Electrochromic Device Scribe Structure Reduces Leakage

The patent applies segmentation by dividing the scribe structure into multiple discrete channels separated by ridges. Instead of a single wide scribe, the lower transparent conductive layer is segmented into multiple segments with intervening ridges between them. This segmentation prevents ion migration while maintaining manufacturability, as each channel can be processed independently and the ridges provide natural barriers to ion diffusion paths.

The patent introduces a third dimension by creating raised ridges between the scribe channels. Rather than simply increasing the two-dimensional scribe width, the solution adds vertical dimension with ridges that extend upward from the substrate. This dimensional change provides effective ion blocking without proportionally increasing the horizontal footprint or laser processing complexity, as the ridges can be formed through controlled deposition or etching processes.

The patent merges multiple deposition steps into a single continuous vacuum process. All layers including the lower transparent conductive layer, electrochromic layers, ion conductor layers, and upper transparent conductive layer are deposited without breaking vacuum. This combining of steps eliminates dust contamination from vacuum cycling while maintaining manufacturing precision through controlled in-situ deposition processes and laser scribing performed within the same vacuum environment.

The patent ensures continuity of the deposition action by maintaining vacuum throughout the entire manufacturing process. The useful action of layer deposition continues uninterrupted without vacuum breaks, and laser scribing operations are performed continuously within the vacuum chamber. This continuous process eliminates the start-stop nature of multiple vacuum cycles, preventing dust contamination and improving yield while maintaining the precision required for functional layers.

The patent applies local quality by concentrating laser processing only in specific localized regions where scribing is needed, rather than processing the entire device uniformly. The laser creates precise isolation channels and ridges only at the busbar regions and between conductive segments, leaving the functional electrochromic areas untouched. This localized approach reduces overall processing difficulty and time while maintaining effective electronic leakage prevention at critical locations.

The patent introduces ridges as intermediary structures between the scribe channels. These ridges act as mediators that provide ion blocking functionality without requiring deep or wide scribes. The ridges can be formed through controlled material deposition or partial etching, serving as intermediate structures that simplify the laser processing requirements compared to creating deep isolation channels, while still effectively preventing ion migration and electronic leakage.