The answer to your question is, YES. In accordance to EOS/ESD
standards, an ESD floor in conjunction with Heel Grounders, ESD Booties,
ESD Foot Wear does NOT take the place of using Personnel grounded Wrist
Straps at the workstation. So the basic ESD program would include the
technician wearing a Wrist Strap.
Protective personnel grounding products such as; heel straps, booties
and shoes working in conjunction with an ESD floor are designed for
processes within your ESD program where the technician has to be mobile
within an ESDPA, (ESD Protected Area) where the electrostatic sensitive
device is not protected in an ESD protective container or shielded in
some manner, e.g. ESD Bag, Bin, Tote, Box, Tray, Container, etc.
If your process has technical personnel setting or standing at a
workstation they DO require grounding via a Wrist Strap. So one doesn't
necessarily take the place of the other, and both may be required
depending on your personnel and their mobility throughout the plant.
If your technical staff removes their wrist strap to transport an ESD
sensitive device or component outside the ESD protected area, the device
also needs to be shielded as well as the technician being properly
outfitted with ESD shoes, booties or heel straps. Within the ESDPA,
they do require the additional shielding protection of the device, but
it is always a good idea when practical.
I hope this helps address your question, please let us know if we can be
of further assistance with any ESD questions or ESD protective product
requirements you and your team may be sourcing.
As always, your satisfaction and ESD program are our highest priority!