Hi,
Resend from yesterday.
Does anyone have any good reasons why storing static sensitive parts in
small plastic containers is "Not Good". See the MOSFETs in these pictures.
We use these small plastic boxes for engineering stock, very convenient.
www.kondner.com/files/partinbox.jpg
www.kondner.com/files/partbox.jpg
Thanks,
Bob Kondner
Kenny,
As long as you just look and don't touch you will not get in trouble! :-)
There was a ESD Expert, I forgot who, who would say "No Spark means No
Problems". Spark was being used to infer current flow, obviously if no
current flows through a junction there is no problem, by definition.
Now we get to the touching of parts. If a part is sitting on an insulator
can any current flow? The answer is yes due to capacitance to free space.
Small parts have very small level of capacitance to free space. I have never
seen numbers but I suspect any current flows would be well below damage
levels.
If you touch a part in a metal drawer wow oh wow is that a different story.
I keep loose parts in plastic containers, that makes some folks cringe but
none has ever explained how a damaging current could be generated to/from a
part in an insulating container.
I would really like to get other folks informed ideas. Too many folks
simply repeat some mantra without having any data. (Like buy the biggest
house you can afford, don't worry about the payments. )
Bob Kondner
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ken Bloomquist
Sent: Wednesday, May 26, 2010 12:20 PM
To: [log in to unmask]
Subject: Re: [TN] ESD spec question
My first thought on this is that if I were looking in the drawers I'd touch
the metal of the cabinet before opening the drawer. Also if the drawers have
a metal handle and are grounded inside the cabinet the by virtue of all that
you would be grounded, no need for anything more.
KennyB
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
Sent: Wednesday, May 26, 2010 9:30 AM
To: [log in to unmask]
Subject: [TN] ESD spec question
Hey TechNet
It's been a quiet day on Technet!
I've got a question regarding ESD. I was taught that if I am not
grounded I do not go near anything that is ESD . The example we are
debating here today concerns parts that are stored in metal cabinets.
The cabinet is grounded, and within the cabinet drawers there are ESD
sensitive parts in individual bins, not covered or packaged (no faraday
cage).
Is it OK to open the drawer and look into the cabinet without being
properly grounded? I say no, but am I being overly cautious?
If "no" is the right answer, where would I find that in an ESD spec?
I've given ESD-S20.20 a quick peruse, nothing jumped out at me.
regards,
Graham Collins
Halifax Production Engineering
(902) 873-2000 ext. 6215
This message and any attachments are solely for the use of the
individual or entity to which it is addressed and may contain
information that is privileged or confidential or controlled technical
data that is subject to the laws of Canada or the United States. If you
are not the intended recipient, any disclosure, use or distribution of
the information contained herein is prohibited. If you have received
this communication in error, please notify the sender by reply e-mail
and immediately delete this message and any attachments.
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
