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PCM Glossary Category: S

Surface Roughness (Ra)

Measurement of the texture of an etched surface.

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Stripping

Removal of masking photoresist after etching.

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Stress-Free Machining

Key advantage: no distortion introduced.

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Step Etching

Performing multiple etch cycles at different depths to achieve tiered features.

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Step-and-Repeat

Layout method to maximize parts per sheet.

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Statistical Process Control (SPC)

Monitoring etching process capability using data analysis.

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Stainless Steel Etching

Common in aerospace, medical, and electronics.

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Spray Etching

A method of applying etchant via spray nozzles to achieve uniform removal.

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Sheet Metal

Flat rolled material stock.

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Selective Etching

Targeted etching of specific metals/layers in a stack.

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