TOC Measuring of Etching Solutions for Etching Process by using the TOC-5000A

Introduction

Etching solution is reused for precision processing of CRT shadow masks and the etching process of patterns of printed circuit boards. However, etching solution deteriorates if organic matter concentration increases due to impurities and chemicals (surface-active agent etc.), and etching speed also slows down. In a situation like this, Shimadzu's total organic carbon analyzer TOC-5000A monitors the concentration of organic matter in the etching solution, so that changes can be made to restore operation efficiency.

May 20, 2000 GMT