Enabling magnetic films in inductors integrated into semiconductor packages

    公开(公告)号:US11270959B2

    公开(公告)日:2022-03-08

    申请号:US15933599

    申请日:2018-03-23

    申请人: Intel Corporation

    摘要: Techniques for fabricating a semiconductor package comprising inductor features and a magnetic film are described. For one technique, fabricating a package includes: forming inductor features comprising a pad and a conductive line on a first build-up layer; forming a raised pad structure on the first build-up layer by fabricating a pillar structure on the pad, wherein a size of the pillar structure is approximately equal or equal to a corresponding size of the pad such that the pillar structure and the pad are aligned or minimally misaligned relative to each other; encapsulating the inductor features and the raised pad structure in a magnetic film; planarizing the magnetic film until top surfaces of the raised pad structure and magnetic film are co-planar; depositing an additional layer on the top surfaces; and forming a via on the raised pad structure by removing portions of the additional layer above the raised pad structure.