TECHNET Archives

September 2004

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:
Mike Fenner <[log in to unmask]>
Reply To:
Date:
Wed, 15 Sep 2004 14:39:27 +0100
Content-Type:
text/plain
Parts/Attachments:
text/plain (100 lines)
Same as us: The young folks will be surprised to find they are now the old folks and wishing they'd paid more attention ☺ 

Regards 

Mike 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of - Bogert
Sent: Wednesday, September 15, 2004 10:39 AM
To: [log in to unmask]
Subject: Re: [TN] (2)PWB Conductive Contamination Under Solder Mask; What Can ...


September 15, 2004

Thanks for the information and history lesson.  What happens in the world when all of us old folks are no longer here?

PS can you give me details on your book and where to purchase it?  Thanks
  ----- Original Message ----- 
  From: Brian Ellis<mailto:[log in to unmask]> 
  To: [log in to unmask]<mailto:[log in to unmask]> 
  Sent: Tuesday, September 14, 2004 1:55 AM
  Subject: Re: [TN] (2)PWB Conductive Contamination Under Solder Mask; What Can ...


  You must be aware that using abrasive brushing (Scotchbrite (R) or
  slurry) is a major cause of solder dewetting. Micro-particles of
  abrasive get implanted in the metal, which is even swaged over some of
  them. I have PROVED this time and time again. I published this in a
  paper 'New Aspects on the Solderability of Printed Circuits' in the
  Technical Proceedings of Inter/Nepcon '69, in Brighton, as well as in my
  book (pp. 76 ff). It is amazing that a problem that was identified 35
  years ago is still largely ignored! :-(

  Brian

  Susan Mansilla wrote:
  > Hi Mike and All
  > I am familiar with the abrasive wheel cleaning processes. but those are done
  > AFTER the tin/lead has been stripped.  The response I got indicated that the
  > abrasive was used on the Tin/Lead deposit, which didn't follow my idea of a
  > possible process flow.
  > Some PCB fab shops continue to use a "Scotch Brite" style of
  > abrasive wheel or brush as a final surface prep operation prior to
  > soldermask application.
  > Susan Mansilla
  > Robisan Lab
  >
  > ---------------------------------------------------
  > Technet Mail List provided as a service by IPC using LISTSERV 1.8e
  > To unsubscribe, send a message to [log in to unmask]<mailto:[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]<mailto:[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]<mailto:[log in to unmask]>: SET Technet Digest
  > Search the archives of previous posts at: http://listserv.ipc.org/archives<http://listserv.ipc.org/archives>
  > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16<http://www.ipc.org/contentpage.asp?Pageid=4.3.16> for additional information, or contact Keach Sasamori at [log in to unmask]<mailto:[log in to unmask]> or 847-509-9700 ext.5315
  > -----------------------------------------------------
  >
  >

  ---------------------------------------------------
  Technet Mail List provided as a service by IPC using LISTSERV 1.8e
  To unsubscribe, send a message to [log in to unmask]<mailto:[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]<mailto:[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]<mailto:[log in to unmask]>: SET Technet Digest
  Search the archives of previous posts at: http://listserv.ipc.org/archives<http://listserv.ipc.org/archives>
  Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16<http://www.ipc.org/contentpage.asp?Pageid=4.3.16> for additional information, or contact Keach Sasamori at [log in to unmask]<mailto:[log in to unmask]> or 847-509-9700 ext.5315
  -----------------------------------------------------

---------------------------------------------------
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 847-509-9700 ext.5315
-----------------------------------------------------


:::::::::::::::::::::::::::

This email, its content and any files transmitted with it are intended solely for the addressee(s) and may be legally privileged and/or confidential. If you are not the intended recipient please delete and contact the sender by return and delete the material from any computer. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited.

Messages sent via this medium may be subject to delays, non-delivery and unauthorized alteration. This email has been prepared using information believed by the author to be reliable and accurate, but Indium Corporation makes no warranty as to accuracy or completeness. In particular, Indium Corporation does not accept responsibility for changes made to this email after it was sent. Any opinions or recommendations expressed herein are solely those of the author. They may be subject to change without notice.

:::::::::::::::::::::::::::

---------------------------------------------------
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 847-509-9700 ext.5315
-----------------------------------------------------

ATOM RSS1 RSS2