Abstract:
A method for forming a metal wiring layer in a semiconductor device using a dual damascene process is provided. A stopper layer, an interlayer insulating layer, and a hard mask layer are sequentially formed on a semiconductor substrate having a conductive layer. A first photoresist pattern that comprises a first opening having a first width is formed on the hard mask layer. The hard mask layer and portions of the interlayer insulating layer are etched using the first photoresist pattern as an etching mask, thereby forming a partial via hole having the first width. The first photoresist pattern is removed. An organic material layer is coated on the semiconductor substrate having the partial via hole is formed to fill the partial via hole with the organic material layer. A second photoresist pattern that comprises a second opening aligned with the partial via hole and having a second width greater than the first width is formed on the coated semiconductor substrate. The organic material layer and the hard mask layer on the interlayer insulating layer are etched using the second photoresist pattern as an etching mask. The second photoresist pattern and the organic material layer are simultaneously removed. A wiring region having the second width and a via hole having the first width are formed by etching the interlayer insulating layer using the hard mask layer as an etching mask.
Abstract:
PURPOSE: A method and an apparatus for removing a photoresist formed on an interlayer dielectric of a semiconductor device are provided to maintain a dielectric constant of the interlayer dielectric after an ashing process is performed on the photoresist formed on the interlayer dielectric. CONSTITUTION: An interlayer dielectric of a low dielectric constant is formed on a surface of a semiconductor substrate(S1). A photoresist is coated on an upper portion of the interlayer dielectric(S2). A contact hole is formed by patterning the photoresist and the interlayer dielectric(S3). The photoresist is removed by performing an ashing process for the photoresist and the interlayer dielectric is exposed thereby(S4). The interlayer dielectric is contacted with activated hydrogen by performing an activated hydrogen process(S5). A post-process such as a stripping process is performed(S6). The interlayer dielectric is formed by an SiOC:H-based compound. The activated hydrogen includes hydrogen plasma.
Abstract:
PURPOSE: A method for fabricating a dual damascene wire of a microelectronic device using a hybrid type low-k dielectric material and a carbonless organic filling material is provided to prevent the delay of an RC signal and restrict the interference between signals and the increase of power consumption by forming an interlayer dielectric with the low-k dielectric material. CONSTITUTION: A hybrid type insulating layer(130) having a dielectric constant below 3.3 is formed on a substrate(100). A via(150) is formed within the hybrid type insulating layer(130). The via(150) is filled by a carbonless organic filling material(160). A trench(190) is formed by etching the carbonless organic filling material(160) and the hybrid type insulating layer(130). The remaining carbonless organic filling material is removed from the via(150). A wire is formed by filling up a wire material into the trench(190) and the via(150).
Abstract:
PURPOSE: A method for manufacturing a semiconductor device using dual damascene technology is provided to prevent an over-etch of a lower interconnection by using an etch stopping layer composed of an N-doped SiC layer. CONSTITUTION: An etch stopping layer(23) and an interlayer dielectric(26) are sequentially formed on a semiconductor substrate(100) having a lower conductive layer(20). A via hole(30) is formed to expose the etch stopping layer(23) by selectively etching the interlayer dielectric. A second photoresist pattern(32) is formed to expose portions of the interlayer dielectric(26) on the resultant structure. At this time, a photoresist residue(34) is remaining in the via hole. A groove(36) is formed by etching the exposed interlayer dielectric(26) using the second photoresist pattern(32) and the photoresist residue(34) as a mask. After removing the second photoresist pattern(32) and the photoresist residue(34), the surface of the lower conductive layer(20) is exposed by removing the exposed etch stopping layer(23). An N-doped SiC layer is used as the etch stopping layer(23).
Abstract:
PURPOSE: A method for manufacturing a dual damascene is provided to reduce the thickness of photoresist used as an etch mask for forming a via pattern, by forming an anti-reflective coating(ARC) along the bending of an interconnection pattern. CONSTITUTION: An interlayer dielectric is formed on a substrate(200) where an electrical active region(201) is buried. The first photoresist pattern exposing the upper portion of the electrical active region is formed on the interlayer dielectric. A part of the ARC(206) and the interlayer dielectric is etched to form the interconnection pattern by using the first photoresist pattern as an etch mask. The first photoresist pattern is eliminated. An ARC is formed on the resultant structure having the interconnection pattern. The second photoresist pattern opening a part of the groove of the interconnection pattern is formed on the ARC. The interlayer dielectric is etched to form a via pattern reaching the electrical active region by using the second photoresist pattern as an etch mask. The second photoresist pattern is removed. The groove of the interconnection pattern and the via pattern formed by the abovementioned process is filled with a metal material.
Abstract:
낮은 유전상수를 갖는 비정질 실리콘 카바이드 조성물 및 그 형성방법이 제공된다. 이 조성물은 규소(Si), 탄소(C), 수소(H) 및 질소(N)를 포함하되, 질소의 조성비는 규소, 탄소, 수소 및 질소의 총원자량을 기준으로 2 내지 10 원자량(atomic )이고, Si-CH 3 결합 및 Si-C 결합을 포함한다. 이 조성물을 형성하기 위한 방법은 밀폐된 공정챔버 내의 척 상에 반도체기판을 로딩시키는 단계와, 공정챔버 내의 압력을 대기압보다 낮은 저압으로 조절함과 동시에 척의 온도를 300℃ 내지 450℃의 온도로 조절하는 단계와, 공정챔버 내부로 트라이 메틸 사일레인(tri-methyl-silane; SiH(CH 3 ) 3 ) 가스와 같은 전구체(precursor) 및 운송가스(carrier gas)로서 질소가스를 주입함과 동시에 공정챔버 내의 전극에 플라즈마 소스로서 라디오 주파수 전원을 인가하여, 반도체기판 상에 비정질 실리콘 카바이드막을 형성하는 단계를 포함한다.
Abstract:
PURPOSE: A method for forming copper wiring layer is provided to prevent a lifting phenomenon of a dielectric layer during a chemical mechanical polishing(CMP) process by performing on Argon(Ar) sputter etching in-situ after forming a copper wiring layer and before a dielectric layer is formed with a nitride, eliminating entirely an oxide layer grown on the surface of a copper wiring layer and improving an adhesive strength between the copper wiring layer and the dielectric layer deposited thereon. CONSTITUTION: A process forms a copper wiring layer on the top of a semiconductor substrate. The process eliminates an oxide layer is grown on the surface of the copper wiring layer by using an Argon(Ar) sputter etching. The process deposits a dielectric layer on the results. The Argon(Ar) sputter etching is performed on the depositing of the dielectric layer. After the Argon(Ar) sputter etching, the process further includes an ammonia(NH3) plasma treatment processing on the surface of the copper wiring layer.
Abstract:
PURPOSE: A shallow trench isolation method is provided to prevent a nitride layer liner from being clipped and to embody a good gap filling of a high density plasma oxide layer, by making an upper corner portion of a trench not broken and have a good profile. CONSTITUTION: A pad oxide layer(102) and a nitride layer(104) are sequentially formed on a semiconductor substrate(100). The nitride layer, the pad oxide layer and the semiconductor substrate are etched to form a trench(108). A nitride layer liner(112) is deposited on the resultant structure. A high density plasma oxide layer(114) is firstly deposited on the resultant structure to bury a part of the trench. A high density plasma oxide layer is secondly deposited to completely bury the trench. A D/S ratio is not less than 5.9 in the first deposition step of the high density plasma oxide layer(DS ratio is (deposition rate+sputtering etch rate)/(sputtering etch rate)).