US 11,809,648 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, Quanzhou (CN); and Song Xin Wang, Xiamen (CN)
Assigned to TPK Advanced Solutions Inc., Xiamen (CN)
Filed by TPK Advanced Solutions Inc., Xiamen (CN)
Filed on Jan. 28, 2022, as Appl. No. 17/586,813.
Prior Publication US 2023/0244333 A1, Aug. 3, 2023
Int. Cl. G06F 3/041 (2006.01)
CPC G06F 3/041 (2013.01) 12 Claims
OG exemplary drawing
 
1. A 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 comprises:
an electrode portion; and
a silver trace portion electrically connected to the electrode portion; 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%.