Page 16 - PCMI Journal December 2021

Pre-Treatment – Preparation of Metal Surface
Sean Hill, Product Manager, Eternal Technology Corporation
8/31/21
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Pre-treatment
• Primary CM pretreat consists of basic PCMI chem clean • Alkaline cleaner (degreaser).
• Water Rinse.
• Acid Rinse (primarily for neutralization).
• Water Rinse.
• Typically, they do not include micro-etch or other resist adhesion
enhancements – need to maintain surface.
• May include pumice brush Scrub.
• Combination of minimal treatment and smooth surface can challenge resist feature adhesion.
Surface Preparation
Surface Preparation is the Foundation of The Dry Film Process
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Issue 138 December 2021 PCMI Journal 16
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