Hello Kathy,

I have tested both SR inks (several models of PSR 4000 and DSR 2200)
extensively here in our PCB manufacturing plant. Based on our experience,
PSR 4000 has a better resolution (more capable of fine SR lines) and
developability than DSR 2200. But, if your PCB house can produce fine
resolution SR with DSR 2200 then there should be no problem at all.

DSR 2200 is good for boards with surface finishing of electroless Ni-Au or
tab plating. Insulation resistance and other electrical properties are more
or less the same for the two inks.

That is all.

Ray Honorio
NEC-CPI PWB Division

----------
> From: Kathy Palumbo <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] PCB Material Change
> Date: Thursday, September 03, 1998 1:13 AM
>
> Currently our PCB house is using a lamination material called Nanya
> di-functional, and are requesting to change to Nanya Tetra-functional.
>
> They would also like to change the soldermask they use from Taiyo PSR
4000
> to Tamura DSR 2200.
>
> They state they have run extensive tests and found the substitute
materials
> to be as good or better than the current material they use.
>
> Since I am not familiar with these materials I was wondering if any of
you
> technetters have any comments with regards to whether you think this
would
> be an acceptable change or not.
>
> You input with regards to this matter is, as always, greatly
appreciated!!
>
> Thanks,
> Kathy Palumbo
>
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