Abstract: Techniques for selective measurement and monitoring of boric acid concentrations in processing solutions are provided. Methods include the use of a complexing agent that reacts with hydrolyzing ions, for example, ethylenediaminetetraacetic (EDTA) acid salts in potentiometric titration. In such methods, a boric acid concentration in a processing solution can be accurately measured and monitored.

Abstract: The present invention relates to a fluorescent tube structure, which fluoresces when connecting electric power, including a base plate and an upper cover forming a enclosed discharge chamber, wherein pellicles applied inside to enable an illuminant to project to the curved surface of the upper cover and then be reflected to the base plate, which enhances illumination and also reduces illumination loss to the lateral, thereby improving illuminant efficiency. The present invention can be used as a backlight on illuminating and electronic display devices.

Abstract: The present invention relates to a fluorescent tube structure, which fluoresces when connecting electric power, including a base plate and an upper cover forming a enclosed discharge chamber, wherein pellicles applied inside to enable an illuminant to project to the curved surface of the upper cover and then be reflected to the base plate, which enhances illumination and also reduces illumination loss to the lateral, thereby improving illuminant efficiency. The present invention can be used as a backlight on illuminating and electronic display devices.

Abstract: A light emitting panel module utilized to provide a light emitting source for a back-lighted panel, and having a modularized structure. Upon vacuum pressing and molding under a high temperature, a sheet light emitting tube is formed thereof, and enables forming of a plurality of variant shapes according to requirements of actual practical applications. The light emitting tube is further adapted to provide uniform light color and long life usage having an upper panel and a lower panel, with the upper panel being formed as the light emitting tube from variant shape arrangements according to requirements of actual practical applications. The lower panel is bonded to the upper panel, thereby forming a sealed light emitting panel module. A space between the upper panel and the lower panel forms a hollow receptacle space, whereby providing filling of a noble gas therein, thus enhancing lifespan of the light emitting tube.