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April 1998

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From:
JoAnn Amerson <[log in to unmask]>
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Date:
Wed, 8 Apr 1998 16:10:22 +0000
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> I need some very basic info on things that everyone here seems to know about.
> I'm feeling a little insecure (OK fine, I feel stupid asking but I don't know
> and want too)

Brian - Don't feel insecure.  I'm still learning alot of this stuff
myself.  I know what you mean by feeling stupid but everyone here
has treated with with respect and that is what beginners like us
need.  :-)

> What are Ball Grid Arrays, do they replace IC's? Is it more
> expensive that other compatable parts.....will it drive up price if I use
> them. Are they only used for certain app.'s

I know it's a type of packaging that can be difficult to route and
expensive to use - and we don't use them here.

> I know it's alot of questions,

Me too!

>also what actually is a blind or buried via. Is
> a buried via for internal layers only?

Yep, a blind via is one that doesn't go the whole way thru a board.
It ends on an internal layer.  A buried via is between two internal
layers only.  We don't use those either.

Should we take turns asking basic questions?  Or flip a coin?
Seriously, get a subscription to PCD magazine.  That is such a
wonderful source for information and alot of it is written that we
can at least get the gist of it.  Besides, Pete Waddell's "Back Page"
is a must-read!  I read it first *then* the rest of the issue.

JoAnn L. Amerson
Design Librarian
Red Lion Controls, Inc.
E-mail: [log in to unmask]
Voice: (717) 767-6961 ext 6308

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