• 专利标题:   Interconnect structure for forming integrated circuit (IC) has contiguous layer of graphene formed on exposed sidewall surfaces and topmost surface of copper-containing structure that is present on surface of substrate.
  • 专利号:   US8610278-B1, CN103579097-A
  • 发明人:   OTT J A, BOL A A
  • 专利权人:   INT BUSINESS MACHINES CORP, INT BUSINESS MACHINES CORP
  • 国际专利分类:   H01L023/48, H01L023/52, H01L029/40, H01L021/768, H01L023/532
  • 专利详细信息:   US8610278-B1 17 Dec 2013 H01L-023/48 201401 Pages: 12 English
  • 申请详细信息:   US8610278-B1 US587521 16 Aug 2012
  • 优先权号:   US551962, US587521

▎ 摘  要

NOVELTY - The interconnect structure has at least one copper-containing structure (18) located on surface of a substrate (12), and contiguous layer of graphene (24) with first portion having bottommost surface in contact with portion of substrate surface. Each dielectric material portion (26L,26R) has bottommost surface in contact with another portion of substrate surface, topmost surface horizontally coplanar with the topmost surface of second portion of contiguous layer of graphene and sidewall surface in contact with first portion of copper-containing structure. USE - Interconnect structure for forming IC. ADVANTAGE - Improves electromigration resistance of the structure since presence of contiguous layer of graphene on the copper-containing structure reduces copper oxidation and surface diffusion of copper ions without increasing the resistance of copper-containing structure. DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of the structure after forming a low k dielectric material and etching back the low k dielectric material. Substrate (12) Copper-containing structure (18) Contiguous layer of graphene (24) Dielectric material portion (26L,26R)