Patent ID: 6990734

Claim:
A method for shielding one or more circuits of a printed circuit board, comprising the steps of: depositing a first layer of metal on a substrate of the printed circuit board; depositing a first layer of dielectric material on the first layer of metal; printing more than one circuit on the first dielectric layer; depositing a second dielectric layer over the first dielectric layer and over the more than one printed circuit thereon; forming a trench opening in the two layers of dielectric material such that the trench opening surrounds the more than one printed circuit, and the metal of the first layer is exposed by the trench opening; depositing a second layer of metal over the second layer of dielectric material such that the second layer of metal plates the trench opening and makes electrical contact with the first metal layer; and providing one or more gaps in the metal deposited in the trench opening and routing a circuit trace therethrough.