We describe the fabrication and characterization of ridge structure on Z-cut LiNbO3 substrates. Titanium strip patterns are formed using conventional photolithography and are used as a mask. The unmasked portions are then proton exchanged. As proton-exchanged LiNbO3 have a much higher etch rate than bulk LiNbO3, these portions are etched away easily by a suitable etchant, leaving a ridge structure along the masked portion. Different characterizations have been done both before and after annealing the proton exchanged areas. These ridge structures can be used for making broadband modulators.