TECHNET Archives

April 2009

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Peter Swanson <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Peter Swanson <[log in to unmask]>
Date:
Wed, 29 Apr 2009 18:28:15 +0100
Content-Type:
text/plain
Parts/Attachments:
text/plain (84 lines)
I think these things work in two ways:

1) A substance which relies on absorbed moisture to make the surface
static dissipative. Performance will therefore rely on relative
humidity. Most common types are like this. 

2) A substance which has an inherently conductive ingredient, albeit a
low conductivity (e.g. ITO?). These are not humidity dependent.

I would not call the first type "permanent". The second type should work
for long periods unless other factors kick in. 

For both types, permanency will also depend on adhesion to the substrate
and resistance to any abrasion or other wear & tear. If your fixture is,
say, made of ptfe and is subject to a lot of stuff rubbing against it,
then I would guess "permanent" is also unlikely.

Like all ESD measures, regular audits are best.

Regards,
Peter

--------------------------------------------------------
Peter Swanson           [log in to unmask]
INTERTRONICS               http://www.intertronics.co.uk
Tel: +44 1865 842842                Oxfordshire, England
 
INTERTRONICS is dedicated to providing quality material, consumable
and equipment solutions to the high technology, high performance
assembly industries, incorporating outstanding levels of technical
support and customer service.

Read our news! http://www.intertronics.co.uk/blog/blog.htm

INTERTRONICS is the trading name of Cygnet Electronics Ltd,
registered in England No 1835617. Registered office:
17 Station Field Industrial Estate, KIDLINGTON, Oxfordshire, OX5 1JD,
ENGLAND.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Lee Whiteman
Sent: 29 April 2009 18:08
To: [log in to unmask]
Subject: [TN] STATIC DISSIPATIVE COATINGS

Has anyone ever used static dissipative coatings? 

There is a coating manufacturer whose claims that their coating when
applied will make a fixture permanently static dissipative.

Any thoughts?

Thanks...

Lee Whiteman, PMP
Senior Member Engineering Staff
L-3 Communications East
Telephone: (856) 338-3508
FAX: (856) 338-2906
E-Mail: [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
-----------------------------------------------------

---------------------------------------------------
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
-----------------------------------------------------

ATOM RSS1 RSS2