support structure and an electrical trace connecting the heater to a supply source the support structure accommodates the electrical trace through a via formed within it so as to form a solid state printhead containing all of the connections within and providing easily replaceable printhead application_number US 201113327745 A description application of oled material requires producing substantially flat oled layers on the substrate variation in thickness can result in undesirable outcomes and post manufacturing failures fig1 schematically shows a substrate supporting an oled film specifically fig1 shows substrate 100 having oled film 110 thereon as stated it is desired to deposit the oled film with a uniform thickness in the schematic representation of fig1 oled film 110 has a flat surface fig2 is a schematic representation of a conventional oled printhead the oled printhead 210 of fig2 is positioned over substrate 200 printhead 210 receives oled material 230 in liquid form in one embodiment oled material 230 is defined by solid oled particles which are suspended and or dissolved in a carrier liquid conventional carrier liquids include solvents that may have low vapor pressure printhead 210 may include one or more resistive heaters in fig2 resistive heaters 220 are shown on the distal surface of printhead 210 while the.