LSM and SDC powders were synthesized by glycine-nitrates technique and LSM-SDC composite porous films are deposited by means of spin-coating process using ethyl cellulose as pore-forming material. According to the surface morphology and microstructure of cathode films identified with scanning electron microscopy (SEM), as the content of ethyl cellulose in slurry was increased, the pore distribution in films becomes more uniform and the pore size is getting smaller. It was found that while the slurry contains 10 wt.% ethyl cellulose and 90 wt.% LSM-SDC composite powders, the cathode film has a fine structure, which has smooth surface without cracks, uniform pore distribution, suitable pore size and three-dimensioned interconnected structure. (C) 2007 Elsevier B.V. All rights reserved.