1. A flexible conductor track for connecting first and second electronic modules, wherein the second electronic module includes a circuit board, and wherein the flexible conductor track comprises:conductor track structures,
first and second connecting regions configured to electrically connect the conductor track structures to corresponding conductor tracks of the first and second electronic modules, wherein the conductor track structures extend from the first connecting region to the second connecting region,
at least one long slit disposed in a region in the flexible conductor track located between the first and second connecting regions, and
an optical alignment inspection window disposed in the second connecting region,
wherein the second connecting region is configured to be connected to a connecting area of the second electronic module by anisotropic conductive film adhesive bonding, and
wherein the optical alignment inspection window is configured and located to cooperate and align with a via of the circuit board of the second electronic module to optically align the second connecting region with the connecting area of the second electronic module.