DOUBLE SIDED TOUCH SENSOR ON TRANSPARENT SUBSTRATE

Compact touch sensors for touch sensitive devices and processes for forming the touch sensors are disclosed. The touch sensor structure can include a substrate, one or more underlying layers disposed on the substrate, one or more blocking layers disposed on the substrate or on one or more underlying layers, and one or more patterned layers disposed on the underlying layers or blocking layers. The one or more blocking layers can be configured to block underlying layers from exposure to certain wavelengths of light or from penetration of a laser beam that can cause damage. Additionally, the one or more underlying layers can be multi-functional, including the ability to block one or more light sources.