The　dielectric　films,　to　be　used　in　fabrication　of　field　emission　display,　were　deposited　by　screen　printing　on　glass　substrates.　The　impacts　of　sample　preparation,　including　the　sintering　conditions,　numbers　of　screen-printing　and　sintering　times,　and　film　thickness,　on　its　insulation　property　was　studied.　The　microstructures　of　the　films　were　characterized　with　scanning　electron　microscopy　and　conventional　surface　probes.　The　results　show　that　the　repeated　sintering　significantly　improves　the　insulation　property.　For　instance,　when　films　were　sintered　twice　in　two　different　stages,　the　breakdown　voltage　of　a　34　μm　thick　films　was　found　to　be　421　V,　accompanied　by　negligible　leakage　current.　When　it　comes　to　the　conduction　mechanisms,　in　a　low　field,　Ohm＇s　law　works;whereas　in　a　high　field,　Schottky　emission　dominates.