This solar cell has incorporated three proprietary technologies in an effort to increase efficiency. Firstly, reflectivity from the acceptance surface has been reduced through RIE (reactive ion etching) microfabrication using a nano-sized mask material. This resulted in the increased amount of absorbed light. Secondly, the lowering of electrical performance in crystalline has been suppressed through a new electrode material. Thirdly, effective electrical output surface area has been expanded by thinning grid collector electrodes. Through these technologies, Mitsubishi achieved the world's highest conversion efficiency of 18%.