Hello Steve,
While I don't know the layer count of the board, we just built a very large
area stencil. The OD dimentions of the frame was 52" x 30.5", with a foil
size of 24" x 34". Aperture count in the neighborhood of ~18,000.
So the answer to your question is yes there are people building large
boards.
Frank Kurisu
SolderMask, Inc.
Huntington Beach, CA
----- Original Message -----
From: "Automatic digest processor" <[log in to unmask]>
To: "Recipients of TechNet digests" <[log in to unmask]>
Sent: Saturday, March 24, 2001 10:00 PM
Subject: TechNet Digest - 23 Mar 2001 to 24 Mar 2001 (#2001-178)
> There are 4 messages totalling 81 lines in this issue.
>
> Topics of the day:
>
> 1. HUGE SMT assembly... (3)
> 2. Cyclone copper filter for brushcleaner
>
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> ----------------------------------------------------------------------
>
> Date: Sat, 24 Mar 2001 22:27:39 +1100
> From: Peter tremewen <[log in to unmask]>
> Subject: Re: HUGE SMT assembly...
>
> "Stephen R. Gregory" wrote:
>
> > Hey ya'll,
> >
> > I just got a call from one of our sales people asking how big a board we
can
> > do in
> > our machines, I told her 18" X 16". She said; "Oh darn...". I asked why
the
> > disappointment? She said; "Well, there might have been some SMT business
that
> > we could get, but we would have to be able to handle a 24" X 24",
52-layer
> > board". As soon as I picked my jaw up from the floor, I told her that
there
> > was no-way we could do something like that.
> >
> > My question is; are there pick and place machines that can do boards
that big?
> >
> > -Steve Gregory-
>
> 24" X 24" Is a big board but understandable. However, the 52-layer has
my jaw dropping, Can
> you tell us what the purpous of such a high amount of layers is?? The most
I've ever seen is
> 12 layer, and though I far from know everthing I'm wondering why some one
would NEED that
> many. This is obviously VERY a specialist assembly.
>
> Peter T.
>
> ------------------------------
>
> Date: Sat, 24 Mar 2001 11:55:15 EST
> From: Jon Moore <[log in to unmask]>
> Subject: Re: HUGE SMT assembly...
>
> In a message dated 3/23/2001 5:24:22 PM US Eastern Standard Time,
> [log in to unmask] writes:
>
> << My question is; are there pick and place machines that can do boards
that
> big? >>
> Yes, I know of one made by Quad, and there are probably others.
>
> Jon Moore
>
> ------------------------------
>
> Date: Sat, 24 Mar 2001 11:48:13 -0600
> From: Earl Moon <[log in to unmask]>
> Subject: Re: HUGE SMT assembly...
>
> Well, you've really done it this time. I did 52 layer stuff that was half
> that size and 42 layer stuff 17x21 and one 60 layer that was 24x24 but
> through hole. Ain't it fun?
>
> For the 52 layer stuff, we did 1200 I/O devices as CCGA. For the 42, we
did
> 3400 I/O MCM's with some interesting twists. Did them on Universal and
> Siemens. Mydata used at HP had the big capability for 24x24.
>
> Don't know why I'm discussting this but it is interesting. You sure know
how
> to have fun.
>
> Any tornadoes yet,
>
> Earl Moon
>
> ------------------------------
>
> Date: Sat, 24 Mar 2001 17:53:43 -0600
> From: Maurice Colyer <[log in to unmask]>
> Subject: Cyclone copper filter for brushcleaner
>
> Been using a brush cleaner coupled to a cyclone copper filter for brushing
> boards for some years but the filter machine is now dying of old age. Does
> anyone know of any company still manufacturing these filter machines?
>
> ------------------------------
>
> End of TechNet Digest - 23 Mar 2001 to 24 Mar 2001 (#2001-178)
> **************************************************************
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