Watch Component Composite Insert Adhesion via Laser Texturing

The patent applies preliminary action by creating reinforced adhesion zones on the substrate surface before filling the cavity with composite material. These zones are formed by laser treatment or chemical etching to create micro-roughness and increase surface area, establishing strong bonding interfaces in advance that compensate for the shrinkage that will occur during subsequent polymerization. This preliminary preparation ensures that when the composite material shrinks, the reinforced zones maintain adequate adhesion.

The patent applies local quality by creating non-uniform surface characteristics on the substrate - specifically, reinforced adhesion zones with increased roughness and surface area are created in specific locations (such as the cavity walls and bottom) while other areas remain smooth. This localized modification ensures that adhesion is enhanced precisely where the composite material contacts the substrate, without affecting the overall appearance or properties of the substrate. The selective treatment of specific zones addresses the adhesion problem locally where it is most critical.

The patent replaces complex mechanical surface treatment methods (such as mechanical grinding, polishing, or chemical mechanical polishing) with laser treatment or chemical etching processes. These alternative methods achieve the same surface modification goals (increased roughness, increased surface area) but with simpler, more controllable, and more integrated processes that can be applied directly to the cavity structure without requiring separate mechanical processing steps.

The patent applies parameter changes by modifying surface properties (roughness, surface area, chemical composition) through controlled laser treatment or chemical etching parameters. By adjusting laser power, pulse duration, scanning speed, or chemical concentration and exposure time, the process optimizes adhesion enhancement while maintaining process simplicity. These parameter adjustments allow precise control over the degree of surface modification to achieve the required adhesion without excessive process complexity.