Patent ID: 7595525

Claim:
A capacitor formed as part of an integrated circuit (IC) fabrication process, comprising: a bottom conductive electrode formed on a semiconductor substrate; an antireflective nonconductive capacitor dielectric disposed over the bottom conductive electrode and comprising a first layer comprising a dielectric material, a second layer comprising an antireflective material, and a third layer comprising a dielectric material; the antireflective nonconductive capacitor dielectric having a first and a second edge which align with a first and a second edge of the bottom conductive electrode, respectively; and a top conductive electrode formed over the antireflective nonconductive capacitor dielectric, where the antireflective nonconductive capacitor dielectric mitigates adverse effects associated with reflections associated with forming the bottom conductive electrode; wherein at least one of: the bottom conductive electrode comprises an about 500 Angstrom layer of titanium nitride (TiN) overlying an about 200 Angstrom layer of Titanium (Ti) that overlies an about 5 kilo Angstrom layer of Aluminum (Al) and/or copper (Cu) overlying an about 140 Angstrom layer of titanium (Ti) that overlies the semiconductor substrate, the first layer is between about 30 and about 100 Angstroms thick, the third layer is between about 30 and about 100 Angstroms thick, the second layer is between about 150 and about 500 Angstroms thick, the first layer comprises an oxide based material (O), the third layer of comprises an oxide based material (O), the second layer comprises a silicon oxy-nitride based material (SiON), and the top conductive electrode comprises at least one of titanium (Ti), tantalum (Ta), titanium nitride (TiN) and tantalum nitride (TiN) based materials, the top conductive electrode has a thickness of between about 1.5 kilo Angstroms and about 2.5 kilo Angstroms, the capacitor has a capacitive density of about 1.23, the capacitor has a reflectivity of about 1.23, and the capacitor has a conductive contact having a diameter or width of a quarter (0.25) micron or below.