Display Panel Groove Layout for Residue-Free Touch Routing

The patent applies preliminary action by forming a filler layer in the groove before the etching process that removes touch material. This filler layer is strategically positioned to prevent touch material residue from remaining in the groove after etching, thereby preventing short circuits. The filler layer acts as a placeholder that maintains groove structure during manufacturing while ensuring clean trace formation without residual material causing reliability issues.

The patent introduces an intermediary filler layer that mediates between the groove structure and the touch material. This filler layer simplifies the manufacturing process by eliminating the need for complex residue removal steps. The filler layer acts as a temporary structure that facilitates touch signal line connection through the groove while preventing material residue, thereby reducing manufacturing complexity despite maintaining necessary groove depth for electrical connectivity.

The patent converts the potential harm of deep groove exposure into a benefit by using the filler layer as a protective element. Instead of trying to prevent residue formation through more aggressive etching, the filler layer is designed to be present during etching to catch and contain any residual touch material. This transforms the exposure depth issue from a harmful factor generating residue into a controlled process where the filler layer benefits from the deep exposure while preventing the harmful residue effect.