Subject: | |
From: | |
Reply To: | |
Date: | Mon, 13 Feb 2006 11:32:09 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
I am not sure what the surface energy is referring to, but what is
important to most users if the Dielectric Withstanding Voltage.
IPC-SM-840C requires a 500 VDC minimum DWV performance on the finished
product. Based on your specific materials performance characteristics,
the minimum required thickness can be determined.
IPC-SM-840 is a basic guideline for the soldermask suppliers and some
basic testing guidelines for the user. We also use Telcordia (BellCore)
TA-NWT-000078 which has some specific qualification and testing
requirements for SIR, etc.
Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
Voice - 802.257.4571 ext 37
Fax - 802.257.0011
<http://www.vtcircuits.com/>
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Leigh Jansen
Sent: Monday, February 13, 2006 6:59 AM
To: [log in to unmask]
Subject: [TN] SOLDER RESIST - PRODUCTION STANDARDS
Dear all,
I would be very keen to find out from both board manufacturer and end
user
perspectives what standards (national/international or otherwise) that
you
follow to control the quality of solder resist coated boards.
IPC SM840 relates to solder resists but would not look at the surface
energy
of the resist coating ? Does anyone specify a minimum or maximum value
or
range for QA purposes ?
Thanks,
Leigh Jansen
Development Manager
Concoat Ltd
Alasan House, Albany Park, Frimley Road, Camberley, Surrey GU16 7PH
Tel: 01276 691 100 Mobile 07919 470 959
Providing Reliability in Electronics
A British Manufacturer : Part of Chase Specialty Coatings
www.conformalcoating.com <http://www.conformalcoating.com/>
www.concoat.co.uk <http://www.concoat.co.uk/>
www.chasespecialtycoatings.com/info.html
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
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 1.8e
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
-----------------------------------------------------
|
|
|