Abstract:
As etching progresses from one layer of material to another in reactive ion etching systems, the partial pressures of the reaction chamber gas components change. In constant pressure reactive ion etching systems, changes in chamber pressure are corrected by changes in the etchant species flow rate into the reaction chamber. By monitoring flow rate, information is obtained which may be used to identify points where partial pressures change, and latter may, in turn, be used to derive etching points in the material being etched.
Abstract:
A gas sensor and method of gas sensing, e.g., of a type as useful with downstream sensor elements for determining the plasma conditions (e.g., plasma etching end point) in a semiconductor etching facility that utilizes halogen-containing plasma and/or oxygen-containing plasma. Such sensor elements are capable of exhibiting temperature change in the presence of energetic gas species, e.g., fluorine, chlorine, iodine, bromine, oxygen, and derivatives and radicals thereof that are generated by the plasma, and correspondingly generating an output signal indicative of such temperature change for determination of the plasma conditions in the etching plasma processing facility.
Abstract:
A chemical liquid treatment apparatus includes processing chambers; a chemical liquid feeding unit configured to cyclically feed a chemical liquid into the processing chambers; and a modifying unit. The modifying unit, when using a chemical liquid in which an effect thereof varies with a chemical liquid discharge time, is configured to calculate a variation of the effect of the chemical liquid based on the chemical liquid discharge time and is configured to modify the chemical liquid discharge time for each of the processing chambers based on the calculated variation of the effect of the chemical liquid and a cumulative time of the chemical liquid discharge time.