Thermally Protected MOV Structure for TCO Isolation Reliability

A barrier layer made of metal foil is introduced as an intermediary component between the electrode and the encapsulant. This barrier layer prevents direct contact between molten solder and the encapsulant, thereby eliminating the fire hazard while maintaining the thermal protection function of the TCO wire. The barrier layer acts as a physical mediator that isolates harmful interactions.

The encapsulant is divided into multiple segments by the barrier layer, creating isolated regions. This segmentation prevents the continuous flow of molten solder across the encapsulant surface, thereby preventing reconnection of the TCO wire and eliminating the fire hazard while maintaining thermal protection.

The barrier layer serves as a thermal intermediary between the MOV body and the encapsulant. It provides thermal isolation that prevents excessive heat from the MOV body during high power transient events from directly heating and burning the encapsulant, while still allowing the MOV to dissipate the required transient energy.

The barrier layer is pre-installed between the electrode and encapsulant to provide advance thermal protection. This cushioning layer absorbs and distributes thermal energy before it can reach the encapsulant, preventing burning during overvoltage events while maintaining the MOV's power dissipation capability.

The barrier layer acts as a physical intermediary that prevents molten TCO wire segments from recontacting each other. By introducing this intermediate barrier, the system maintains circuit isolation reliability while eliminating the fire hazard associated with random reconnection.

The barrier layer introduces a new spatial dimension (a physical barrier plane) between the electrode and encapsulant surfaces. This dimensional addition prevents the three-dimensional random flow and reconnection of molten solder, thereby maintaining circuit isolation while preventing fire hazards.