Electrical stimulation of the remaining retinal neurons to restore useful vision is recently proposed in patients with retinitis pigmentosa or macular degeneration.Using the potentials of microsystem technology

neural prosthesis become feasible which are implanted in the eyes.The active microimplants demand a high degree of device miniaturization without compromising design flexibility and biocompatibility requirements.Experimental verification is made through analogue emulation.In order to overcome the brittleness of silicon

a kind of light-weight and highly flexible Polyimide-based device is proposed.Results are given on the material selection for substrate materials and the design for flexible stimulation devices.Polyimide is used as substrate and insulation layers

silicone and Parylene-C as coating materials

and gold as electrode material.