Overview of Affymetrix GeneChip Technology GeneChip Technology Affymetrix Inc Miniaturized, high density arrays Expression arrays 1,300,000 DNA oligos 1-cm by 1-cm DNA mapping array 7,000,000 DNA oligo 1.3 by 1.3 cm Manufacturing Process Solid-phase chemical synthesis and Photolithographic fabrication techniques employed in semiconductor industry Photolithographic Synthesis Manufacturing Process Probe arrays are manufactured by lightdirected chemical synthesis process which