Low temperature cofired ceramics (LTCC) is becoming more integrated as ceramic microsystems. Microsystems allow the integration of numerous components, including embedded passives, high-density interconnects, highperformance thermal management systems, sensors and actuators, mechanical, fluidic, and optical components. The development of these systems have led to enhanced processing capabilities including enhanced properties by controlled sintering or the development of cavities and microelectromechanical structures using fugitive inserts which are removed during firing. LTCC devices have produced meso and macroscale channels, large volume cavities, microcavities, wick, and controlled porosity structures. LTCC has been used to fabricate the cavities and channels required in a direct methanol fuel cell (DMFC), using an externally attached membrane electrode assembly (MEA) which consists of a carbon matte anode with a platinum catalyst, a Nafion® proton exchange membrane (PEM) and a platinum/ruthenium cathode.