Abstract:
PURPOSE: A CMP(chemical mechanical polishing) process monitoring pattern with a dummy pattern is provided to improve reliability of a measured value and represent a process result of a cell part by preventing a process monitoring pattern from being eroded in a scribe line. CONSTITUTION: A semiconductor substrate includes a cell part, a peripheral circuit part and a scribe line part(A3). A CMP process monitoring pattern has a measuring pattern(B3) and a dummy pattern(C2) in the scribe line. The measuring pattern measures a thickness, and the dummy pattern surrounds the measuring pattern. The dummy pattern has a size greater than a planarization interval from the measuring pattern. The dummy pattern has the same pattern as a cell area.
Abstract:
PURPOSE: A method for cleaning a semiconductor substrate is provided to prevent the generation of watermarks by using the hydrophilic solution to clean the semiconductor substrate having an exposed hydrophobic layer. CONSTITUTION: A semiconductor substrate is loaded by a load station(S410). The semiconductor substrate is rinsed in the first station by using deionized solution and the residual particles are removed from the semiconductor substrate by using a brush(S420). The semiconductor substrate is cleaned in the second station by using the chemical solution(S430). The semiconductor substrate is cleaned in the third station by using the volatile solution(S440). The cleaned semiconductor substrate is unloaded to the next process(S450).
Abstract:
화학 기계적 연마 이후의 구리층 부식을 방지하는 반도체 장치 제조 방법 및 이에 이용되는 화학 기계적 연마 장치를 개시한다. 본 발명의 일 관점은 구리층이 형성된 웨이퍼를 화학 기계적 연마 장치에서 연마한 후 세정 장치로 이송하기 위해서 대기할 때, 대기 위치에 모여진 웨이퍼들에 부식 방지제가 함유된 용액을 제공하여 적어도 연마된 구리층 표면이 용액으로 웨팅(wetting)된 상태로 유지되도록 한다. 이후에, 대기 위치에 모아진 웨이퍼들을 세정 장치로 이송하여 세정한다. 이때, 용액은 순수에 부식 방지제를 첨가한 용액을 이용하고, 부식 방지제는 바람직하게 벤조트리아졸(benzo-tri-azole)을 이용한다. 또한, 상기한 웨이퍼들의 이송 시에도 이송되는 웨이퍼들의 표면은 부식 방지제를 포함하는 용액으로 웨팅된 상태를 유지한다. 그리고, 이러한 방법을 수행하는 화학 기계적 연마 장치를 제공한다. 본 발명에 따르면, 화학 기계적 연마 이후에 연마된 구리층이 부식되는 것을 방지할 수 있다.
Abstract:
PURPOSE: A method of fabricating a semiconductor device for preventing corrosion of a cooper layer after a CMP(Chemical Mechanical Polishing) process and a CMP apparatus used for the same are provided to prevent corrosion of a cooper layer after a CMP process by using an anti-corrosion solution. CONSTITUTION: An interlayer dielectric(200) is formed on a wafer(100). A trench is formed on the interlayer dielectric(200). A copper layer(300) is filled into the trench(250). The cooper layer(300) is patterned by performing a CMP process. An anti-corrosion solution(600) is supplied on a surface of the copper layer(300). BTA(Benzo-Tri-Azole) is included in the anti-corrosion solution(600). A polymer complex layer is formed on the surface of the cooper layer(300) by reacting the BTA with the surface of the cooper layer(300). The polymer complex layer is operated as a mechanical and electrochemical barrier layer.
Abstract:
PURPOSE: A conditioning reagent for the pad of copper CMP is provided, to remove the pollutant substances(copper oxides) resided on the pad effectively after the copper CMP process. CONSTITUTION: The conditioning reagent(120) comprises an organic acid comprising a carboxyl group; an anionic surfactant; optionally a polymeric surfactant; and the balance of deionized water. Preferably the organic acid is formic acid, acetic acid or citric acid. Preferably the anionic surfactant is sodium dodecyl sulfate, sodium stearate, sodium dodecyl benzene sulfonate or sodium oleate. The ratio of the organic acid to the deionized water is 1000:1 to 10:1, and the content of the anionic surfactant is 0.0001 to 10 M/l.
Abstract:
PURPOSE: A method of cleaning a pad is to remove copper oxides remaining on the pad, without causing damage to the pad, when performing a CMP(chemical mechanical polishing) process using copper. CONSTITUTION: A wafer is loaded onto a table(1) and then polished using a CMP process. After the polishing process is completed, a pad cleaning process is started. When performing the pad cleaning process, a cleaning solution is supplied from a cleaning solution tank(4) to the table through a tube(3). The cleaning solution comprises NH4OH or diluted acid such as citric acid. The cleaning solution dissolves copper oxides such as Cu2O and CuO which are adhered to the pad, thus removing them from the pad.