摘要:
A method for forming a series of patterned planarized aperture fill layers within a series of apertures within a topographic substrate layer employed within a microelectronics fabrication. There is first provided a topographic substrate layer employed within a microelectronics fabrication, where the topographic substrate layer comprises a series of mesas of substantially equivalent height but of differing widths and the series of mesas is separated by a series of apertures. There is then formed upon the topographic substrate layer a blanket first aperture fill layer. The blanket first aperture fill layer is formed employing a first simultaneous deposition and sputter method. The blanket first aperture fill layer fills the series of apertures to a planarizing thickness at least as high as the height of the mesas while simultaneously forming a series of protrusions of the blanket first aperture fill layer corresponding with the series of mesas, where the thickness of a protrusion of the blanket first aperture fill layer over a narrow mesa is less than the thickness of a protrusion of the blanket first aperture fill layer over a wide mesa. The first simultaneous deposition and sputter method employs a first deposition rate:sputter rate ratio which provides sufficient thickness of the blanket first aperture fill layer over the narrow mesa such that upon chemical mechanical polish (CMP) planarizing the blanket first aperture fill layer to form a series of patterned planarized first aperture fill layers within the series of apertures erosion of the narrow mesa is attenuated. Finally, there is then chemical mechanical polish (CMP) planarized the blanket first aperture fill layer to form the series of patterned planarized first aperture fill layers within the series of apertures.
摘要:
A method for forming a semiconductor device utilizing a chemical-mechanical polishing (CMP) process is provided. In one example, the method includes sequentially performing a first CMP process for removing a first portion of an oxide surface of a semiconductor device using a high selectivity slurry (HSS) and a first polish pad, interrupting the first CMP process, cleaning the semiconductor device and the first polish pad, and performing a second CMP process for removing a second portion of the oxide surface.
摘要:
Within a method for forming an aperture fill layer within an aperture there is first provided a topographic substrate which has formed therein a pair of mesas which defines an aperture. There is then formed over the topographic substrate and into the aperture a blanket aperture fill layer while employing a high density plasma chemical vapor deposition (HDP-CVD) method, where the blanket aperture fill layer is formed to a thickness greater than a depth of the aperture while forming a pair of protrusions over the pair of mesas. There is then etched, while employing a sputter etch method, the blanket aperture fill layer to form an etched blanket aperture fill layer such that the pair of protrusions of the blanket aperture fill layer formed over the pair of mesas is etched more rapidly than a portion of the blanket aperture fill layer formed within the aperture. Finally, there is then chemical mechanical polish (CMP) planarized the etched blanket aperture fill layer to form a patterned planarized aperture fill layer within the aperture while removing the pair of protrusions form over the pair of mesas. The method may be employed to form with enhanced planarity and attenuated residue formation a trench isolation region within an isolation trench within a semiconductor substrate employed within a semiconductor integrated circuit microelectronic fabrication.
摘要:
A new method of forming a non-shrinkable metal passivation layer that will eliminate metal voiding and improve electromigration lifetime of the integrated circuit device is described. Semiconductor device structures are provided in and on a semiconductor substrate and covered by an insulating layer. A metal layer is deposited overlying the insulating layer and patterned to form metal lines wherein there is a gap between two of the metal lines. A non-shrinkable passivation layer is formed according to the following steps: 1) a HDP-CVD oxide layer is deposited overlying the metal lines wherein the gap is filled by the HDP-CVD oxide layer. 2) A silicon nitride layer is deposited by plasma-enhanced chemical vapor deposition overlying the HDP-CVD oxide layer. Or, 1) a PECVD oxide layer is deposited over the metal lines. 2) A silicon nitride layer is deposited by PECVD over the oxide layer to fill the gap and complete the passivation. Then, the fabrication of the integrated circuit device is completed. Completion of fabrication includes thermal processing. Voids are not formed within the metal lines because the non-shrinkable passivation layer does not shrink during the thermal processing.
摘要:
A process for forming a composite, interlevel dielectric, (ILD), layer, for MOSFET devices, has been developed. The composite ILD layer is comprised with an underlying, undoped silicon glass layer, providing the material needed to fill the narrow spaces between polysilicon gate structures of the MOSFET devices. A P2O5 doped, insulator layer, is next formed on the underlying, undoped silicon glass layer, to provide a mobile ion gettering property. An overlying, undoped silicon glass layer is then deposited and subjected to a chemical mechanical polishing procedure, resulting in the desired planar top surface topography, for the composite ILD layer.
