Doug,
We use PWB for boards and PWA assemblies.

As I recall (and anyone can comment or add here), most of us called bare
boards "PCB"s until the mid 1970's when somebody discovered that
HORRIBLE stuff, Polychlorinated Biphenyls, or PCB's lurking in thousands
of transformers all over the country.  We as an industry disassociated
ourselves by calling our product PWB instead of PCB.

 ----------
From: Phillips, Peter (NM75)
To: TechNet-request; technet
Subject: RE: PWB and PCB???
Date: Monday, October 21, 1996 11:41AM


Doug,

ref: IPC-T-50  "Terms and Definitions for Interconnecting and Packaging
Electronic Circuits"

The normal industry practice of distinguishing between them is as
follows:

Printed Wiring Board - A printed board that provides point-to-point
connections, but not printed components, in a predetermined arrangement
on a
common base.

Printed Circuit Board - A printed board that provides both
point-to-point
connections and printed components in a predetermined arrangement on a
common base.

A PWB or a PCB with components mounted on it is commonly referred to as
a
 Printed Circuit Board Assembly (PCB Assembly), Printed Wiring Assembly
(PWA) or more recently as a Circuit Card Assembly (CCA).

 ----------
From: TechNet-request
To: technet
Subject: PWB and PCB???
Date: Monday, 21 October, 1996 11:22PM

Is there a difference between a
PWB - Printed Wiring board and
PCB - Printed Circuit Board
in the industry?

Is it safe to assume (uh-oh) the PWB is the bare board and
the PCB is the PCB w/components, i.e. a PCB assembly?

Does anyone out there make a strict division between the two this way?

*******************************************************
Doug McKean
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