Making a multitouch capacitive touch screen

Hello, I just need some advices.
I'd like to make a capacitive multi-touch screen. I would like to create it my-self.
I would like to create it from wires (min 48 * 48)
I know the following topic has already been discussed here: Making a capacitive multi-touch screen
But I have no idea what kind of chip to use, and how to run it. Any idea?

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