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

If it just the glass you're connecting to, I have used a heatseal flex,
which I adhere to the glass with a soldering iron heating a thin metal bar
(a piece of the stainless steel stiffener in a windscreen wiper blade is
about right for the soldering iron I use).
I used it to repair calculator, meters and phone displays.

Your spacing is not an issue, just use some 1mm heatseal and cut it on a
diagonal. It won't take much of an angle to get the correct alignment.

The joint is fragile, and has a tendency to peel away if there is any
tension on it. I find it is best supported by a piece of foam, clamped in
place to the LCD bezel.

(The stuff I have was a sample I got years ago from Shin-Etsu in Japan.)

Bruce

From: javaguy11111
Sent: Tuesday, 13 July 2010 10:45 PM

What started me looking at this is that I bought a PSOC5 developer board for
testing and wanted to hook up an LCD display to it. Sparkfun had some Nokia
displays for 2.95 that I wanted to use. The problem is that they have no
connectors. Just bare ITO traces, which have an oddball spacing of 1.15mm.

The next issue is to figure out how to bond the connector to the ITO.
3M sells an anisotropic conductive adhesive, but they charge several hundred
dollars for a hundred feet. Mechanical would be another option, but I just
do not like that in this case.

My thought is to make my own anisotropic conductive using powder coating
paint mixed with some conductive powder such as graphite or copper. A
combination of heat and pressure would bond the flex connector to the ITO
and conductive particles would be trapped between the copper and ITO
connectors. Another experiment to perform.

In the mean time, since I just want to play with my LCD and PSOC5 board and
not get sidetracked on other things, I am going the silver epoxy route to
attach the wires to the ITO.

I will do some more experimenting with flex cables and bonding at some point
in the future.





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