US 12,079,407 B2
Touch sensor
Shao Jie Liu, Xiamen (CN); Si Qiang Xu, Xiamen (CN); Chien Hsien Yu, Hsinchu County (TW); Chia Jui Lin, Taoyuan County (TW); Jian Zhang, Xiamen (CN); Wei Na Cao, Changting County (CN); Mei Fang Lan, Xiamen (CN); Jun Hua Huang, Qingliu County (CN); Mei Fen Bai, Xiamen (CN); and Song Xin Wang, Quanzhou (CN)
Assigned to TPK Advanced Solutions Inc., Xiamen (CN)
Filed by TPK Advanced Solutions Inc., Xiamen (CN)
Filed on Sep. 26, 2023, as Appl. No. 18/474,253.
Application 18/474,253 is a continuation of application No. 17/586,813, filed on Jan. 28, 2022, granted, now 11,809,648.
Prior Publication US 2024/0012499 A1, Jan. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01)
CPC G06F 3/041 (2013.01) 10 Claims
OG exemplary drawing
 
1. A touch sensor having a visible area and a peripheral area adjacent to at least one side of the visible area, the touch sensor comprising:
a substrate;
a plurality of sensing channels disposed at intervals on a surface of the substrate, wherein each of the sensing channels extends from the visible area to the peripheral area to form an electron transferring path across the visible area and the peripheral area, and comprises:
an electrode portion; and
a silver trace portion electrically connected to the electrode portion;
wherein the electrode portion and the silver trace portion are on a same horizontal plane; and
a protective layer disposed on the substrate and covering and encapsulating the sensing channels;
wherein the sensing channels and the protective layer are configured to withstand a salt spray test, and, after the touch sensor is subjected to the salt spray test with sodium chloride solution of a mass percentage concentration of 5% at a rate of 1 mL/H to 2 mL/H under an ambient temperature of 35° C. for 48 hours, a resistance change rate of any one of the sensing channels is less than or equal to 10%, and a resistance distribution difference between the sensing channels is less than or equal to 10%.