are you using polymeric material that not meet the spec extractable ionics
level for the assembly? oh, no answer required.
jk
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Dehoyos, Ramon
Sent: Tuesday, February 01, 2005 10:40 AM
To: [log in to unmask]
Subject: Re: [TN] Sulfide contamination
Now that the subject is sulfate, in a previous life there
were several boards that used polysulfides glues to liquid seal or
mechanical stabilize tall components. So how is it that sulfate can be
detrimental to components? Is it the source from unstable sulfur? This
sulfides were added after the board was fully populated and they were heat
cure or UV light cure.
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Joyce Koo
Sent: Tuesday, February 01, 2005 9:44 AM
To:
Subject: Re: [TN] Sulfide contamination
hmm, interesting... are you taking your cell phone for mineral bath.. very
healthy.
jk
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ingemar Hernefjord
(KC/EMW)
Sent: Tuesday, February 01, 2005 3:41 AM
To: [log in to unmask]
Subject: Re: [TN] Sulfide contamination
I've been on top of Mt Aetna twice, when she was calm. I liked the smell
from the old lady, far from wrotten eggs..
besides this, can epoxies contain sulphuric compounds in any form? The
material declarations I use to
see, don't mention sulphur or sulfides or anything S-like. I've seen some
silver migration and corrosion around chips that were epoxied, also seen
with some bleedout, and just wondered what mobile ions could play on that
arena.
Ingemar
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Brian Ellis
Sent: den 1 februari 2005 09:29
To: [log in to unmask]
Subject: Re: [TN] Sulfide contamination
Oh, and I forgot to mention to make sure you are not leeward, within
3000 km, of a volcano :-)
Brian
Lothar Thole wrote:
> I have heard that certain plastic trays, pallets, antistatic sheets,
tapes,
> etc. could contain sulfide as a plasticiser, which could lead to sulfide
> contamination of components coming into contact with these items. Is this
a
> fact? Is sulfide contamination a risk if there is no brown paper or
> cardboard involved?
>
> Lothar Thole
> Product Engineering Manager
> Vision Systems
>
> 14 Park Way
> Technology Park
> MAWSON LAKES SA 5095
> AUSTRALIA.
>
>
>
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