The application relates to the field of
semiconductor process equipment, in particular to a device for large-capacity liquid
medicine storage of
semiconductor equipment and a liquid
medicine supply
system. The device comprises a
liquid storage tank provided with a
liquid storage cavity, the upper portion of the
liquid storage cavity is provided with a cleaning cavity in fluid communication with the liquid storage cavity; the internal volume of the cleaning cavity is smaller than that of the liquid storage cavity; a liquid inlet
pipe is arranged to introduce liquid
medicine into the liquid storage cavity of the
liquid storage tank from the outside; a liquid outlet
pipe is arranged at the bottom of the liquid storage cavity and connects the liquid storage cavity of the
liquid storage tank to a liquid source; a waste
pipe is arranged at the top of the cleaning cavity to
discharge the liquid medicine bubbles in the cleaning cavity; and a vent pipe is arranged to connect the cleaning cavity of the
liquid storage tank with the outside to keep the air pressure in the cleaning cavity of the liquid
storage tank consistent with the
ambient air pressure. The application improves the separation efficiency of large-capacity liquid medicine and gas, reduces the probability of generating bubbles in the liquid medicine, improves the uniformity of
wafer surface coating, and can meet the high-integration equipment
layout.