公开(公告)号：BRPI0716774A2

公开(公告)日：2013-09-17

申请号：BRPI0716774

申请日：2007-07-24

Applicant: MOTOROLA INC

Inventor： MANGAT PAWITTER S ,  D'URSO JOHN J ,  KORIPELLA CHOWDARY R ,  KRISHNAN RAMKUMAR

IPC: H01M8/10

Abstract: A method is provided for fabricating a fuel cell that requires only front side alignment techniques to fabricate gas access holes. The method comprises etching the front side of a substrate ( 12 ) to provide a channel ( 24, 26 ), and forming a pedestal ( 54, 88 ) on the front side of the substrate, wherein the pedestal ( 54, 88 ) comprises an anode side ( 56, 89 ) defining a fuel region ( 68, 102 ) aligned with the channel ( 24, 26 ). An electrolyte ( 46, 96 ) is positioned between the anode side ( 56, 89 ) and a cathode side ( 58, 90 ), and the fuel region ( 68, 102 ) is capped with an insulator ( 66, 98 ). A portion of the substrate ( 12 ) is removed from a back side to expose the channel ( 24, 26 ).

公开(公告)号：BRPI0708345A2

公开(公告)日：2011-05-24

申请号：BRPI0708345

申请日：2007-01-29

Applicant: MOTOROLA INC

Inventor： D'URSO JOHN J ,  BAKER JEFFREY H ,  KORIPELLA CHOWDARY RAMESH

IPC: H01M8/02 ,  H01M4/88

Abstract: A micro fuel cell and method of forming such includes depositing multiple layers ( 22 ) of alternating metals over a substrate ( 12 ); etching at least one metal from the multiple layers ( 22 ) creating a void between the remaining layers; forming a plurality of pedestals ( 28 ) in the multiple layers ( 22 ), each pedestal ( 28 ) having a center anode ( 29 ) portion and a concentric cathode ( 31 ) portion separated by a concentric cavity ( 31 ); filling the concentric cavity ( 31 ) with an electrolyte; and capping the center anode ( 29 ) portion and the concentric cavity ( 31 ).