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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