Patent ID: 6180445
Filing Date: 2001-01-30
Classification: H01L

Abstract:
A method of creating a high-Q inductor on a surface of a semiconductor substrate whereby said substrate is in addition used for mounting of flip chip semiconductor devices, comprising the steps of:providing a semiconductor substrate whereby a surface of said substrate is divided into an active region adjacent to a region of electrical isolation adjacent to a region over which one or more inductors are to be created;depositing a layer of insulation over a surface of said substrate;depositing a layer of intra-metal dielectric over the surface of said layer of insulation;creating a network of metal interconnects and metal points of contact in said layers of insulation including said layer of intra-metal dielectric whereby said network of metal interconnects and metal points of contact provide points of electrical contact in a surface of said layer of intra-metal dielectric whereby said points of electrical contact connect to points of electrical contact in a surface of said substrate; depositing a layer of low-K polyimide over a surface of said substrate;creating a pattern of redistribution vias in said layer of low-K polyimide; creating a network of conductive interconnect lines in addition to creating one or more inductors on a surface of said layer of low-K polyimide;depositing a layer of polyimide over a surface of said layer of low-K polyimide thereby including said network of conductive interconnect lines thereby furthermore including said one or more inductors on a surface of said layer of low-K polyimide; andperforming backend processing thereby interconnecting said flip chips to said network of conductive interconnect lines.