Types of Shielding
- Solid Copper Foil
- Mesh Copper Foil
- Conductive Ink Coatings
- Metal Sputtering
Solid copper is the most common method of shielding. Solid copper shields increase the rigidity of the circuit, and should be included in thickness for the bend radius review. Copper shield can be put on one or both sides of the circuit. Solid copper can also cover selective conductors.
An artwork design that relieves much of the copper shield areas by the use of a pattern. Crosshatching helps the circuit to retain its flexibility and can be put on one or both sides. Crosshatch shielding can also cover selective conductors.
Conductive silver can be substituted for the copper for shielding purposes in some applications. Silver shielding is not recommended for a dynamic flexing application due to the possibility of cracking. Silver can be a solid or cross-hatched shield and can be put on one or both sides of the circuit. It can also cover selected conductors only.
Note: Additional shielding options exist, such as shielding between circuit conductor.