Brian,
I already wrote,that I am not sure about dates, definistions etc.
We are dealing with suppliers of Solder Mask and they are pushing forward
"Halogen Free" formulations. This is how I got idea about need for HF solder
mask. Since I am not sure about the whole issue, I posted this question to
forum.
So what are really future regulations on HF ( not related to RoHS
regulations to be effective next year ).
Of course I am going to aske our suppliers of Solder Mask why they are
proposing HF formulations.
Edward
Edward Szpruch
Eltek Ltd
P.O.Box 159 ; 49101 Petah Tikva Israel
Tel ++972 3 9395050 , Fax ++972 3 9309581
e-mail [log in to unmask]
web site : www.eltekglobal.com
> -----Original Message-----
> From: Brian Ellis [SMTP:[log in to unmask]]
> Sent: ג אפריל 12 2005 10:17
> To: Environmental Issues; Edward Szpruch
> Subject: Re: [EN] Halogen Free Solder Mask
>
> What gives you the idea of HF being mandatory by 2007? In any case,
> epoxy resis are rarely halogen free, because the epoxy group is supplied
> by epichlorohydrin. Granted that most of the resultant chloride in the
> prepolymerisation reaction is largely removed, but there is always some
> left, and this assumes a stoichiometric reaction. Most of the halides in
> normal FR-4 are from TBBPA, which is not targeted by the EU directives.
> Do you know of any other political entity wanting to ban TBBPA?
>
> As for solder masks, there could be 101 (well, nearly!) chemistries
> involved, and each would have to be taken on its own merits. It would be
> impossible to generalise.
>
> Brian
>
> Edward Szpruch wrote:
> > Hi all,
> > Recently I have been asked about "Halogen free Solder Mask".
> > As I understand, "Halogen Free" restrictions on PCB are expexted to be
> > employed in summer 2007 ( ? ).
> > What are the definitions of "Halogen free" ???
> > I had impression,that definition is based on limit of % wt ( 0.1% ???)
> of
> > PCB. If this is true , taking into account amount of Solder mask on PCB
> and
> > possible % of halogens in Solder Mask formulations , it seems to me,
> that
> > such contributions of Halogens originated in Solder Mask is neglible.
> > Pls comment.
> > regards to all
> > Edward
> >
> > Edward Szpruch
> > Eltek Ltd
> > P.O.Box 159 ; 49101 Petah Tikva Israel
> > Tel ++972 3 9395050 , Fax ++972 3 9309581
> > e-mail [log in to unmask]
> > web site : www.eltekglobal.com
> >
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