Abstract:
본 발명의 전형적인 실시예는 폴리실리콘층의 화학기계적연마를 포함하는 공정에 사용할 수 있는 새로운 슬러리 조성물을 제공한다. 슬러리 조성물은 실리콘 산화물 및 실리콘 질화물에 대해 폴리실리콘 제거 속도를 감소하고 연마된 표면의 평탄도를 개선하기 위해서 노출된 폴리실리콘 표면 상에 패시베이션층을 선택적으로 형성할 수 있는 하나 또는 그 이상의 비이온성 폴리머 계면활성제를 포함한다. 전형적인 계면활성제는 에틸렌 산화물(EO)-프로필렌 산화물(PO) 블록 폴리머로 이루어진 알킬 및 아릴 알콜을 포함하고, 상기 계면활성제는 보다 작은 양이면 효과적이지만 5Wt%까지의 양으로 슬러리 조성물에 존재할 수 있다. 다른 슬러리 첨가제는 점도 조절제, pH 조절제, 분산제, 칠레이팅제, 및 아민 또는 이민 계면활성제를 포함하여 실리콘 질화물 및 실리콘 산화물의 상대적인 제거 속도를 조절한다.
Abstract:
PURPOSE: A CVD apparatus for fabricating an IC is provided to control a polishing degree of each part of a wafer by increasing or reducing a standby period of pad strips on the wafer. CONSTITUTION: A plate is used for fixing a semiconductor substrate. A polishing pad(320) includes a plurality of pad strips and is used for pressing the semiconductor substrate. A rotation unit(380) is used for rotating the polishing pad. A migration unit moves straightly a part of the pad strips. The polishing pad is formed with a circular shape. Each pad strip has a shape of a fan. The migration unit includes a motor(370), a screw(360) rotated by the motor, and a rod migrated by the rotation of the screw.
Abstract:
PURPOSE: A planarization method of a semiconductor device using a CMP(Chemical Mechanical Polishing) process is provided to be capable of uniformly polishing an insulating layer formed on the first and second lower patterns and minimizing the damage of the first and second lower patterns. CONSTITUTION: A semiconductor substrate is prepared. At this time, the semiconductor substrate includes the first lower patterns(106) having the first height(Ha) and the second lower patterns(106a) having the second height(Hb). An insulating layer is formed on the entire surface of the resultant structure. A planarization process is performed on the resultant structure by using a CMP apparatus having an etch end point detector until the upper surfaces of the second lower patterns are exposed.
Abstract:
PURPOSE: A method for forming a capacitor of a semiconductor device is provided to be capable of simplifying the forming process. CONSTITUTION: A mold insulating layer(107) and a hard mask(108) are sequentially formed at the upper portion of a semiconductor substrate(101). A plurality of holes(109a) are formed on the resultant structure by sequentially patterning the hard mask and the mold insulating layer. An storage node layer(110) is formed along the entire surface of the resultant structure. Then, a capping insulating layer(111) is formed at the upper portion of the storage node layer for completely filling the holes. A plurality of storage nodes and capping insulating patterns are formed at the inner portions of the holes by carrying out a planarization process on the resultant structure using a one-step CMP(Chemical Mechanical Polishing) process.
Abstract:
PURPOSE: A slurry supply apparatus used for a CMP(Chemical Mechanical Polishing) process is provided to be capable of preventing micro scratch from being generated at a wafer due to the large grains of slurry. CONSTITUTION: A slurry supply apparatus is provided with a supply pipe(200) for supplying slurry and a module(100) connected with the supply pipe for crushing the slurry flowed from the supply pipe. The module includes the first body part(120) having a through hole connected with the supply pipe, the second body part(130) located at the lower portion of the first body part, and a motor(150) for rotating the second body part. At this time, a gap(122) is formed between the first and second body part. Preferably, the module further includes a housing for enclosing the first and second body part. The housing includes a jet port for supplying the slurry flowed from the gap to a polishing pad.
