Using proper labeling procedures can ensure that an ESD-sensitive device
will be protected up to the point when it is removed from the ESD-protective
bag by the customer.
Q. When packaging sensitive devices in ESD-protective bags,
is it necessary to use special labels to close the bags? Can I print
my own stickers? Do I have to use special paper?
A. Unless required by agreement with another company, distributor,
or end-user, the choice of label or sticker used to close the bag is
open to the supplier of the product. As a guideline, here are some label
characteristics and application suggestions for those who are either
purchasing preprinted labels or printing their own.
Select a label material that is low charge generating. Most paper labels
are low charge generating after they are applied. The greatest charge
generation occurs when labels are removed from their backing or release
Always perform the packaging operation using a fully functional ESD-protective
workstation. Make sure that the device is placed well inside the bag
before the label is removed from its backing. Untreated Mylar and plastic-coated
labels can retain significant charge after separation from their release
liners, and they tend to tribocharge during shipping and handling. As
an alternative, consider some of the static-dissipative plastic labels
and dissipative paper materials that are available on the market.
Incorporate an ESD warning symbol on the label. There are several versions
of ESD warning symbols available on preprinted paper labels. Use the
warning symbols shown in ANSI EOS/ESD S8.1.
Wear a grounded wrist strap when peeling the label from its backing.
This helps to drain charge from the label before it is applied to the
Evaluate the charge that is generated by the labeling process. Use
appropriate charge-mitigation techniques. For a guideline, see ANSI/ESD
S20.20 Section 18.104.22.168.
Provide bold ESD-handling precautions. Both the label and installation
instructions should provide bold warnings that ESD precautions must
be observed before opening the bag. By following these recommendations,
you will have done a good job of protecting the ESD-sensitive device
up to the point when the customer opens the bag. As long as the customer
follows proper ESD-protective procedures, the device should have a long
life expectancy and operate as designed.