摘要:
Fabricating an integrated circuit using a cap layer that includes one or more gaps or voids. The gaps or voids are provided prior to performing deposition and cure for an inter-layer dielectric (ILD) layer adjoining the cap layer. The gaps or voids reduce and prevent tensile stress buildup by allowing for stress relaxation, hence preventing catastrophic failure of the integrated circuit.
摘要:
The present invention provides an enhanced interconnect structure with improved reliability. The inventive interconnect structure has enhanced mechanical strength of via contacts provided by embedded metal liners. The embedded metal liners may be continuous or discontinuous. Discontinuous embedded metal liners are provided by a discontinuous interface at the bottom of the via located within the interlayer dielectric layer.
摘要:
The present invention provides an enhanced interconnect structure with improved reliability. The inventive interconnect structure has enhanced mechanical strength of via contacts provided by embedded metal liners. The embedded metal liners may be continuous or discontinuous. Discontinuous embedded metal liners are provided by a discontinuous interface at the bottom of the via located within the interlayer dielectric layer.
摘要:
The present invention provides an enhanced interconnect structure with improved reliability. The inventive interconnect structure has enhanced mechanical strength of via contacts provided by embedded metal liners. The embedded metal liners may be continuous or discontinuous. Discontinuous embedded metal liners are provided by a discontinuous interface at the bottom of the via located within the interlayer dielectric layer.
摘要:
The present invention provides an enhanced interconnect structure with improved reliability. The inventive interconnect structure has enhanced mechanical strength of via contacts provided by embedded metal liners. The embedded metal liners may be continuous or discontinuous. Discontinuous embedded metal liners are provided by a discontinuous interface at the bottom of the via located within the interlayer dielectric layer.
摘要:
The present invention provides an enhanced interconnect structure with improved reliability. The inventive interconnect structure has enhanced mechanical strength of via contacts provided by embedded metal liners. The embedded metal liners may be continuous or discontinuous. Discontinuous embedded metal liners are provided by a discontinuous interface at the bottom of the via located within the interlayer dielectric layer.
摘要:
When an interconnect structure is built on porous ultra low k (ULK) material, the bottom of the trench and/or via is usually damaged by a following metallization process which may be suitable for dense higher dielectric materials. Embodiment of the present invention may provide a method of forming an interconnect structure on an inter-layer dielectric (ILD) material. The method includes steps of treating an exposed area of said ILD material to create a densified area, and metallizing said densified area.
摘要:
A method of creating metal caps on copper lines within an inter-line dielectric (ILD) deposits a thin (e.g., 5 nm) metal blanket film (e.g., Ta/TaN) on top the copper lines and dielectric, after the wafer has been planarized. Further a thin dielectric cap is formed over the metal blanket film. A photoresist coating is deposited over the thin dielectric cap and a lithographic exposure process is performed, but without a lithographic mask. A mask is not needed in this situation, because due to the reflectivity difference between copper and the ILD lying under the two thin layers, a mask pattern is automatically formed for etching away the Ta/TaN metal cap between copper lines. Thus, this mask pattern is self-aligned above the copper lines.
摘要:
The embodiments of the invention provide a metal capping process for a BEOL interconnect with air gaps. More specifically an apparatus is provided comprising metal lines within a first dielectric. Metal caps are over the metal lines, wherein the metal caps contact the metal lines. In addition, air gaps are between the metal lines, wherein the air gaps are between the metal caps. A second dielectric is also provided over the bottom portion of a first dielectric, wherein a top portion of the second dielectric is over the metal caps, and wherein top portions of the first dielectric and bottom portions of the second dielectric comprise sides of the air gap. The apparatus further includes dielectric caps over the metal lines, wherein the dielectric caps contact the metal caps.
摘要:
The embodiments of the invention provide a metal capping process for a BEOL interconnect with air gaps. More specifically an apparatus is provided comprising metal lines within a first dielectric. Metal caps are over the metal lines, wherein the metal caps contact the metal lines. In addition, air gaps are between the metal lines, wherein the air gaps are between the metal caps. A second dielectric is also provided over the bottom portion of a first dielectric, wherein a top portion of the second dielectric is over the metal caps, and wherein top portions of the first dielectric and bottom portions of the second dielectric comprise sides of the air gap. The apparatus further includes dielectric caps over the metal lines, wherein the dielectric caps contact the metal caps.