US 11,054,948 B2
Light transmissivity-controlled touch sensor panel design
Seung Hoon Lee, Santa Clara, CA (US); Ji Hun Choi, Los Gatos, CA (US); Chun-Hao Tung, San Jose, CA (US); and Sunggu Kang, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 27, 2019, as Appl. No. 16/585,957.
Claims priority of provisional application 62/742,038, filed on Oct. 5, 2018.
Prior Publication US 2020/0110485 A1, Apr. 9, 2020
Int. Cl. G06F 3/045 (2006.01); G06F 3/044 (2006.01); G06F 3/041 (2006.01)
CPC G06F 3/044 (2013.01) [G06F 3/0412 (2013.01); G06F 3/0418 (2013.01); G06F 2203/04103 (2013.01); G06F 2203/04112 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A touch sensor panel comprising:
a substrate including a first side and a second side;
a passivation layer;
a first plurality of touch electrodes formed on the first side of the substrate; and
a second plurality of touch electrodes formed on the second side of the substrate,
wherein a component of the touch sensor panel, other than the first plurality of touch electrodes and the second plurality of touch electrodes, is configured to prevent light configured to activate the passivation layer during fabrication of the touch sensor panel from being transmitted from the first side of the substrate to the second side of the substrate, the component configured with a transmissivity less than or equal to a transmissivity threshold at which an intensity of the light transmitted from the first side of the substrate to the second side of the substrate is equal to an activation intensity threshold of the passivation layer.