TECHNET Archives

August 1999

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:
Roger Massey-G14195 <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 19 Aug 1999 16:34:55 +0100
Content-Type:
text/plain
Parts/Attachments:
text/plain (68 lines)
     Yasmeen,

        Assuming you need to look at the structure, and dont want to fully
     remove the Sn-Pb,

         I have used the following as a general etchant in the past with
     good results. Use a swab to get a more even etching, or take care in a
     petri dish

        10ml Acetic acid,  mix with
        80ml Glycerol  and then add
        10ml of Nitric acid

        etch time 2-10s depending on how far you want to etch into the
     structure and what you are looking for.

        Lead will be darkened

        alternativley,
     use 5g of silver nitrate in 95ml of DI water if you want a high
     contrast

                Good luck

              Roger
              Motorola AIEG


______________________________ Reply Separator _________________________________
Subject: [TN] Etchant for SnPb solder
Author:  "TechNet E-Mail Forum." <[log in to unmask]> at #email
Date:    19/08/99 09:07


Hello Everyone!
    What is a good etchant for SnPb (60/40) Solder?
Thanks,
Yasmeen

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text
in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################

ATOM RSS1 RSS2