Ian,
There is an industry standard that does define these terms, the IPC.
Look at IPC-T-50 "Terms and Definitions for Interconnecting and Packaging
Electronic Circuits"
PCB & PWB have in the past (old school) been interchangeable in meaning
Printed Circuit Board & Printed Wiring Board and generally mean the bare
fabricated board, as you said.
However IPC in T-50 does make a distinction between PCB & PWB a Printed
Wiring Board (PWB) as one that does not unclude Printed Components though,
and Printed Circuit Board (PCB) as one that can contain Printed Components.
It kinda makes sense wiring is just wiring and circuit includes parts.
PWA is the assembly using as one of its parts the PCB or PWB.
T-50 defines Printed Wiring Board Assembly
as An assembly that uses a printed wiring board for component mounting and
interconnecting purposes.
it also defines Printed Circuit Board Assembly
as An assembly that uses a printed circuit board for component mounting and
interconnecting purposes.
So I guess whether or not you define the bare board as a PCB or PWB depends
on whether you have a PCB assembly or a PWB assembly.
Hope this helps.
Bob
Robert M. Wolfe, C.I.D.
[EMAIL PROTECTED]

----- Original Message -----
From: "Ian Wilson" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, February 19, 2002 11:47 PM
Subject: [PEDA] What does "printed circuit board" mean to you?


> G'Day all,
>
> I was having an email discussion the recently...
>
> We use the term printed circuit board (or PCB) to describe the bare board
> (no components fitted) and the term printed wiring assembly (PWA) for the
> assembly (PCB + components).  Some of the younger colleagues around here
> are comfortable with PCB and "assembled PCB" as meaing the board and the
> board+components respectively.
>
> (One of the older school here use the term PWB (printed wiring board)
> interchangeably with PCB.  And PCA (printed wiring assembly)
> interchangeably with PWA.  No guessing which industry he came from...)
>
> How do others interpret the following terms?
> PCB (printed circuit board)
> PWA (printed wiring assembly)
>
> What term(s) do you use for the assembled PCB?
>
> Hooroo,
> Ian Wilson
>
> (Maybe the Topic Police will get cranky over this flagrant mis-use of
> electrons but we can move to the OT list if it gets out of hand.)
>
>

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