Patent ID: 8085401
Filing Date: 2011-12-27
Classification: G01N

Abstract:
1. An apparatus for measuring an attribute of ozone in an ozonated liquid, the apparatus comprising: a delivery pipeline to carry the ozonated liquid to a process tool, the delivery pipeline including a plurality of reflection sites; a light source that directs a first band of visible light and a second band of visible light through the ozonated liquid in the delivery pipeline along a substantially shared path defined in part by the plurality of reflection sites, wherein ozone in the ozonated liquid has a greater absorption with the first band of visible light than with the second band of visible light; and a photosensor that senses the first band of visible light and the second band of visible light passing through the ozonated liquid for measuring an attribute to the ozone in the ozonated liquid, wherein the plurality of reflection sites increase a length of the substantially shared path.