Semiconductor Device and Method of Forming Shielding Material Containing Conductive Spheres

    公开(公告)号:US20240379580A1

    公开(公告)日:2024-11-14

    申请号:US18314571

    申请日:2023-05-09

    Abstract: A semiconductor device has a substrate and an electrical component disposed over the substrate. An encapsulant is deposited over the electrical component and substrate. A shielding material, containing a plurality of spheres embedded in a matrix, is formed on the encapsulant. The shielding material 144 can be formed by spray coating, printing, liquid flow, or droplets. The spheres can have a curved or angled shape, e.g., circular, oval, or many flat or curved surfaces joining as a globe. The spheres each have a shell formed over a core. The shell can be a conductive material, while the core is an insulating material. Alternatively, the shell can be an insulating material, while the core is a conductive material. The shielding material scatters electromagnetic interference noise waves by reflection off the shell of the spheres. The shielding material can absorb electromagnetic interference noise waves into the core of the spheres.

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