Patent ID: 9006584
Filing Date: 2015-04-14
Classification: H01F,H01L,H05K

Abstract:
1. An isolation device, comprising: a monolithic substrate; a pre-metal dielectric (PMD) layer disposed over said monolithic substrate, said PMD layer including silicon dioxide; a first metal level disposed over said PMD layer; a silicon dioxide layer disposed over said first metal layer; a second metal layer disposed over said silicon dioxide layer, said second metal level extending into lower via holes in said silicon dioxide layer to form lower vias which make electrical connections to said first metal level; a polymer dielectric layer disposed over said second metal level, said polymer dielectric layer comprising primarily a layer of polymer selected from the group consisting of polyimide and poly(p-phenylene-2,6-benzobisoxazole) (PBO), said polymer being at least 20 microns thick; a third metal level disposed over said polymer dielectric layer, said third metal level extending into upper via holes in said polymer dielectric layer to form upper vias which make electrical connections to said second metal level; bondpads disposed over said third metal level; and a dielectric overcoat dielectric layer disposed over said third metal level, said dielectric overcoat dielectric layer exposing said bondpads; said isolation device containing a plurality of isolation components, selected from the group consisting of a capacitor and a transformer, said isolation components being formed in at least said second metal level and said third metal level, said isolation device being free of transistors.