Display Panel Vernier Alignment for Flexible Circuit Bonding

The vernier mark structure is pre-designed with extension patterns that extend beyond the pad boundaries. This preliminary configuration allows the alignment reference to be available before the actual bonding process, enabling precise alignment to be achieved during assembly without requiring post-bonding adjustments.

The vernier mark serves as an intermediary alignment reference between the display panel and flexible circuit film. By introducing this intermediate reference element with extension patterns, the direct alignment problem between pads and leads is mediated through a more robust reference structure that is less sensitive to positioning errors.

The vernier mark extension patterns extend in multiple directions (first direction parallel to first pad, second direction parallel to second pad) from the same reference point. This dimensional expansion of the alignment reference allows alignment to be verified and adjusted in multiple orientations, making the alignment process easier despite the spaced-apart configuration of pads.

The vernier mark is segmented into multiple extension patterns (first extension pattern, second extension pattern, third extension pattern) that correspond to different pads. Each extension pattern provides a dedicated alignment reference for its corresponding pad, making it easier to align each individual pad-lead pair independently while maintaining overall flexibility.