Blue typically is dissipative. Black typically is conductive.
Manufacturers would need to be contacted regarding expected life.
Both meet the minimum recommended technical requirements of ANSI/ESD S20.20
Table 1 which for ESD Packaging is:
Conductive < 1 X 10^4 ohms
Dissipative 1 X 104 to < 1 X 10^11 ohms
However, per ANSI/ESD S541-2003 for the Protection of Electrostatic
Discharge Susceptible Items Packaging Materials for ESD Sensitive Items
section 7.2.2 "Packaging materials that are in intimate contact with [ESD
sensitive] devices should be dissipative."
Gene Felder
[log in to unmask]
-----Original Message-----
From: Dobbs, Marie [SMTP:[log in to unmask]]
Sent: Tuesday, March 30, 2004 12:40 PM
To: [log in to unmask]
Subject: Re: [TN] ESD TOTES BLACK VS. BLUE
IMHO
ESD is a huge misunderstanding. Can ESD damage PCB's and components, sure,
but who is willing to take the risk is the real question.
Black totes cost VS the Blue. Huge difference. Black provide a better
faraday cage IF they are used with a cover. Blue, gray, red, can be less
effective, but if your like us, your using ESD static shielding bags and
then placing the boards in any colored tote.
again, just my opinion
Marie
-----Original Message-----
From: Lance Mayes [mailto:[log in to unmask]]
Sent: Tuesday, March 30, 2004 3:04 PM
To: [log in to unmask]
Subject: [TN] ESD TOTES BLACK VS. BLUE
Importance: High
Hey again Technetters;
I've been watching the IPC Demo CD on ESD. While watching I saw they were
using blue totes to transport PBW's and components. We were told that
blue totes were not good to use, so our company went out and purchased a
huge amount of black totes. Are the black ones better constructed or
what? Or was this a salespersons tactic for a sale? We were told the
black totes had the ESD material in the plastic and the blue had a
coating sprayed on which would wear off in a few years. Which is true?
Anyone?
Thanks ahead of time
P. Lance Mayes
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