Patent ID: 7335980
Filing Date: 2008-02-26
Classification: H01L,Y10T

Abstract:
1. An interconnect structure comprising: a low k dielectric material having a dielectric constant of about 3.0 or less, having a first atomic concentration of C ranging between about 5 atomic % to about 45 atomic %, and having at least one conductive feature embedded therein; and a hardmask located above and abutting a surface of said low k dielectric material, said hardmask including: a lower region of a hermetic oxide material having a second atomic concentration of C that is less than about 5 atomic %, wherein said first atomic % concentration of C is greater than said second atomic % concentration of C; and an upper region abutting said lower region of said hardmask and comprising atoms of Si, C and H and comprising from about 10 to about 80 atomic % C.