Sender: |
|
Subject: |
|
From: |
|
Date: |
Mon, 23 Mar 1998 09:13:19 -0800 |
In-Reply-To: |
|
X-To: |
|
Reply-To: |
|
Parts/Attachments: |
|
|
The gold flash spec is usually from your vendors capability. However
as noted in a report published in the proceedings from the IPC Summit
on Surface Finishes and Solderability, Sep. 97, For solderability
reasons the minimum should never go below 3 microinch. Each
application should be tested independently to make sure this is an
adequate thickness for whatever application it is going into. The
thinner the gold the easier it is wiped off and in addition the more
pores it will have making it more susceptible to oxidation of the
nickel barrier under the gold. Flash gold pores are not specified
they are there and there are usually too many to count. Once again
check with your supplier on expected hardness and gold purity of the
plating.
Regards:
Steve O'Hara HP
______________________________ Reply Separator _________________________________
Subject: Re: [TN] : FAB: Flash Gold
Author: Non-HP-MYuen ([log in to unmask]) at HP-Vancouver,uugw10
Date: 3/23/98 6:13 AM
IPC-D-275 Section 3.8.4.3.
Hope that helps
Michael Yuen
----------
From: Poh Kong Hui
To: [log in to unmask]
Subject: Re: [TN] : FAB: Flash Gold
Date: Monday, March 23, 1998 8:45AM
Hi Technetters,
Could someone can advise me on what standard (such as IPC) to use for the
requirement of Gold flash PCB, such as gold min/max thickness, surface
porosity, hardness, and etc.
Thks in Advance.
Poh
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following
text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional
information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or
847-509-9700 ext.311
################################################################
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################
|
|
|