Excellent points.  Thank you Odin.

*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

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On Wed, Mar 6, 2019 at 3:06 PM Stadem, Richard D <[log in to unmask]>
wrote:

> Like you, I do not normally plasma etch for the companies I work for
> except for more esoteric assemblies that may need to get coated as quickly
> as possible after die attach and/or wire bond processes. I simply have
> never had a need to because for "normal" processing of "normal" PWBs
> standard wash processes provide a clean, dry surface to bond to.
> But there have been times that I used plasma to clean and slightly etch
> the bare boards PRIOR to assembly simply because the buttercoat or
> soldermask was so glossy that it was difficult to get a good coating bond
> in spite of "perfect" cleaning processes. But that seldom happens anymore.
> I am not aware of plasma being a mainstream process simply because of the
> cost of gas nowadays.
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
> Sent: Wednesday, March 06, 2019 1:42 PM
> To: [log in to unmask]
> Subject: [TN] Plasma before Coating
>
> 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]
>