TECHNET Archives

April 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:
Re: Different current densities in the Macdermid tin-lead ba th
From:
Smith Russell MSM LAPO US <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 1 Apr 1999 08:44:00 +0200
Content-Type:
multipart/mixed
Parts/Attachments:
text/plain (712 bytes) , application/ms-tnef (1803 bytes) 
In a word yes Current density will effect the ratio of tin/lead in ALL
HBF4 based baths ,( not exclusively the McD bath ) Over time you could
see a change in the metal ratio in solution, this could be minimal or
nessessitate  metal adds . It all depends on the average current density
. The solution to work ratio effects how rapid and how large the change
will be , the larger the tank in relation to panel size and through
slower the change.
        FOr more detailed information and a good reference source try
the AESF in Orlando Fl.
 ----------
From: Francis Lai
To: [log in to unmask]
Subject: [TN] Different current densities in the Macdermid tin-lead bath
Date: Wednesday, March 31, 1999 8:28PM


<<File Attachment: Lai.doc>>

ATOM RSS1 RSS2