Patent ID: 6258688
Filing Date: 2001-07-10
Classification: H01L

Abstract:
A method of creating a high-Q inductor on a surface of a semiconductor substrate, 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 at least one inductor is to be created;performing an N+ implant into a surface of said substrate thereby whereby said region of N+ implant is located in said region of electrical isolation and immediately adjacent to said region over which at least one inductor is to be created;creating a trench for a first Shallow Trench Isolation in a surface of said substrate whereby said trench for a first Shallow Trench Isolation is located in said region of electrical isolation and immediately adjacent to said active region;creating a trench for a second Shallow Trench Isolation in the surface of said substrate whereby said trench for a second Shallow Trench Isolation is adjacent to said N+ implant and underlies said surface region of said substrate over which at least one inductor is to be created;depositing and patterning a thick layer of protective material whereby said pattern removes said protective material from above said trench for a second Shallow Trench Isolation thereby exposing said trench for a second Shallow Trench Isolation;performing a high-energy ion implant into said exposed trench for a second Shallow Trench Isolation;removing said thick layer of protective material; andperforming backend processing thereby creating conducting interconnects to at least one point of electrical contact to devices contained in said active regions thereby furthermore creating at least one inductor overlying said surface region of said substrate over which at least one inductor is to be created.