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| From: | |
| Reply To: | (Leadfree Electronics Assembly Forum) |
| Date: | Wed, 25 May 2005 09:00:25 +0200 |
| Content-Type: | text/plain |
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Tin-lead is used as etch resist for alkaline etching of pattern plated
PCB.After etching is stripped out.Completly.
No left-overs.What does this process has in common with RoHS ??? There is NO
lead on the PCB.
The same is applied, for example, to Cyanide. ENIG finishing is involved in
dipping the board in Cyanide containig Gold solution.Very toxic and very
powerfull poison.
Anyone is considering ban on ENIG finishing ???
Edward
> -----Original Message-----
> From: MA/NY DDave [SMTP:[log in to unmask]]
> Sent: ד מאי 25 2005 7:19
> To: [log in to unmask]
> Subject: Re: [LF] Pb Sn Stripped PCB and Rohs
>
> Hi Roger, Mike, IPC LF Listservers,
>
> Thanks,
>
> I don't know all of the other EU Directives, particularly for those living
> and working in the EU production industries. My expectation is that since
> the EU is coming after lead in electrical and electronic equipment they
> have already or will go after lead in the process and manufacturing
> industries when a replacement process exists.
>
> Considering the date associated with the Whereas. That is some meeting or
> resolution on 30Jul96 or 1996.07.30 my thought was that there should
> already be on the books other directives limiting lead. I don't know yet
> hope MikeF, and I believe Roger who live in the EU, are correct that this
> isn't legislated yet in the EU.
>
> Why isn't this process of tin lead as an etch resist, and then later
> completely stripped rather than reflowed for superbe long term storage and
> solderability, on a replacement list?
>
>
> Yours in Engineering, Dave
> YiEngr, MA/NY DDave
>
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