SSB is manufactured by depositing a thin metal coating, like aluminum over an antistatic polyester film substrate. This metalized x-layer protects the devices or the components in the bag from electrostatic fields.

According to the position of the metalized x-layer, there are two types of metalized shielding bags, Metal-In and Metal-Out, in the market. The metal-in or buried metal shielding bags are the most commonly used and recommended for packaging of static-sensitive components. They also tend to be superior to the metal-out bags in durability and cost.

The metal-out shielding bags also protect the devices in the bag against static-induced damage. The metal x-layer is closer to the
outside surface so these bags have lower resistance readings than the metal-in bags, which can be important in some applications.

Our SSB is all metal-in type, which has the metalized x-layer inside.