A method of manufacturing an end effector assembly including first and second energizable portions (204,208) configured to supply energy to tissue, the method comprising: forming a substrate including first and second substrate portions (204,208) interconnected by a connector portion, the substrate formed as a single integrated component, wherein the substrate includes: in top view a generally U-shaped outer engagement flange defining first and second side portions (203a,203b) interconnected by an arc-shaped portion; a generally U-shaped tissue-contacting segment providing the said first substrate portion and extending inwardly from the outer engagement flange and defining first and second side portions (205a,205b) interconnected by an arc-shaped portion; and a central member providing the said second substrate portion, wherein the central member defines an inner engagement flange extending therefrom; engaging the substrate with an insulative member; and removing the connector portion of the substrate to electrically insulate the first and second substrate portions from one another; characterized in that: in top view the connector portion is generally U-shaped and extends inwardly from the tissue-contacting segment, the connector portion defining first and second side portions (207a,207b) interconnected by an arc-shaped portion, the central member of the substrate being disposed between the first and second side portions (207a,207b) and the arc-shaped portion of the connector; and the method further comprises the step of perforating the substrate where each of the first and second substrate portions (204,208) meet the connector portion to facilitate removal of the generally U-shaped connector portion. forming a substrate including first and second substrate portions (204,208) interconnected by a connector portion, the substrate formed as a single integrated component, wherein the substrate includes: in top view a generally U-shaped outer engagement flange defining first and second side portions (203a,203b) interconnected by an arc-shaped portion; a generally U-shaped tissue-contacting segment providing the said first substrate portion and extending inwardly from the outer engagement flange and defining first and second side portions (205a,205b) interconnected by an arc-shaped portion; and a central member providing the said second substrate portion, wherein the central member defines an inner engagement flange extending therefrom; engaging the substrate with an insulative member; and removing the connector portion of the substrate to electrically insulate the first and second substrate portions from one another; characterized in that: in top view the connector portion is generally U-shaped and extends inwardly from the tissue-contacting segment, the connector portion defining first and second side portions (207a,207b) interconnected by an arc-shaped portion, the central member of the substrate being disposed between the first and second side portions (207a,207b) and the arc-shaped portion of the connector; and the method further comprises the step of perforating the substrate where each of the first and second substrate portions (204,208) meet the connector portion to facilitate removal of the generally U-shaped connector portion. in top view the connector portion is generally U-shaped and extends inwardly from the tissue-contacting segment, the connector portion defining first and second side portions (207a,207b) interconnected by an arc-shaped portion, the central member of the substrate being disposed between the first and second side portions (207a,207b) and the arc-shaped portion of the connector; and the method further comprises the step of perforating the substrate where each of the first and second substrate portions (204,208) meet the connector portion to facilitate removal of the generally U-shaped connector portion.