Electroforming and electroplating both rely on electrochemical deposition in electrolyte solutions, but they are fundamentally different metal fabrication technologies. The biggest distinction lies in their purpose: electroforming creates standalone, self-supporting metal parts, while electroplating adds a thin metal coating onto an existing substrate.

How It Works

ElectroformingA conductive mandrel (master mold) is prepared, and metal ions deposit onto the mandrel surface in the electroforming bath. After the required metal thickness is achieved, the deposited metal layer is separated from the mandrel. The final metal piece is the electroformed component, and the mandrel can be reused for mass production.

ElectroplatingThe base material (substrate) is the final workpiece. Metal ions deposit directly onto the surface of the existing part to form a thin coating. The substrate remains as the core of the finished product and is not removed after plating.

Core Advantages

Electroforming

1. Ultra-high dimensional accuracy and exceptional repeatability, capable of forming ultra-fine patterns, micro holes and complex geometries that other machining cannot achieve.
2. Burr-free, stress-free metal parts with uniform wall thickness across the entire surface.
3. Can produce thin, self-supporting metal structures such as stencils, fine mesh and precision masks.
4. Mandrel reusability reduces unit cost for medium and large batch orders.

Electroplating

1. Improve surface performance of existing parts: corrosion resistance, wear resistance, conductivity and aesthetic appearance.
2. Low cost for thin surface coating, suitable for surface modification of mass-produced components.
3. Flexible coating material options: gold, nickel, silver, copper, chrome and alloy layers.
4. Minimal change to the original size and mechanical structure of the base workpiece.

Typical Applications

Electroforming

• Semiconductor packaging stencils, ultra-fine pitch steel mesh, BGA ball mask stencils
• Optical shadow masks, precision filter screens, micro sieves
• Thin-walled metal components, encoder discs, high-precision electroformed foils

Electroplating

• PCB surface plating, EMI shielding part surface treatment
• Hardware anti-corrosion coating, decorative metal finishing
• Automotive and electronic parts surface enhancement, connector contact plating

Design Considerations

1. Thickness limit: Electroforming can build thicker metal structures (from several microns to hundreds of microns). Electroplating is mostly limited to thin coatings, usually less than tens of microns.
2. Tolerance control: Electroforming delivers tighter tolerance for micro features. Electroplating will add coating thickness on all surfaces, which needs to be pre-calculated in drawing design.
3. Material selection: Electroforming parts are made purely from deposited metal. Electroplating only changes the surface layer, the substrate determines the bulk mechanical property.
4. Mandrel requirement: Electroforming needs custom master tooling. Electroplating does not require extra molds, only the original parts to be coated.