A semiconductor structure (100) includes a substrate (110) having a first surface (111) with a mold lock feature (101). The semiconductor structure also includes a semiconductor chip (120) located over the first surface of the substrate. The semiconductor structure further includes an electrical isolator structure (340) located over the first surface of the substrate. The electrical isolator structure includes an electrical lead (341, 342) and an electrically insulative element (343) molded to the electrical lead. An optional portion (444) of the electrical isolator structure is located in the mold lock feature. The semiconductor structure additionally includes an adhesive element (450) located between and coupling the electrical isolator structure and the first surface of the substrate.