Use of Chlorite As an Inspection Tool
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-07
In the fabrication of printed circuit boards, it is often necessary to ensure that copper surfaces are clean prior to the application of additional coatings onto the copper surface. The copper surface is coated in a conventional manner with sodium chlorite. A visual observation of a copper surface coated with sodium chlorite will show any areas where contaminants were on the copper surface prior to the application of the sodium chlorite. The sodium chlorite can be removed in a conventional manner using cleaners such as PENNSALT K-2* and hydrochloric acid. * Trademark of Pennwalt Corp.