (MSID) label
This label should be on the lowest level shipping container to indicate that moisture-sensitivedevices are in the container. This label is recommended to be a minimum of 3/4 inch (19millimeters) in diameter. See Figure 2.
4.3 Moisture-sensitive caution labels
4.3.1 Level 1
This label is required only if the classification temperature is 235 °C and shall be placed on the lowest level shipping container to identify the devices as “NOT MOISTURE SENSITIVE”. See Figure 3.
4 Symbols and Labels (cont’d)4.3.2 Levels 2-5a
The moisture-sensitive caution label shall be used for levels 2, 2a. 3, 4. 5. and 5a as defined byJ-STD-020. See Figure 4. This label is required on the moisture barrier bag and will provide thefollowing information:
(a) Moisture classification level.
(b) The calculated shelf life in the sealed bag
(C) The peak package body temperature (Top surface) used for device classification asdefined by J-STD-020.
(d) The floor life of the device at 30 C/60%RH as defined by J-STD-020
(e) The bag seal date utilizing “MMDDYY”,“YYwwor equivalent format.
An acceptable alternative will be to provide the above information on the adjacent bar code label.
4 Symbols and Labels (cont’d)
4.3.3 Level 6
Level 6 devices must be identified as “EXTREMELY MOISTURE SENSITIVE”.See Figure 5.This label is required on the moisture barrier bag and/or the lowest level shipping container. Thelabel must specify the peak package body temperature at which the device was classified. If therequired information is not provided on the caution label then it must be on the adjacent bar codelabel.
Level 6, as defined by J-STD-020, does not require that devices be shipped in a moisture-barrierbag with desiccant, etc. (dry-pack), since these devices require baking by the end user before useHowever, moisture-barrier bags have become a “symbolfor moisture-sensitive devices andtherefore are recommended to be used with level 6 device shipments. It is also recommendedthat these bags be sealed even though desiccant and humidity indicator cards (HIC) may not beinside the bags.