Pete,
Can you further explain your comment "free solder' thickness. Does
this refer to solder thickness on pads after process.
Victor,
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Pete Lymn
Sent: Tuesday, June 29, 2004 7:24 AM
To: [log in to unmask]
Subject: Re: [LF] Lead-Free HAL
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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