I need to develop an electrode plate that can transmit the impuses generated by a device to the brain when kept on our sensory organs like tongue,fingre tips.Does any one know how to make such electrode plate?Is any such kind of electrode plate is available in market?Do help people.

 

Have you tried googling for 'medical electrodes'?
We don't know what your 'device' is, but be aware that applying voltages to the human body can be dangerous if more than a few mA flows in certain parts of the body interior.