skilled artisans will recognize the examples provided herein have many useful alternatives and fall within the scope of embodiments of the invention fig1 illustrates a fingerprint sensing circuit 10 according to one embodiment of the invention the fingerprint sensing circuit 10 can have a two substrate architecture including a top substrate 12 and a bottom substrate 14 the top substrate 12 can be constructed of a flexible or rigid material suitable for applying a circuit thereon in one embodiment the top substrate 12 can be constructed of a flexible polyimide material such as kapton u00ae with a thickness of between about 5 and about 100 micrometers the bottom substrate 18 can be a conventional printed circuit board pcb fig2 and 3 illustrate the top substrate 12 the top substrate 12 can have a circuit side 16 as shown in fig2 and a sensing side 18 as shown in fig3 the circuit side 16 of the top substrate 12 can be attached to the bottom substrate 14 via a chip on flex cof process wire bonding anisotropic conductive film acf etc in some embodiments the fingerprint sensing circuit 10 can include an image sensor 20 to detect the ridges and valleys of a fingerprint as a finger moves across the image sensor.