Abstract:
Methods for manufacturing a node of a stacked capacitor are provided. A first dielectric layer having a contact plug therein is formed on an integrated circuit substrate. A second dielectric layer including a storage node hole adjacent the contact plug is formed on the first dielectric layer. A conductive layer is deposited into the storage node hole and on the second dielectric layer. The conductive layer on the second dielectric layer is removed to provide a conductive storage node in the storage node hole. After the conductive layer on the second dielectric layer is removed, the conductive storage node is heat treated to reflow the conductive storage node before additional layers are formed on the conductive storage node.
Abstract:
PURPOSE: A capacitor of a semiconductor device including an anti-oxidation layer and a fabricating method therefor are provided to prevent the oxidation of a contact plug by forming the anti-oxidation layer between a storage electrode and the contact plug. CONSTITUTION: A capacitor of a semiconductor device including an anti-oxidation layer includes a conductive contact plug(300), a storage electrode, an anti-oxidation layer(400), a dielectric layer(700), and a plate electrode(800). The conductive contact plug(300) is formed on an upper surface of a semiconductor substrate(100). The storage electrode is electrically connected to the conductive contact plug(300). The anti-oxidation layer(400) is used for insulating a boundary between the storage electrode and the conductive contact plug(300) and preventing the oxidation of the conductive contact plug(300). The dielectric layer(700) is formed on the storage electrode. The plate electrode(800) is formed on the dielectric layer(700).
Abstract:
PURPOSE: A method for fabricating a capacitor of a semiconductor device is provided to reduce impurities remaining on a lower electrode or in a high dielectric layer, by performing an ozone or plasma annealing process as a pre-treatment process after the lower electrode is formed or by performing an ozone or plasma annealing process as a post-treatment process after the high dielectric layer is formed. CONSTITUTION: The lower electrode is formed on a semiconductor substrate(1). A pre-treatment process is performed regarding the lower electrode. A dielectric layer is formed on the lower electrode. The dielectric layer is annealed in an atmosphere of an oxygen radical or plasma, and a post-treatment process is performed. An upper electrode is formed on the post-treated dielectric layer. The pre-treatment process, the process for forming the dielectric layer and the post-treatment process are performed in the same chamber.
Abstract:
PURPOSE: A method for fabricating a capacitor of a semiconductor device using an agglomeration preventing layer is provided to prevent a thin film from being disconnected, by preventing a lower electrode material from being agglomerated in performing a heat treatment process regarding a lower electrode. CONSTITUTION: The lower electrode(210) is formed on a semiconductor substrate(200). The agglomeration preventing layer(220) for preventing agglomeration of the lower electrode is formed on the lower electrode. A heat treatment process is performed regarding the lower electrode. The agglomeration preventing layer is eliminated. A dielectric layer is deposited on the lower electrode. A heat treatment process is performed regarding the dielectric layer and is crystallized. An upper electrode is formed on the dielectric layer.
Abstract:
본 발명은 스텝 커버리지와 스루풋을 향상시킬 수 있는, 2단계 증착공정에 의한 금속산화막을 형성하는 방법 및 이를 이용한 반도체 캐패시터의 제조방법에 관한 것이다. 본 발명의 금속산화막을 형성하는 방법은 하부막상에 1차 금속 산화막을 저온 혹은 저압 공정을 수행하여 증착하는 단계와; 상기 1차 금속 산화막상에 상기 1차 탄탈륨 산화막의 증착조건에 비해 상대적으로 고온 혹은 고압 공정을 수행하여 2차 탄탈륨 산화막을 증착하는 단계를 포함한다. 상기 하부막은 폴리실리콘막이고 상기 금속막은 탄탈륨 산화막인 경우, 상기 1차 탄탈륨 산화막의 저온증착 공정은 420~460℃에서 수행되고 저압증착공정은 0.3-3 Torr 의 압력에서 수행되며, 상기 2차 탄탈륨 산화막의 고온증착 공정은 460~500℃에서 수행되고 고압증착공정은 3-5 Torr 의 압력에서 수행된다. 상기 하부막은 금속막이고 상기 금속 산화막은 탄탈륨 산화막인 경우, 상기 1차 탄탈륨 산화막의 저온증착 공정은 350~450℃에서 수행되고 저압증착공정은 0.01-2 Torr 의 압력에서 수행되며, 상기 2차 탄탈륨 산화막의 고온증착 공정은 400~500℃에서 수행되고 고압증착공정은 0.1-10 Torr 의 압력에서 수행된다.
