Yes, I almost forgot. For really tough board surfaces we use PBC fluids in the plasma cleaner instead of conventional gases.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of lduso - Diamond-MT.com
Sent: Wednesday, March 06, 2019 3:18 PM
To: [log in to unmask]
Subject: Re: [TN] [External] Re: [TN] Plasma before Coating
Same here but we also have oxygen available that we use on hard parts
(non-CCAs)
Lloyd Duso
General Manager
Diamond-MT
(814) 535-3505
www.Diamond-mt.com
On Wed, Mar 6, 2019 at 4:05 PM Douglas Pauls <
[log in to unmask]> wrote:
> I would agree. Every time I have looked at open air plasma, it appears
> that it works well for flat substrates, like bare boards, but not for full
> assemblies with any kind of topography.
>
> Out of curiosity, when you vacuum plasma, what gas are you using? We
> generally use argon so as not to blacken silver parts.
>
> *Douglas Pauls *| Principal Materials and Process Engr | Advanced
> Operations Engineering
>
> *COLLINS AEROSPACE*
>
> 400 Collins Road NE, MS 108-101, Cedar Rapids, IA 52498 USA
>
> *Tel:* +1 319 295 2109 | *Mobile: *+1 319 431 3773
>
> [log in to unmask]
>
>
> On Wed, Mar 6, 2019 at 1:50 PM lduso - Diamond-MT.com <
> [log in to unmask]>
> wrote:
>
> > Not as a standard procedure on CCAs but a couple here and there. It came
> > about due to poor surface energy tests and it does help. Quite often on
> > metallic parts like stainless steel and nickel before parylene coating.
> All
> > done in a vacuum. Although I would love to try open-air plasma.
> >
> > Lloyd Duso
> > General Manager
> > Diamond-MT
> > (814) 535-3505
> > www.Diamond-mt.com
> > <
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.Diamond-2Dmt.com&d=DwMFaQ&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-HFP9fxIkv6fRnV49HE&m=w13JU2W1V8UO5sePYWQBU04jy9DhgL4qXpKHfLaXFpA&s=xlQdpAXqDTjxXvzI2GcrjVv6--XbIxDd8PTkCsO-6WE&e=
> >
> >
> >
> > On Wed, Mar 6, 2019 at 2:42 PM Douglas Pauls <
> > [log in to unmask]> wrote:
> >
> >> Good morning all,
> >> Are any of you routinely treating assembly surfaces with plasma prior to
> >> conformal coating? We do not, except for very niche applications, but I
> >> wanted to see if that was a mainstream process for anyone else.
> >>
> >> *Douglas Pauls *| Principal Materials and Process Engr | Advanced
> >> Operations Engineering
> >>
> >> *COLLINS AEROSPACE*
> >>
> >> 400 Collins Road NE, MS 108-101, Cedar Rapids, IA 52498 USA
> >>
> >> *Tel:* +1 319 295 2109 | *Mobile: *+1 319 431 3773
> >>
> >> [log in to unmask]
> >>
> >
>
|
