(1) rigid flex do if laminate using PSA
(2) PWB depends - Teflon do a bit, polyimide a little, epoxy not really.
(3) if you use water based diamond polishing and worry about the swelling,
why not use IPA based spray?  LECO type come in as spray can (75.00 USD
per can.. or more).
jk
> Hi Victor-
>
> The laminate doesn't swell significantly.
>
> The problem is that when you go over about 50X optically, the depth of
> field becomes too small to get a clear image. There is at least one
> company who automatically creates a focused composite image from a
> motorized stage microscope, but I don't think you want to buy one (big
> $$). SEM doesn't have that problem.
>
> Wayne
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of
> [log in to unmask]
> Sent: Wednesday, March 08, 2017 8:22 AM
> To: [log in to unmask]
> Subject: [TN] PWB Laminate Swelling
>
> Fellow TechNetters:
>
>    Does PWB laminae swell during the cross sectioning process on an
> encapsulated mount?   During a 100x Optical inspection of the glass
> weave cloth I get a blur image.   I get a sharp image of the glass
> cloth in the SEM.   I can even count the individual rods and measure
> their diameters.
>
> Victor,
>