TFT Array Substrate Layout for Water Vapor Isolation in Displays

The patent restores the vertical layering of metal layers that were collapsed into the same layer by mask reduction technology. By re-establishing multi-layer metal structures in the vertical dimension, the patent recovers the isolation capability while maintaining mask reduction benefits through selective patterning in the horizontal dimension.

The patent segments the metal layers into distinct vertical layers with buffer layers between them, separating functions that were previously combined. This segmentation restores the isolation effect by creating discrete metal layers that can be independently controlled and protected.

The patent moves metal layers from horizontal co-location to vertical stacking, using the vertical dimension to separate functions that mask reduction had combined in the horizontal plane. This dimensional transition restores isolation while managing process complexity through structured layering.

The patent implements a nested structure where metal layers are vertically stacked with buffer layers interspersed, creating a layered configuration similar to nested dolls. This nesting approach maintains compactness while restoring isolation functionality through vertical separation.

The patent compensates for reduced buffer layers by utilizing vertical stacking to create isolation paths through the thickness of the structure. The vertical arrangement provides additional isolation pathways that compensate for the reduction in lateral buffer layer coverage.

The patent employs composite material structures combining multiple metal layers with buffer layers in a vertically stacked configuration. This composite approach enhances isolation capability by creating a multi-material barrier system that is more effective than single-layer structures, even with fewer total buffer layers.