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.
Abstract:
A method for reducing a critical dimension of a photoresist pattern while improving a line spacing between distal end portions of pattern lines wherein the method includes providing a substrate including an overlying resist; exposing the resist to an activating light source; baking the resist in a first baking process followed by developing the resist in a first development process to form a first resist pattern; then baking the first resist pattern in a second baking process followed by developing the first resist pattern in a second development process to form a second resist pattern having reduced dimensions; and, then dry trimming the second resist pattern to form a final resist pattern with reduced dimensions compared to the second resist pattern.
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:
In accordance with the objectives of the invention a new water soluble negative photoresist is provided for packing-and-unpacking (PAU) processing steps.
Abstract:
A method is provided for the creation of contact holes. The invention provides two masks. The first mask, referred to as the packed mask, comprises the desired contact holes, which are part of the creation of a semiconductor device. To the packed mask are added padding holes in order to increase the hole density of the packed mask. An insulation layer is formed to protect the first layer of material. The second mask, referred to an the unpacking mask, comprises openings at the same locations as the locations of the padding holes of the first mask, the openings provided in the second mask have slightly larger dimensions than the padding holes of the first mask. A first exposure is made using the packed mask, a second exposure of the same surface area is made using the unpacking mask. The unpacking mask is used to selectively cover the padding contact holes, resulting in the final image. Two types of unpacking masks can be used, a first type having unpacking holes that surround the desired hole pattern, a second type having unpacking holes that align with the desired hole pattern.
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 method is provided for removing sidelobes that are formed when patterning a positive photoresist layer with an Att. PSM, Alt. PSM or a binary mask with scattering bars. A water soluble negative tone photoresist is coated over the positive photoresist pattern and is exposed through a mask having small islands that correspond in shape, size and location to the small holes in the mask used to pattern the positive tone photoresist. After development, exposed negative tone photoresist covers sidelobes formed by the positive tone process. The negative tone photoresist functions as a mask for a subsequent etch transfer of the positive tone pattern into the substrate. A method of aligning openings in a positive tone pattern over the same openings in a negative tone pattern is also useful in preventing sidelobes in the positive tone photoresist from being transferred into the substrate.
Abstract:
In the manufacture of a semiconductor, a DBARC layer is deposited upon a wafer to prevent reflection. A photo resist layer is deposited upon the DBARC layer and the wafer is selectively exposed to irradiation. The irradiation generates photo acid (H+ ions) in the exposed areas of the photo resist and DBARC. In order to provide better resolution in the DBARC for micro-features, an electric field is generated vertically through the coated wafer before or during post exposure baking (PEB) to create a uniform vertical distribution of H+ ions though the DBARC. The coated wafer is then developed to remove either the unexposed portions, or exposed portion of the DBARC. The cavities formed by the developer have side walls that are substantially vertical as a result of the uniform vertical distribution of the H+ ions.
Abstract:
In the manufacture of a semiconductor, a DBARC layer is deposited upon a wafer to prevent reflection. A photo resist layer is deposited upon the DBARC layer and the wafer is selectively exposed to irradiation. The irradiation generates photo acid (H+ ions) in the exposed areas of the photo resist and DBARC. In order to provide better resolution in the DBARC for micro-features, an electric field is generated vertically through the coated wafer before or during post exposure baking (PEB) to create a uniform vertical distribution of H+ ions though the DBARC. The coated wafer is then developed to remove either the unexposed portions, or exposed portion of the DBARC. The cavities formed by the developer have side walls that are substantially vertical as a result of the uniform vertical distribution of the H+ ions.