River sand, sea sand, machine-made sand or desert sand is not the raw material for making chips.
The high-purity quartz sand used in the manufacture of chips, quartz sand also needs to be carefully selected, the purity of high-purity quartz sand in the semiconductor manufacturing field will reach 5 9 (99.999%), as long as the purity is less than 99.998%, it can only be used to make quartz crucible, and then can only make optical fiber or advanced lighting equipment.
There are two sources of high purity quartz sand, formerly natural crystal and now quartz ore.
The sand river sand is better than sea sand, and the surface of sea sand has adsorbed salt.
Chip sand is better than river sand. The structure of sea sand is not suitable for chips.