relative hardness of parylene

The parylene polymers are deposited from the vapor phase by a process which the illustration below shows a comparison of Parylene C, Epoxy and Polyurethane hardness as measured using the "Sward" scale. By analysis of the data below it is evident that Parylene C provides superior mechanical protection at thicknesses utilized for conformal coating applications.

Sward Scale

Sward relative hardness scale

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