Abstract:
PURPOSE: A capacitor fabrication method is provided to improve a contact resistance by using heavily doped and lightly doped polysilicon layers as a storage electrode. CONSTITUTION: The method comprises the steps of forming an insulating pattern(42) having contact holes(44) for storage node on a semiconductor substrate(30) having transistors; forming a heavily doped polysilicon layer(46) to fill the contact holes(44); and forming a lightly doped polysilicon layer(48) on the resultant structure; annealing the resultant structure using PH3 doping gas so as to diffuse the doping gas of the heavily doped polysilicon layer(46) into the contact hole(44), thereby decreasing the contact resistance of the contact hole(44); and growing HSG(hemi-spherical grain) layer(50) on the surface of the lightly doped polysilicon layer(48).
Abstract:
PURPOSE: A semiconductor device with an air gap between a semiconductor substrate and an L-type spacer is provided to reduce parasitic capacitance near a gate electrode by forming an air gap of a relatively low dielectric constant between the horizontal part of an L-type spacer formed on the sidewall of the gate electrode and a semiconductor substrate. CONSTITUTION: A source and a drain are formed in a semiconductor substrate(100), separated from each other. A gate pattern(200) is formed on a channel region between the source and the drain. An L-type spacer(151) includes a vertical portion(152) covering the sidewalls of the gate pattern and a lateral portion(153) extended from the lower part of the vertical portion wherein the lateral portion overlaps the source and the drain. A support portion(142) supplies an air gap to a gap between at least the lateral portion of the L-type spacer and the source/drain(170), interposed between the L-type spacer and the gate pattern.
Abstract:
반도체 기판과 "L"형 스페이서 사이에 에어 갭을 구비하는 반도체 소자 및 그 제조 방법을 제공한다. 반도체 기판에 서로 이격된 소오스 및 드레인이 형성된다. 상기 소오스 및 상기 드레인 사이의 채널 영역 상부에 게이트 패턴이 배치된다. 상기 게이트 패턴의 측벽들을 덮는 수직부 및 상기 수직부의 하부로부터 연장된 수평부로 구성되되, 상기 수평부가 상기 소오스 및 상기 드레인에 중첩된 "L"형 스페이서가 형성된다. 상기 "L"형 스페이서 및 상기 게이트 패턴 사이에 개재되어 적어도 상기 수평부 및 상기 소오스/드레인 사이에 에어 갭을 제공하는 지지부가 형성된다.
Abstract:
A method of manufacturing a semiconductor device is provided to simplify manufacturing processes and to improve productivity by forming a re-wiring pattern without a bonding pad plug process. A protection layer(230) is formed on a semiconductor substrate(200) with a first metal pattern(220). A bonding pad is provided by forming a first opening for exposing the first metal pattern to the outside in the protection layer. A second metal film is formed thereon. A reflow process is performed on the resultant structure to improve contact resistance between the first metal pattern and the second metal film and to improve the profile of the second metal film. A rewiring pattern(270) is electrically connected with the first metal pattern through the bonding pad on the second metal film. A stress lessening layer(280) is formed on the resultant structure. A bump pad is provided by forming a second opening for exposing partially the rewiring layer to the outside in the stress lessening layer.
Abstract:
PURPOSE: A method for forming a semiconductor transistor is provided to be capable of forming a lightly doped region and a heavily doped region by using a single notched gate pattern. CONSTITUTION: A notched gate pattern(155) having a relatively wide upper width is formed on a semiconductor substrate(100). By performing tilt ion-implantation processing using the notched gate pattern(155), a lightly doped impurity region(200) is formed in the substrate. A heavily doped impurity region is formed in the substrate by performing vertical ion-implantation processing using the notched gate pattern(155).
Abstract:
In a method of fabricating a metal oxide semiconductor (MOS) transistor with a lightly doped drain (LDD) structure without spacers, gate electrodes and spacers are formed on a semiconductor substrate. A high density source/drain region is formed using the gate electrodes and the spacers as masks. A low density source/drain region is formed after removing the spacers. It is possible to reduce the thermal stress of the low density source/drain region by forming the high density source/drain region before the low density source/drain region is formed and to increase an area, in which suicide is formed, by forming a structure without spacers. Also, it is possible to simplify processes of fabricating a complementary metal oxide semiconductor (CMOS) LDD transistor by reducing the number of photoresist pattern forming processes in the method.
Abstract:
MIM(Metal-Insulator-Metal)형 구조를 갖는 커패시터의 공정을 단순화시킬 수 있는 반도체 장치의 커패시터 제조방법에 관한 것이다. 반도체 기판 상에 제1 도전막을 형성하는 단계와 상기 제1 도전막을 패터닝하여 커패시터 영역을 한정하는 단계와 상기 제1 도전막 상에 층간절연막을 형성하는 단계와 상기 층간절연막을 패터닝하여 상기 층간절연막 내에 기준의 제1 개구부와 확장된 제2 개구부를 형성하는 단계와 상기 패턴화된 층간절연막 상과 상기 제1 도전막 상에 제2 도전막을 형성하여 상기 제1 개구부를 매립하면서 상기 제2 개구부를 콘포말하게 덮는 단계와 상기 제2 도전막 상에 유전막을 형성하는 단계와 상기 유전막과 상기 제2 도전막을 평탄화하여 상기 제1 개구부를 매립하는 플러그와 상기 제2 개구부의 프로파일을 따라 측면으로 고립되는 하부전극과 유전막 패턴을 형성하는 단계와 상기 결과물 상에 제3 도전막을 형성하는 단계와 상기 제3 도전막을 패터닝하여 상기 � ��러그 상에 제3 도전막 패턴과 상기 유전막 패턴의 프로파일을 따라 측면으로 고립되는 상부전극을 형성하는 단계를 구비하는 것이 특징이다. 제1 개구부와 제2 개구부를 동시에 형성하여 공정을 단순화하며, 양 측면의 유전막을 사용하여 커패시턴스를 향상시킨다.
Abstract:
PURPOSE: A method for fabricating a metal-oxide-semiconductor(MOS) transistor with a lightly-doped-drain(LDD) structure is provided to reduce thermal budget of a low density source/drain region by forming a high density source/drain region prior to the low density source/drain region, and to increase the area of silicide by forming a structure having no spacer. CONSTITUTION: A semiconductor substrate(110) is prepared. A gate electrode(140A,140B) is formed on the semiconductor substrate. A spacer is formed on both sidewalls of the gate electrode. The first impurity region(190) of the first density is formed in the semiconductor substrate at both sides of the spacer. The spacer is eliminated. The second impurity region(200) of the second density lower than the first density is formed in the semiconductor substrate at both sides of the gate electrode exposed when the spacer is removed.