Tungsten and tantalum storage media

In the future a sputtered tantalum and tungsten atomic storage device may be manufactured. This system utilizes a sputtered atom of tungsten or tantalum to represent 0 and 1 in a computer. The sizes range from 198 pm[picometer] to 200 pm. At 200 picometer, a single digit would be 200 X 10 to the -12 meter. 200 pm= 0.000 000 007 787 401 574 803 inch. That means trillions of words per inch is probable.