Abstract:
PROBLEM TO BE SOLVED: To provide an ARC(antireflection coating) layer which effects more improved CD(critical dimension) control, so as to lessen a resist layer in reflectivity in a lithographic process. SOLUTION: This reduction method is carried out in a manner, where an antireflection coating layer 130 is deposited on a board 130, and a resist layer 170 is deposited on the ARC layer 130, where the ARC layer 130 is composed of a first section 135 and a second section 140, the first section 135 operates in an absorption mode, and the reflectivity of the second section 140 is so set as to reduce the reflectivity difference between the first section 135 and the resist layer 170.
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor device which has a stable contact resistance and also has an aligned maximum allowable contact region adapted to reduced fundamental dimensions. SOLUTION: A borderless contact 11 of giga-scale fundamental dimensions is spread in a direction perpendicular to word lines 14 (in a direction parallel to bit lines 16). Formation of a borderless contact structure of another square into a rectangular structure causes reduction of a step positional deviation, thus decreasing a contact resistance and keeping its uniformity. A maximum allowable contact region can be obtained even with a positionally shifted arrangement.
Abstract:
In the exposure and development of available deep ultraviolet (DUV) sensitive photoresist it has been observed that following the standard prior art methods of exposure and development results in a high density of undesirable pieces of components of the photoresist material, Blob Defects, remaining on the semiconductor substrate (body). A method of exposing and developing the photoresist material which results in a reduced incidence of these Blob Defects consists of introducing a low level uniform flood exposure of light in addition to the commonly used exposure to patterned light, followed by standard development. The flood exposure is in the range of 5 to 50 % of the dose-to-clear for a non-patterned exposure.
Abstract:
In the exposure and development of available deep ultraviolet (DUV) sensitive photoresist it has been observed that following the standard prior art methods of exposure and development results in a high density of undesirable remnants (denoted as Blob Defects) of various components of photoresist material remaining on the semiconductor substrate (body). A method of exposing and developing the photoresist material which results in a reduced incidence of these Blob Defects consists of using a Puddle Development technique to develop the photoresist material, and subsequently exposing the semiconductor wafer to at least one Puddle Rinse cycle which uses water.
Abstract:
Post-development defects in the manufacture of semiconductor devices through the use of surfactants, suchas ammonium lauryl sulfate, incorporated in the rinse water or the developer for the resist. The surfactants effectively remove resist defects in or around the resist pattern without attacking the resist itself.
Abstract:
A method for forming a dual damascene structure, employs the steps of forming a dielectric layer (14), patterning a first resist layer (16) on the dielectric layer to form a via pattern (26) and patterning a second resist layer (28) to form a line pattern (38) in communication with the via pattern formed on the first resist layer wherein the first resist layer includes exposed portions adjacent to the via pattern. The first resist layer, the second resist layer and the dielectric layer are etched such that the dielectric layer has a via (40) formed therein which gets deeper during the etching process. The dielectric layer has a trench (42) formed therein in communication with the via which gets deeper after the exposed portions of the first resist layer are consumed by the etching process.
Abstract:
An ARC that reduces the reflectivity in the resist is described. The ARC comprises first and sections. The first section operates in the absorption mode and the second section reduces the difference in the refractive indices between the resist and first ARC section, thereby improving CD control.