Abstract:
플로팅 게이트를 스톱층으로 이용하여 CMP 공정을 통해 소자격리 영역의 절연막과 플로팅 게이트간의 단차를 감소시키는데 적당한 서로 다른 두께를 갖는 2가지 이상의 터널 절연막을 갖는 비휘발성 메모리 소자의 제조방법에 관한 것으로, 셀 트랜지스터와 외부전원 인가 및 주변회로 동작을 위한 트랜지스터를 갖는 소자에 있어서, 반도체 기판상에 서로 다른 두께를 갖는 2가지 이상의 터널 절연막과, 일정 간격을 갖는 도전층 그리고 제 1 절연막을 차례로 형성하는 제 1 단계와; 상기 형성된 결과물을 선택적으로 소정 깊이 식각 제거하여 트렌치를 형성하고, 상기 트렌치를 포함한 전체상부에 제 2 절연막을 증착하는 제 2 단계와; 상기 제 2 절연막이 상기 트렌치에만 남도록 하여 소자격리 영역을 형성하는 제 3 단계와; 상기 제 1 절연막을 제거한 후, 상기 도전층을 스톱층으로 이용하여 제 2 절연막을 선택적으로 제거하는 제 4 단계를 포함하여 이루어짐을 특징으로 한다.
Abstract:
PURPOSE: A method for forming a metal-oxide-semiconductor(MOS) transistor using a selective silicide process is provided to control a defect inside a silicon substrate in a silicide process by selectively forming a silicide layer only on a gate polysilicon layer, and to form a relatively thin interlayer dielectric covering the silicide layer by forming the silicide layer after an insulation layer is formed. CONSTITUTION: A gate insulation layer(410) and a gate polysilicon layer(420) are sequentially formed on the silicon substrate(400). A gate spacer(430) is formed on the sidewall of the gate insulation layer and the gate polysilicon layer. An impurity ion implantation process and a diffusion process are performed to form a source/drain region(440) in the substrate by using the gate spacer and the gate polysilicon layer as a mask. An etch stop layer(450) is formed to cover the source/drain region, the gate spacer and the gate polysilicon layer. An insulation layer(460) covering the etch stop layer is formed. The insulation layer is planarized to expose the etch stop layer on the gate polysilicon layer. Parts of the exposed etch stop layer and the gate spacer are etched to expose the upper surface and upper side surface of the gate polysilicon layer. The silicide layer(480) is selectively formed on the exposed portion of the gate polysilicon layer.
Abstract:
PURPOSE: A method for manufacturing a non-volatile memory device having at least two tunnel insulation layers of different thicknesses is provided to improve a hump phenomenon of a transistor caused by a recess of an insulation layer in an isolation region, by performing a chemical mechanical polishing(CMP) process using a floating gate as a stop layer. CONSTITUTION: At least two tunnel insulation layers(32) having different thicknesses, a conductive layer(33) of a predetermined interval and the first insulation layer are sequentially formed on a semiconductor substrate(31). A predetermined depth of the resultant structure is selectively etched to form a trench, and the second insulation layer(35) is formed on the resultant structure including the trench. The second insulation layer is left only in the trench to form the isolation region. After the first insulation layer is removed, the second insulation layer is selectively eliminated by using the conductive layer as a stop layer.
Abstract:
PURPOSE: A method of forming a via in a semiconductor device is to form an anchor via at an intermetal dielectric layer comprising an insulating layer of a low dielectric constant, without an overhang being generated. CONSTITUTION: A method of forming a via comprises the steps of: forming a first metal interconnect(100) formed of the first metal on a semiconductor substrate; forming a capping layer(102,104) on the metal interconnect; forming an intermetal insulating layer comprising an insulation layer(106) of a low dielectric constant on the capping layer; dry etching the intermetal insulating layer and the capping layer to form a via hole exposing the metal interconnect; forming a spacer(114) on a sidewall of the via hole; wet etching the metal interconnect exposed by the via hole to form an anchor hole(116) undercutting the capping layer; and burying a second metal into the via hole and the anchor hole to form a via plug(118).
Abstract:
PURPOSE: A chemical mechanical polishing apparatus is to prevent a semiconductor wafer from being polished non-uniformly due to physical and chemical variation of a polishing pad. CONSTITUTION: A chemical mechanical polishing apparatus comprises: a wafer carrier(3) which is rotatable and is able to mount a semiconductor wafer(1) such that the upper surface of the semiconductor wafer is directed to the lower direction; a polishing platen(7) including a variable part(7a) placed at a position corresponding to the lower portion of the wafer carrier and rotatable and partially movable in the up and down direction and a fixing part(7b); and a polishing pad(5) established on the polishing platen and in contact with one surface of the semiconductor wafer. The variable part of the polishing platen includes a moving unit, which allows the variable part to be movable in the up and down direction.