Hi Cormac! There are large number of pros and cons to consider when
comparing OSP vs HASL. I would recommend signing up for a class on surface
finishes in conjunction with either an SMTA or IPC conference. The SMTA
conference in Chicago in October has a surface finish class given by Jenny
Hwang and I'll bet that the IPC Fall conference in Orlando in October has a
surface finish class by Mike Carano. Either class would give you a detailed
comparison of OSP and a number of the alternative solderable finishes
versus HASL. Also, IPC has conference proceedings from  3 Surface Finish
Conferences (Bloomington MN 1997, Austin TX 1998, Irvine CA 1999) which
contain a wealth of technical articles which could be useful to you (check
the IPC website for the proceedings availability). Good Luck.

Dave Hillman
Rockwell Collins
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Cormac MacMahon <[log in to unmask]>@IPC.ORG> on 06/28/2001
11:56:46 AM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
      to Cormac MacMahon <[log in to unmask]>

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Subject:  [TN] **** PCB's - HASL -v- OSP


Folks,

I am an NPI Engineer at Artesyn technologies and I am new to the Surface
Mount
Technology. Can anyone shed some light on the differences between HASL and
OSP.
We are currently using HASL but are looking at migrating to OSP. What are
the
pros and cons of one over the other? What sort of processing issues do we
see
with OSP on SMT lines?

Any help appreciated
Cormac MacMahon

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