Sorry for pingpong back, Bev, but phosphorous compounds and aluminum
hydroxide sounds weird to me. The later is very harsh to solders (if free).
Most P compounds are causing leakage currrents and other disorders. Is it
red P. I'm not a chemist like you, so I cannot understand how two of the
worst enemies to electronics can be mixed into the epoxy resin.
Inge
--------------------------------------------------
From: "Bev Christian" <[log in to unmask]>
Sent: den 9 May 2010 22:29
To: <[log in to unmask]>
Subject: Re: [TN] Dealing with the tech question
> Inge,
> All the major board manufacturers can supply halogen free boards. They
> add phosphorus compounds and aluminum hydroxide as flame retardants.
> But the latter starts to decompose at reflow temperatures, so personally
> I think this is crazy, but they do it because it is cheap. I don't
> think much of the current crop of halogen free board materials, as I
> said - too brittle.
> Bev
>
> -----Original Message-----
> From: Inge [mailto:[log in to unmask]]
> Sent: Sunday, May 09, 2010 4:26 PM
> To: Bev Christian; [log in to unmask]
> Subject: Re: [TN] Dealing with the tech question
>
> 0.3 pitch, that's ain't easy
>
> Halogen free? How's that possible? How do you cure epoxy without hanging
> on
> those brom xxx moleculls? And Brom is used as a flame retardant. Have I
> been
> sleeping. Where can you buy such boards? I have obviously missed
> something
> very important, despite I try to keep informed.
>
> Inge
>
> --------------------------------------------------
> From: "Bev Christian" <[log in to unmask]>
> Sent: den 9 May 2010 21:09
> To: <[log in to unmask]>
> Subject: [TN] Dealing with the tech question
>
>> Inge,
>> Not sure if you are talking about a captive board house or one that
>> sells outside. Here is a list to consider:
>> 0105s
>> 0.3 mm pitch
>> embedded components
>> halogen free boards that aren't brittle like your Grandma's china.
>>
>> Bev
>>
>>
>> -----Original Message-----
>> From: Inge [mailto:[log in to unmask]]
>> Sent: Sunday, May 09, 2010 2:02 PM
>> To: Bev Christian; [log in to unmask]
>> Subject: Re: [TN] Earl Moon...
>>
>> Bev,
>> I did not swing a tomahawk! Just expressed my sadness over this old
>> man.
>> What you say is probably right, because you have better insight. Can't
>> help
>> I felt upset when I happened to get a hit on SMT searching for very
> fine
>>
>> pitch boards, which I'm very interested in. I didn't look back to see
>> what
>> the SMTA conversation was about, maybe Earl had gone little too far.
>> Moreover, Earl had nothing but good things to say about you, nor have
> I.
>>
>> That's why I said 'we' . Still, I felt so sorry when I heard about
>> Earl's
>> loneliness and broken economy.....OK, maybe his choice, as you say.
>> Now,
>> let's return to technical topics....e.g. Ibiden, which I just read
>> about.
>> As far as I could see, they do not have any superior technology or
>> secrets
>> that make them 'world's largest PWB manufacturer, as they say
>> themselves.
>> They are just very big. And they go on being bigger, building a new
>> superplant for some 1,000 workers. We are small in comparison, and we
>> have
>> a down just now as many others, that' s why I do some surveying. My
> boss
>>
>> asked me if I had any good ideas for our PWB section.
>>
>> Inge
>>
>> --------------------------------------------------
>> From: "Bev Christian" <[log in to unmask]>
>> Sent: den 9 May 2010 19:26
>> To: <[log in to unmask]>
>> Subject: Re: [TN] Earl Moon...
>>
>>> No, Inge. I fundamentally disagree with what you have just said. No
>> one
>>> chased him out - not us, not Jack Crawford, not the IPC. Earl made a
>>> CHOICE. Fortunately we have the freedom in the respective countries
> of
>>
>>> most TechNetters to do that, but with choice comes CONSEQUENCES. If
>>> someone wants to be a cowboy (and there is no denying that Earl
> wasn't
>> -
>>> but he was a very good one though :) ) things logically fall from
>> that.
>>> Earl knew that and I think you do too. So please don't lay something
>> at my
>>> doorstep I don't own.
>>>
>>> Your friend (even if we continue to disagree on this)
>>> Bev
>>>
>>> ----- Original Message -----
>>> From: TechNet <[log in to unmask]>
>>> To: [log in to unmask] <[log in to unmask]>
>>> Sent: Sun May 09 12:27:28 2010
>>> Subject: Re: [TN] Earl Moon...
>>>
>>> Steven.
>>>
>>> I feel a little sad still. We chased Earl out from this forum.
>> Obviously,
>>> he
>>> tried to find a new "home" with this result :
>>>
>>
> ------------------------------------------------------------------------
>> --------------------------------------------------------------
>>> Date: July 13, 2006 08:12 PM
>>> Author: pr
>>> Subject: Earl Moon
>>> Earl if you dont have anyting of value to add to the forum please say
>> your
>>> final farewell and never returrn
>>>
>>> (http://www.smtnet.com/Forums/index.cfm?CFApp=1&Message_ID=42721)
>>>
>>
> ------------------------------------------------------------------------
>> ---------------------------------------------------------------
>>>
>>> I hope we will never ever treat someone in this forum like that, with
>>> exception for evilness and sabotage or other destructive behaviour.
>>>
>>> Inge
>>>
>>>
>>> --------------------------------------------------
>>> From: "Steven Creswick" <[log in to unmask]>
>>> Sent: den 9 May 2010 16:09
>>> To: <[log in to unmask]>
>>> Subject: Re: [TN] Earl Moon...
>>>
>>>> All,
>>>>
>>>> None of us wears the crown of perfection!
>>>>
>>>> I believe that Earl, having been an active and valuable participant
>> in
>>>> the
>>>> IPC forums for a number of years, deserves to have his picture
>>>> memorialized
>>>> on Steve's page.
>>>>
>>>> Bottom line is that it IS Steve's page [not the IPC's], and he can
> do
>> as
>>>> he
>>>> pleases ....
>>>>
>>>>
>>>> We just have to come up with a picture...
>>>>
>>>>
>>>> Steve Creswick
>>>> http://www.linkedin.com/in/stevencreswick
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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