PAS Resin Shielding Member with Chemical Etching Adhesion

The surface of the PAS resin molded product is subjected to etching treatment before metal film formation to create a rough surface structure. This preliminary surface modification increases the surface area and creates mechanical interlocking sites that enhance adhesion of the subsequent metal coating layer.

The surface roughness parameter is changed through etching treatment to improve adhesion. By controlling the etching depth and surface roughness within specific ranges, the patent achieves optimal balance between adhesion enhancement and surface smoothness requirements.

The etching treatment parameters (etchant concentration, temperature, time) are precisely controlled to achieve optimal surface roughness without excessive erosion. This parameter optimization ensures the surface becomes rough enough for adhesion while maintaining sufficient surface strength and integrity.

The etching treatment is applied partially and controllably to create sufficient surface roughness for adhesion while avoiding complete surface degradation. The treatment depth is optimized to balance adhesion enhancement with surface strength preservation.

The patent replaces mechanical surface roughening methods (sand blasting, shot blasting) with chemical etching treatment. This substitution achieves surface roughness and adhesion enhancement through chemical reaction rather than mechanical impact, preserving surface smoothness while improving coating adhesion.

The surface roughness parameter is precisely controlled through chemical etching to achieve optimal adhesion without the excessive roughness caused by mechanical blasting methods. The chemical etching process allows fine control over surface morphology.

The patent combines multiple functions into a single integrated process. The etching treatment and metal film formation are performed in sequence as a unified surface treatment process, eliminating the need for separate primer coating and multiple plating steps. This merging reduces manufacturing complexity while maintaining performance.

The etching treatment serves multiple functions: surface roughening for adhesion, surface cleaning, and surface activation. The subsequent metal film formation provides both electromagnetic shielding and corrosion protection. This multi-functionality reduces the number of separate processes needed.