Quite right Doug. I was just trying to answer the question. Although 46058 is supposedly inactive we will still be seeing it called out on new designs for awhile. Just got one last week in fact. The guys doing board layout sometimes don't get the word right away. As for the soldermask spec. I had my first encounter back in Aug.
Merry Christmas to all.
Charles
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Friday, December 19, 2003 10:29 AM
To: [log in to unmask]; Charles Caswell
Subject: Re: [TN] Solder mask for repair
Charles,
MIL-I-46058 is the military specification for conformal coating. It is
inactive for new designs and may be cancelled in the next 12-18 months.
IPC-CC-830B is a functional equivalent. The appropriate specification for
solder mask, which is DoD approved, is IPC-SM-840. Rev C is current.
Doug Pauls
Charles Caswell
<CharlesC@FESCORP To: [log in to unmask]
.COM> cc:
Sent by: TechNet Subject: Re: [TN] Solder mask for repair
<[log in to unmask]>
12/19/2003 07:13
AM
Please respond to
"TechNet E-Mail
Forum."; Please
respond to
Charles Caswell
46058 is the conformal coat spec. I use the same pen for solder mask touch
up. It has proven very good for this purpose. I have wave soldered boards
with this on it. It must be fully cured, not just dry before exposure to
solvents like RMA flux.
-----Original Message-----
From: H. Molema [mailto:[log in to unmask]]
Sent: Friday, December 19, 2003 2:00 AM
To: [log in to unmask]
Subject: Re: [TN] Solder mask for repair
Hi Daan,
We use the Circuitworks Overcoat Pen for repair purposes but usually after
the boards are soldered so I don't know how it will behave during reflow or
wavesoldering.
It's very easy to use you only apply what you need and you don't need to
mix 2 components anymore
The TDS mentions that it meets the requirements of Mil-I-46058C (I'm not
familiar with this one) and IPC-A-610C and there seems to be a toll free
number you can call 1-800-TECH-401
Hope this helps
Happy holidays to everyone out there
Hilbrand
-----Oorspronkelijk bericht-----
Van: d. terstegge
Verzonden: donderdag 18 december 2003 17:12
Aan: [log in to unmask]
Onderwerp: [TN] Solder mask for repair
Hi All,
The 2-component epoxy soldermask that we've always used in our assembly
shop for repairs and modifications of bare boards has gone obsolete. I'm
looking for recommendations on alternative materials.
On the web I found the Circuitworks Overcoat Pen, which seems to me is
a very easy alternative, although this pen contains a green acrylic
conformal coating, and not really a solderresist. Is anyone using this
pen, and is it suitable for high-reliablility (military) boards ?
Daan Terstegge
Thales Communications
Unclassified mail
Personal Website: http://www.smtinfo.net
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