Abstract:
An improved method of forming an integrated circuit that includes a dual damascene interconnect is described. A contact via hole is formed in a dielectric layer disposed above a semiconductor substrate. A protective layer is disposed on top of the dielectric layer and in the contact via hole, and subsequently forming as a recessed plug in the via, followed by etching to form a trench to complete formation of a dual damascene opening.
Abstract:
An improved method of forming an integrated circuit that includes a dual damascene interconnect is described. A contact via hole is formed in a dielectric layer disposed above a semiconductor substrate. A protective layer is disposed on top of the dielectric layer and in the contact via hole, and subsequently forming as a recessed plug in the via, followed by etching to form a trench to complete formation of a dual damascene opening.
Abstract:
A new method is provided for the creation of contact holes. The DOF and MEF of closely packed holes can be improved using Alternating Phase Shifting Mask (Alt PSM) for the exposure of the holes. However, Alt PSM are dependent on hole density or hole separation and are less effective where holes are relatively further separated from each other. In order to improve DOF and MEF performance for the creation of holes, the invention adds extra holes to a given pattern of contact holes on the surface of a first mask, thus densifying the pattern of holes on the first mask and therefore reducing the range of the hole-diameter to hole separation ratio. The pattern of added holes is alternating in phase with the pattern of desired holes. The added holes will be filled up using a second mask.
Abstract:
The present invention relates to a polymer with at least one pericyclic protective group such as 2-methyl-2-bicyclo[2,2,1]heptanyl. The resist composition containing the polymer can be used as a chemically amplified resist and exhibits strong etch resistance. In addition, a line-and-space pattern of 0.1 &mgr;m pitch can be resolved successfully using the resist composition.
Abstract:
The present invention provides a cyclic dione polymer, which is a homopolymer or a copolymer of a cyclic dione monomer selected from those represented by formulae (I) and (II) wherein A and B may be the same or different and are independently selected from the group consisting of halogen, hydrogen, C3-20 cyclic or pericyclic alkyl, C1-20 linear and branched alkyl, C6-20 aryl, C7-20 arylalkyl, C7-20 alkylaryl, silyl, alkylsilyl, germyl, alkylgermyl, alkoxycarbonyl, acyl, and a heterocylic group; or, A and B are linked together to form a C3-20 saturated or unsaturated cyclic hydrocarbon group or a substituted or unsubstituted heterocyclic group; C is selected from the group consisting of oxygen, sulfur, —CH2—, and —SiH2—, wherein each R1 is independently selected from C1-20 alkyl and phenyl.