摘要:
This invention relates to the fabrication of integrated circuit devices and more particularly to a method for forming and then later removing a silicon oxynitride, SiON, anti-reflection coating (ARC) over a semiconductor substrate, for the purpose of enhancing the resolution of photolithographically defined sub-micron polysilicon gates. The problem addressed by this invention is that the SiON ARC must first be used to reduce optical reflection from a blanket polysilicon surface, during the photolithography exposure step that defines the sub-micron polysilicon gate features, and then the ARC must be removed by a wet etch process that will not chemically attack the gate oxide under the polysilicon gate features or any exposed polysilicon surfaces. This is accomplished with a fabrication method that uses hot phosphoric acid (H3PO4) to preferentially etch the SiON ARC, relative to the thermal gate oxide, while also using thin thermal oxide layers to protect the polysilicon gate surfaces from being severely attacked by the hot H3PO4. This new method also features the ability to tailor the combination of the composition and thickness of the SiON layer and the thickness of the underlying protective thin thermal oxide layer, in order to minimize the undesired high optical reflectivity of the underlying polysilicon surface.
摘要:
There is provided a method for smoothing the surface of undoped polysilicon regions of a CMOS structure, primarily gate regions. A direct HPD-CVD argon sputter is used improve the surface roughness by a factor of more than 50%. The argon plasma sputter may be used either alone or in conjunction with a thin capping layer of oxide, nitride or oxynitride. The devices manufactured using the process exhibit excellent electrical characteristics and improved reliability compared to devices made using conventional manufacturing processes.
摘要:
A method for forming a planarized trench fill layer within a trench within a substrate. There is first provided a substrate having a trench formed therein. There is then formed over the substrate and at least partially filling the trench a first trench fill layer formed employing a high density plasma chemical vapor deposition (HDP-CVD) method. There is then formed upon the first trench fill layer a second trench fill layer formed employing a subatmospheric pressure thermal chemical vapor deposition (SACVD) method employing ozone as an oxidant source material and tetraethylorthosilicate (TEOS) as a silicon source material. Finally, there is then planarized by employing a chemical mechanical polish (CMP) planarizing method the second trench fill layer and the first trench fill layer to form a patterned planarized trench fill layer within the trench. When employing the method, the first trench fill layer is formed to a first thickness and the second trench fill layer is formed to a second thickness, where the first thickness and the second thickness are chosen such that there is attenuated erosion of the substrate when forming the patterned planarized trench fill layer within the trench while employing the chemical mechanical polish (CMP) planarizing method. The method is particularly useful for forming patterned planarized trench fill dielectric layers within isolation trenches within semiconductor substrates employed within semiconductor integrated circuit microelectronics fabrications.
摘要:
A method for filling shallow trenches 28 with a HDPCVD oxide 50. The invention has two liners: (a) a thermal oxide liner 36 and (b) an overlying conformal O.sub.3 -TEOS protective liner 40. The O.sub.3 -TEOS protective liner 40 prevents the HDPCVD oxide 50 from sputter damaging the trench sidewalls and the masking layer 24. The O.sub.3 -TEOS layer has novel process temperature (400 to 560.degree. C.) and low pressure (40 to 80 torr) that allows the O.sub.3 -TEOS layer to deposit uniformly over thermal oxide liner 36. The method begins by forming pad oxide layer 20 and a barrier layer 24 over a substrate. A trench 28 is formed in the substrate 10 through the pad oxide layer 20 and the barrier layer 24. A thermal oxide liner 36 and a protective O.sub.3 -TEOS liner layer 40 are formed over the walls of the trench 28 and over the barrier layer 24. Lastly, a high density plasma chemical vapor deposition (HDPCVD) oxide layer 50 is formed over the protective liner layer 40 filling the trench 28.
摘要:
A test region layout for testing shallow trench isolation gap fill characteristics is disclosed. Each test region further comprises at least one test pattern disposed in an interior portion of the test region. In a preferred embodiment, the test pattern is a square shape or, more preferably, two diametrically opposed “L” shapes which are discontinuous with respect to each other. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.