Shelf life and the ability to withstand multiple soldering operations is the
standard answer Victor.  And while there is an enormous range of alternative
protective coatings on offer now, some better than others; all OSP's and
other 'non fused' protective coatings only 'protect' the copper from
oxidising, they say little about the solderability of the copper.

A fused solder coating confirms the solderability of each interconnection
site as well as the integrity of the whole board to withstand the soldering
processes. And it will always be easier to solder to solder than copper.

63Sn37Pb Horizontal HASL results in 'free solder' thicknesses that are
typically between 1 and 20 microns. Our experience to date suggests that the
Pb free alloys will allow this range to tighten down to 2 to 10 microns.

-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Monday, June 28, 2004 4:28 PM
To: [log in to unmask]; [log in to unmask]
Subject: RE: [LF] Lead-Free HAL


Pete,

   What is the advantage of using a LF HASL versus other OSP finish.

Victor,

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Pete Lymn
Sent: Monday, June 28, 2004 9:29 AM
To: [log in to unmask]
Subject: Re: [LF] Lead-Free HAL


Any UK Manufacturer could provide you with a lead free HASL finish by using
a local 'out source' service David. We would be please to process any
samples for you FOC.

-----Original Message-----
From: David Suraski [mailto:[log in to unmask]]
Sent: Friday, June 25, 2004 8:30 PM
To: [log in to unmask]
Subject: [LF] Lead-Free HAL


Anyone know of any companies currently making lead-free hot air leveled
boards?  Thanks!

Regards,

David Suraski
AIM
+1-401-463-5605 ext. 5210
www.aimsolder.com

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