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From: brown@vidiot.UUCP (Vidiot)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Layered M/B ?
Message-ID: <509@vidiot.UUCP>
Date: 5 Jun 90 03:27:19 GMT
References: <6761@ucrmath.ucr.edu>
Reply-To: brown@vidiot.UUCP (Vidiot)
Organization: Vidiot's Hangout
Lines: 16

In article <6761@ucrmath.ucr.edu> lulu@ucrmath.UUCP (david lu) writes:
<What does it mean for a motherboard to be "layered"?
<I've seen ads for 4-layered motherboards, so I assume
<that other n-layered motherboards also exist.

When you look at a circuit board, you normally see the etched runs that make
up the circuit traces.  The two sides that you can see are called layers.
Every double-sided board is considered as having two layers.  A four layer
board has two more layers inside the board.  Consider it as a sandwich.
A four layer board will have three pieces of board glued together.  A four
layer board normally has the signal traces on the outside layers and power
and ground traces in the inner two layers.
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