Abstract:
PURPOSE: A method for manufacturing a ruthenium layer by a chemical vapor deposition(CVD) method while varying a process condition is provided to improve step coverage and surface morphology, by initially depositing a ruthenium layer of which a nuclear formation rate is faster than a growth rate, and by afterwards depositing a ruthenium layer of which the growth rate is faster than the nuclear formation rate. CONSTITUTION: While the pressure inside a deposition chamber is maintained at the first pressure and the flow rate of oxygen gas is maintained at the first flow rate, a ruthenium layer is deposited. While the pressure inside the deposition chamber is maintained at the second pressure and the flow rate of oxygen gas is maintained at the second flow rate, a ruthenium layer is deposited. The first pressure is higher than the second pressure, and the first flow rate is greater than the second flow rate.
Abstract:
PURPOSE: A method for forming a lower electrode of a concave type capacitor is to optionally form a lower electrode only inside a concave using a bottom layer and a spacer within the concave so that a series of processes for forming the lower electrode is removed and a total process is simplified. CONSTITUTION: An interlayer dielectric(24) is formed on a semiconductor substrate(22). On the interlayer dielectric is formed the first faster growth layer(FGL)(26) acting as a bottom layer of a concave. Each of the interlayer dielectric and the first FGL are patterned to expose the surface of the substrate so that a contact hole is formed. In the contact hole is formed a plug(28) for connecting between the substrate and the lower electrode. On the resultant structure formed a mold layer(30) for forming the lower electrode pattern. The mold layer is patterned to form a concave for the lower electrode pattern. On the side of the concave is provided a spacer(32) consisting of the second faster growth layer. On the resultant structure is deposited a conductive layer(34) for the lower electrode and thereby the lower electrode is formed inside the concave.
Abstract:
PURPOSE: A method for manufacturing a high dielectric layer of a semiconductor device is provided to control growth of a protrusion in the high dielectric layer and to form a uniform surface of the high dielectric layer, by alternatively supplying different oxidation gas. CONSTITUTION: The first gas composed of source gas and oxygen atoms only which are need to form a high dielectric layer(40) is supplied to a substrate(10) to form the first thin film(22) on the substrate. The second gas composed of at least one of a group composed of N2O, O2, O3, NOx, N2 and Ar includes at least one atom except an oxygen atom, and is supplied to the surface of the first thin film together with the source gas to evaporate the second thin film(24). The processes for evaporating the first and second thin films are repeated at least twice.
Abstract:
PURPOSE: A method for manufacturing a capacitor of a semiconductor device is provided to decrease a leakage current by reducing impurities remaining in a storage electrode or high dielectric layer. CONSTITUTION: A dielectric layer is formed on a storage electrode. The dielectric layer is annealed in an atmosphere of oxygen radical or plasma, and is after-treated. A plate electrode is formed on the after-treated dielectric layer. The deposition of the dielectric layer and the after-treatment are peformed in the same chamber. The oxygen radical atmosphere is an acid atmosphere containing ozone.
Abstract:
PURPOSE: A method for cleaning a wafer is provided, which can remove a film formation solution coated on a front surface and a back surface edge part of the wafer while forming a ferroelectric using a Sol-Gel method. CONSTITUTION: According to the method, a PZT(PbZrTiO3) solution coated on a front surface edge part of the wafer(11) is removed with a DI(Deionized) water, and a PZT solution coated on a back surface edge part is removed with an IPA(IsoProphyl Alcohol). Thus, particles can be prevented which are generated during a high temperature annealing process and following processes. The method includes a step of coating a solution containing a component of a film to be formed as a dielectric film on the wafer(11), and a step of rinsing the wafer(11) coated with the solution containing a ferroelectric.