Good comment Bill.
I concur with the reliability limitations regarding eyelets in service environs. The use of "C" or "Z" wires provided improved performance when soldered correctly.
Mel Parrish
STI Electronics Inc.
102 Tribble Drive
Madison, AL 35758
256 705 5530
256 461 9566 Fax
[log in to unmask]
www.stielectronicsinc.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Brooks,Bill
Sent: Thursday, September 22, 2005 11:05 AM
To: [log in to unmask]
Subject: Re: [TN] Eyelet
Thanks to JaMi Smith, for educating me on the history behind eyelet use in
PCB's awhile back... I used to have to install them in PCB's when I was a
kid in High school, my Dad owned a PCB manufacturing business in the late
sixties and early seventies.
JaMi's history of the eyelet is available online in the Designers Council
list archive...
http://listserv.ipc.org/scripts/wa.exe?A2=ind0401&L=designercouncil&T=0&F=&S
=&P=9373
There are still some manufacturers of eyelets out there but not many people
are using them the way we did back in the late 1960's... They were used as a
way to connect top traces to bottom traces much like the plated thru holes
are now, however they were very unreliable and after plated through holes
became more common, the use of eyelets faded away.
http://www.stimpson.com/funnel_flange.htm
http://www.swrivet.com/products/eyelet_machines/index.html
Best regards,
Bill Brooks - KG6VVP
PCB Design Engineer, C.I.D.+, C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
Datron World Communications, Inc.
_______________________________________
San Diego Chapter of the IPC Designers Council
Communications Officer, Web Manager
http://dcchapters.ipc.org/SanDiego/
http://pcbwizards.com
-----Original Message-----
From: Steve Hodge [mailto:[log in to unmask]]
Sent: Thursday, September 22, 2005 6:09 AM
To: [log in to unmask]
Subject: Re: [TN] <List>[TN] Eyelet
Before electroless copper, they were used to connect one side of a circuit
board to the other. They come in various sizes and are swaged using a small
press and anvil. Kind of dating myself here I guess, but I remeber doing
this back in the late 60s. They can be used today as a repair connection on
missing and unplated holes that need to be plated.
At 06:49 AM 09/22/2005, you wrote:
>Dear All,
>
> what is called eyelet ?? and where does it use ?
>
>Thanks and Regards
>
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