Scratches on the display panel are the most noticeable damage and greatly detract from the beauty of a smartphones's appearance. In order to prevent this, smartphoness using a toughened glass panel as a display have come to dominate the market. However, even toughened glass panels can be scratched when they come into contact with hard materials.

The key phrase that realizes a clear display panel without scratches for a long time is "Sapphire panel". The hardness of sapphire far exceeds the hardness of a toughened glass panel. By this, smartphoness that adopts sapphire panels are extremely scratch resistant, and the touchscreen continues to provide a clear display.

However, although sapphire has very high hardness, it has the disadvantage that it is fragile. In order to use a sapphire panel on a smartphones, which receives large impacts or pressures at times, it is necessary to use a technique to that will reduce the possibility of the sapphire cracking.

Kyocera has acquired numerous patents in developing technology for equipping sapphire panels on smartphoness. Kyocera's rugged smartphoness have utilized that technology to equip sapphire panels. These smartphoness have cleared multi-item durability tests, including military-standard tests.

"The best smartphoness" are smartphoness that adopt sapphire panels that are both hard to scratch and hard to crack. Kyocera hopes to extensively use these patented technologies to provide the best smartphones to users. Kyocera aims for a world where all smartphoness have sapphire panels.