CIRCUPOSIT™ 2200 Plus is designed for both horizontal and vertical processing of innerlayers. CIRCUBOND 140 cleaner is a low-foaming alkaline-spray cleaner, designed for use prior to treatment with CIRCUBOND etchant. CIRCUBOND Pre-Dip 2217 solution is designed to provide a surface compatible with the CIRCUBOND Treatment 2218 etch bath. The solution also protects the CIRCUBOND Treatment 2218 etch bath from drag-in of contaminants. CIRCUBOND Treatment 2218 etch is peroxide-sulfuric-based and formulated to produce a uniform, highly-textured and passivated surface coating on copper innerlayers.