ʻO ke kumumanaʻo o ka ʻenehana touch foil no ka pale capacitive projected, nona nā ʻāpana kiʻiʻoniʻoni ʻelua, ʻo ka grid matrix layer he mau laina metala crisscrossing i nā koʻi X a me Y, ʻo kēlā me kēia matrix e hana i kahi ʻike ʻike e hiki ai ke ʻike i ka paʻi ʻana o ka lima kanaka, ʻo ka foil paʻi wale nō ke ala hou e hiki ai ke hoʻokō i ka curved, piha maopopo, wai ʻole, anti-pollution ma waena o ke aniani, anti-lightless interference.