HASL does not leave a flat surface for the screen print operation, this is
especially true for very fine pinch boards.  Plus OSP is a "cleaner"
process, MANY of the fab shops are not properly equipped to clean
boards after the HASL operation.  If a fab shop can't clean a board to <3
mg. cl. sq. in.  they shouldn't sell boards that are to be used in a no-clean
process.  I'm sure CSL will add to this one.  This is a BIG issue to all of us
building high reliability products.

>>> Sheila Smith <[log in to unmask]> 01/23/98 03:27pm >>>
Hello,  Please refresh my memory ... what are the
advantages/disadvantages
of HASL over other processes?  Specifically, why would a Customer
direct a
PWB supplier that HASL is not to be used ...?

Sheila Smith

################################################################
TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional
information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or
847-509-9700 ext.311
################################################################

################################################################
TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################