TECHNET Archives

1996

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Condense Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Mime-Version:
1.0
Content-Type:
text/plain; charset="us-ascii"
Old-Return-Path:
Date:
Mon, 21 Oct 1996 14:13:00 -0500
Precedence:
list
Resent-From:
Resent-Sender:
TechNet-request [log in to unmask]
Content-Transfer-Encoding:
7bit
Status:
O
X-Mailing-List:
<[log in to unmask]> archive/latest/7043
From [log in to unmask] Wed Oct 23 15:
05:55 1996
TO:
"'TechNet'" <[log in to unmask]>
Return-Path:
<TechNet-request>
X-Status:
Resent-Message-ID:
<"hIu9N2.0.2gJ.OD-Qo"@ipc>
Subject:
From:
Mike Matson <[log in to unmask]>
X-Loop:
Received:
by ipc.org (Smail3.1.28.1 #2) id m0vFRO9-0000VOC; Mon, 21 Oct 96 15:55 CDT
X-Mailer:
Microsoft Exchange Server Internet Mail Connector Version 4.0.993.5
Message-Id:
Parts/Attachments:
text/plain (68 lines)
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
[log in to unmask]

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to:           *
* [log in to unmask] with <subject: unsubscribe> and no text.        *
***************************************************************************



ATOM RSS1 RSS2