TECHNET Archives

November 2005

TechNet@IPC.ORG

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

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

Print Reply
Subject:
From:
John Maxwell <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, John Maxwell <[log in to unmask]>
Date:
Fri, 18 Nov 2005 14:40:35 -0800
Content-Type:
text/plain
Parts/Attachments:
text/plain (41 lines)
Vladimir:
Computer room or flooring have zinc whiskers due to galvanized steel
surfaces and if nothing disturbs the whisker it just waves in the wind.
Unfortunately when flooring is removed for new cables or maintenance,
these whiskers are broken off getting sucked up into rather large Ac-Dc
power supplies. It gets very exciting resulting in quite spectacular
displays when cm long whiskers a lite across gate drain leads of high
voltage MOSFETs being fed by hundreds of micro farads at 400V. One does
not need to be in a dark room when this occurs. An exciting exothermic
reaction is an understatement.

John Maxwell

>Joyce,
>
>I believe there is a video showing Sn whiskers swinging back and forth under something like a computer fan and almost non of them broke off.
>
>Vladimir
>
>Vladimir Igoshev, Ph. D.
>Senior Materials Researcher
>Research in Motion
>451 Phillip St.
>Waterloo, ON, N2L 3X2
>
>Voice: (+1) 519-888-7465, ext. 5283
>Fax: (+1) 519-886-0863
>E-mail: [log in to unmask]
>
>

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2