Abstract: A system and method for creating desired splay patterned microelectrodes is disclosed. A bundle of microwires is arranged into a desired splay pattern. This may be performed mechanically with a rigid frame, electronically by charging the microwires, or with some other technique. The microwires in the desired splay pattern are then heated to release internal tension. Upon completion of heating, the microwires are then slowly cooled such that the splayed microwires will retain the desired splay pattern. Insulation may then be added to the microwires if the microwires are not already insulated.