Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: JanRwl@...
To: Homebrew_PCBs@yahoogroups.com
Sent: Friday, May 23, 2003 6:33 PM
Subject: Re: [Homebrew_PCBs] Membrane-switch material/process on PCB's


In a message dated 5/23/2003 3:21:22 AM Central Standard Time,
cobra_neil@... writes:

> There is a special type of material that is used on PCB's for
> membrane-switch
> contacts.

Neil: The only such stuff I am aware of is "conductive rubber" which the
membrane presses onto GOLD-plated contacts on the PCB. These are usually several
interwoven "fingers" so that even a small % of contact by the rubber
"plunger" causes a "make".

I've also seen screen printed conductive ink on the pcb. The gold plating with conductive rubber seems to be a better solution, but perhaps someone else can expand the discussion. Maybe its a cost issue?
Ron

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