Patent ID: 8957479
Filing Date: 2015-02-17
Classification: H01L

Abstract:
1. A field effect transistor structure comprising: a substrate; a first rectangular fin structure positioned on said substrate, said first rectangular fin structure having a bottom contacting said substrate, a top opposite said bottom, and sides between said top and said bottom; a second rectangular fin structure positioned on said substrate, said second rectangular fin structure having a bottom contacting said substrate, a top opposite said bottom, and sides between said top and said bottom, said sides of said second rectangular fin structure being parallel to said sides of said first rectangular fin structure; a trench insulator positioned on said substrate and positioned between a side of said first rectangular fin structure and a side of said second rectangular fin structure; a gate conductor positioned on said trench insulator, positioned over said sides and said top of said first rectangular fin structure and positioned over said sides and said top of said second rectangular fin structure, said gate conductor running perpendicular to said sides of said first rectangular fin structure and said sides of said second rectangular fin structure; and a gate insulator positioned between said gate conductor and said first rectangular fin structure and between said gate conductor and said second rectangular fin structure, said sides of said first rectangular fin structure comprising a lower portion and an upper portion, said upper portion of said sides of said first rectangular fin structure being relatively closer to said top of said first rectangular fin structure and said lower portion of said sides of said first rectangular fin structure being relatively farther from said top of said first rectangular fin structure, said gate conductor being positioned adjacent to said upper portion of said sides of said first rectangular fin structure, said lower portion of said sides of said first rectangular fin structure being positioned adjacent to said trench insulator, said gate conductor being positioned adjacent to a relatively larger portion of said sides of said second rectangular fin structure and being positioned adjacent to a relatively smaller portion of said sides of said first rectangular fin structure, said first rectangular fin structure comprising a central semiconductor portion comprising a channel region, and comprising conductive end portions comprising source and drain regions, and said second rectangular fin structure comprising a central semiconductor portion comprising a channel region, and comprising conductive end portions comprising source and drain regions.