TECHNET Archives

February 2007

TechNet@IPC.ORG

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

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

Print Reply
Sender:
X-To:
TechNet E-Mail Forum <[log in to unmask]>, "Upton, Shawn" <[log in to unmask]>
Date:
Thu, 22 Feb 2007 14:46:00 -0600
Reply-To:
TechNet E-Mail Forum <[log in to unmask]>, "Stadem, Richard D." <[log in to unmask]>
Subject:
From:
"Stadem, Richard D." <[log in to unmask]>
Content-Transfer-Encoding:
quoted-printable
In-Reply-To:
Content-Type:
text/plain; charset="us-ascii"
MIME-Version:
1.0
Parts/Attachments:
text/plain (67 lines)
An ENIG PWB presents little in the way of packaging/storage requirements
except safe handling issues. The gold prevents any oxidation. 
However, on a separate note, ENIG has some major solderability issues.
You may wish to become educated in those. The best way to do so is to
google the terms "dissolution rate of nickel into tin", "black pad",
"brittle interfacial fracture" etc. There are a lot of good articles on
that subject. Better yet, just google "Werner Engelmaier" and you will
get all of the real information without any BS.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Upton, Shawn
Sent: Thursday, February 22, 2007 11:45 AM
To: [log in to unmask]
Subject: Re: [TN] Immersion silver handling

What about gold imersion?  A board assembly house indicated they
prefered gold over silver.  Is gold easier to handle?

Shawn Upton, KB1CKT
Test Engineer
Allegro MicroSystems, Inc
[log in to unmask]
603.626.2429/fax: 603.641.5336

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Burke
Sent: Thursday, February 22, 2007 12:10 PM
To: [log in to unmask]
Subject: Re: [TN] Immersion silver handling

Do not delay between assembling the front and back of the board.

Wear gloves when handling

Do not open until ready to use them and make sure the vendor supplies
them with silver saver interleave paper

Be very careful on washing off mis-printed boards not to contaminate or
degrade the surface.

Just a few thoughts I am sure others will have more.

John

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

ATOM RSS1 RSS2