In　this　paper,　we　report　the　improvement　of　PCR　microfluidic　chip　efficiency　achieved　by　coating　the　inner　surface　of　steel　capillary　microchannel　with　a　22-A　mu　m　film　of　the　ultraviolet-solidified　NOA61　using　a　device　invented　by　us.　Our　results　indicate　that　with　this　treatment,　the　roughness　of　the　inside　wall　of　steel　capillary　was　improved　from　Ra　=　0.921　to　Ra　=　0.254.　The　contact　angle　was　decreased　from　about　95A　degrees　to　56A　degrees,　and　the　surface　hydrophobicity　was　also　increased.　The　flow　pressure　for　performing　the　real-time　PCR　in　the　microfluidic　chip　with　modified　surface　was　reduced　by　twofold　(2.11/1)　and　that　resulted　in　a　substantially　increased　efficiency　of　PCR.　A　modification　of　the　microchannel　interior　surface　improved　the　quality　of　the　on-chip　integrated　PCR　procedure.