Abstract:
Performance of the high resistance resistor, which is polysilicon, is improved by treating the surface of the polysilicon layer in mixed signal integrated circuits for ADSL (Asymmetric Digital Subscriber Line) broadband service application. This treated surface of the polysilicon layer will prevent ions in the resistor from out-diffusion when performing an annealing step after forming the resistor.
Abstract:
A method of fabricating shallow trench isolation. A silicon oxide layer is formed on a substrate. The silicon oxide layer is patterned and a portion of the substrate is removed to form a trench within the substrate. A liner oxide layer is formed on the sidewall of the trench. An insulating layer is formed on the substrate and filled in the trench. A portion of the insulating layer is removed by CMP to expose the silicon oxide layer. The silicon oxide layer is removed and the STI structure is completed.
Abstract:
The invention provides a chemical-mechanical polishing pad, which includes a plurality of annular grooves and a plurality of streamline grooves designed according to principles of the hydrodynamics. The streamline grooves of polishing pad are designed according to flow equations derived from source flow and vortex flow, and the streamline grooves of polishing pad uniformly distribute the slurry on the polishing pad. An angle and a depth of the streamline groove, which are calculated by boundary layer effect of the streamline groove function, are used to design an optimum structure for polishing pad.
Abstract:
A method for preventing the occurrence of poisoned trenches and vias in a dual damascene process that includes performing a densification process, such as an electron-beam process, on the surface of the exposed dielectric layer around the openings before the openings are filled with conductive material. The densified surface of the dielectric layer is able to efficiently prevent the occurrence of poisoned trenches and vias caused by the outgassing phenomena.
Abstract:
A chemical-mechanical polishing process includes the steps of providing a semiconductor substrate having a first conductive line thereon, and then forming at least one dielectric layer over the substrate and the first conductive line. Next, a chemical-mechanical polishing method is used to polish the surface of the dielectric layer. Thereafter, a cap layer is formed over the polished dielectric layer. The method of forming the cap layer includes depositing silicon oxide using a chemical vapor deposition method with silicane (SiH4) or tetra-ethyl-ortho-silicate (TEOS) as the main reactive agent. Alternatively, the cap layer can be formed by depositing silicon nitride using a chemical vapor deposition method with silicane or silicon dichlorohydride (SiH2Cl2) as the main reactive agent. Finally, a via opening is formed through the dielectric layer and the cap layer, and a second conductive line that couples electrically with the first conductive line through the via opening.
Abstract:
A chemical-mechanical polishing process for forming a conductive interconnect includes the steps of providing a semiconductor substrate having a first conductive line thereon, and then forming at least one dielectric layer over the substrate and the first conductive line. Next, a chemical-mechanical polishing method is used to polish the surface of the dielectric layer. Thereafter, a cap layer is formed over the polished dielectric layer. The method of forming the cap layer includes depositing silicon oxide using a chemical vapor deposition method with silicane (SiH.sub.4) or tetra-ethyl-ortho-silicate (TEOS) as the main reactive agent. Alternatively, the cap layer can be formed by depositing silicon nitride using a chemical vapor deposition method with silicane or silicon dichlorohydride (SiH.sub.2Cl.sub.2) as the main reactive agent. Finally, a via opening is formed through the dielectric layer and the cap layer, and a second conductive line that couples electrically with the first conductive line through the via opening.
Abstract:
An auto brush pressure cleaning system is described. The system includes a first pneumatic brush, a second pneumatic brush disposed to align with the first pneumatic brush adjacent and parallel to the first pneumatic brush, and a computer. The system also includes a first brush pressure regulator electrically coupled to the computer and transmitting a first and a second signal to the computer and a second brush pressure regulator coupled to the second pneumatic brush and the first brush pressure regulator through a first three-way valve and electrically coupled to the computer, wherein the second pneumatic brush transmits a third signal to the second brush pressure regulator and to the first brush pressure regulator and the second brush pressure regulator transmits a fourth signal to the computer. The system further includes a first electro-pressure regulator coupled to the first brush pressure regulator and the first pneumatic brush through a second three-way valve, wherein the first brush pressure regulator receives a fifth signal from the first pneumatic brush and a second electro-pressure regulator coupled to the second pneumatic brush and electrically coupled to the first electro-pressure regulator and the computer, wherein the computer transmits a sixth signal to the second and the first electro-pressure regulators.
Abstract:
A method of removing residual contaminants in grooves of an alignment mark of a semiconductor wafer after a chemical-mechanical polishing is disclosed. The method includes scrubbing the semiconductor wafer using conventional scrubbing technique. Next, the semiconductor wafer is etched back to remove a damaged layer, which is formed during the chemical-mechanical polishing, over the semiconductor wafer. Finally, the semiconductor wafer is cleaned, for example, by NH.sub.4 OH/H.sub.2 O.sub.2 /DI, agitated by a megasonic source, thereby substantially removing the residual contaminants from the alignment mark.
Abstract translation:公开了一种在化学机械抛光之后去除半导体晶片的对准标记的凹槽中残留污染物的方法。 该方法包括使用常规洗涤技术擦洗半导体晶片。 接下来,将半导体晶片回蚀刻以除去在化学机械抛光期间形成的受损层在半导体晶片上。 最后,例如通过NH 4 OH / H 2 O 2 / DI清洗半导体晶片,用兆声波源进行搅拌,从而基本上从对准标记中除去残留的污染物。
Abstract:
A chemical mechanical polishing machine and a fabrication process using the same. The chemical mechanical polishing machine comprises a retainer ring having a plurality of slurry passages at the bottom of the retainer ring. The retainer ring further comprises a circular path. By conducting the slurry through the slurry passages and the circular, a wafer is planarized within the chemical mechanical polishing machine.
Abstract:
A method for forming capacitor is proposed. The key point of the invention is that bottom plate and dielectric layer of capacitor are formed before metal interconnect is formed. Thus, thermal treatment of dielectric layer does not affect metal interconnect. Therefore, conventional fault that quality of dielectric layer is degraded by scant annealing is avoided, and then dielectric layer and metal interconnect can be optimized respectively. Obviously, the ultimate advantage of the proposed method is that not only breakdown voltage of dielectric layer is increased by annealing but also quality of metal interconnect is not affected by annealing. Therefore, an incidental advantage of the proposed method is that the method is beneficial to form both capacitor and metal interconnect.