Chris,
I for one am interested in press releases such as this. Although more
marketing than technical it gives us insight. It also raises these
questions:
1. What is the reflow profile (max temp) look like for a 'zinc' solder?
Anyone know?
2. What is NEC doing for Pb-free components on the PC mother board. I have
seen several of these announcements on various web locations in the last
year (both in Japan and Europe) but they never make mention of what they are
doing about the components. It's almost as if the Pb in the component
finishes are ignored. You can't have a truly Pb-free solder joint or system
if the component still has Pb in the finish.
These press releases usually tout 'first in the industry' but leave out
important technical details. Does anyone have further insight into NEC's
claims?
Best regards,
Doug Romm
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Chris Jorgensen
Sent: Friday, September 24, 1999 10:32 AM
To: [log in to unmask]
Subject: [LF] NEC Corp. Announcement
I thought you would be interested in the announcement that crossed my desk
this morning.
Chris Jorgensen
IPC
+++++++++++++++++++++++++++++++++++
NEC Corp. has succeeded in mounting microchips on a PC mother board with
unleaded solder, the first firm in the world to do so, company sources
said Wednesday. The communications equipment and computer maker will use
the technology on notebook PCs from this autumn and plans by the end of
March 2002 to stop using lead to solder chips on mother boards for all
notebook computers produced in Japan.
The new method was developed in anticipation of the European Commission's
intention to regulate lead use in electric appliances, the sources said.
The new process of soldering, which is carried out at the same temperature
as the old one, replaces the lead solder with zinc. Nonlead solder has,
until now, been used for mounting electronic parts that are highly heat-
resistant. But, such solder was not previously used for mounting key
parts on a mother board because the components are too sensitive to heat,
the sources added.
SOURCE: Nikkei English News via NewsEdge Corporation
DATE: Thursday, September 23, 1999
(The Nihon Keizai Shimbun Thursday edition)
<<Nihon Keizai Shimbun, Inc. -- 09-22-99>>
[09-22-99 at 15:17 EDT, Copyright 1999, Nihon Keizai Shimbun, Inc., File:
n0922095.202]
Copyright notice
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