Received: |
by ipc.org (Smail3.1.28.1 #2)
id m0uRgnh-0000CcC; Thu, 6 Jun 96 10:16 CDT |
Old-Return-Path: |
|
Date: |
Thu, 06 Jun 96 10:03:01 CST |
Precedence: |
list |
Resent-From: |
|
Resent-Sender: |
|
X-Status: |
|
Status: |
O |
X-Mailing-List: |
|
From [log in to unmask] Thu Jun 6 10: |
23:26 1996 |
TO: |
|
Return-Path: |
<TechNet-request> |
Resent-Message-ID: |
<"hWcI73.0.vC7.OPljn"@ipc> |
Subject: |
|
From: |
|
X-Loop: |
|
Message-Id: |
|
Parts/Attachments: |
|
|
Joe:
You are correct. The porosity of the gold plating is an
indication of the exposure of metallic layer under gold to normal
corrosive attach. The greater the porosity the greater the
corrosion of the underlying metal and the larger the possibility an
intermittent or open in the connector system. If you will
notice, the Bellcore Table 22 does not state that this as an
acceptable or unacceptable level, only as "Typical Pore Counts".
Neither do they comment on pore size nor shape. The main purpose
of the requirement to assure the plating process remains under
control and is monitored once a supplier establishes a porosity
"norm". The porosity requirements between a supplier and a
customer should be called out in the customer's specification and
negotiated with the supplier.
Harry
\\'''''//
(o o)
@----oOO---------(_)----------------@
| Harry O'Halloran |
| DSC Communications Corporation |
| 1000 Coit Road |
| Plano, TX 75075-5813 |
| Phone: (214) 519-3916 |
| [log in to unmask] |
@--------------------------oOO------@
| __ | __ |
| | | |
ooO Ooo
______________________________ Reply Separator _________________________________
Subject: gold finger porosity requirements
Author: [log in to unmask] at SMTPLINK
Date: 6/6/96 9:19 AM
Can any one educate me on Porosity requirements for gold fingers?
BELLCORE TR-NWT-000078 14.2.2.2 Table 22 calls out ranges of
acceptable Pore counts for given gold thicknesses. My question is
what is the purpose of pore requirements? Is the implication that if
the gold is to porous it is more susceptible to wear out and/or
corrosion? Any help would be appreciated.
Thank you
Joe Pudlo
|
|
|