摘要:
A method for forming a dielectric layer within a microelectronics fabrication. There is first provided a microelectronics substrate layer employed within a microelectronics fabrication. There is then formed upon the microelectronics substrate layer a patterned microelectronics layer. There is then formed conformally over the patterned microelectronics layer a conformal silicon oxide dielectric layer formed employing a plasma enhanced chemical vapor deposition (PECVD) method employing silane as a silicon source material. The conformal silicon oxide dielectric layer comprises: (1) a first region formed over the upper surface of the patterned microelectronics layer; (2) a second region formed interposed between a series of patterns which comprises the patterned microelectronics layer and parallel with a series of sidewalls of the series of patterns which comprises the patterned microelectronics layer; and (3) a third region formed interposed between the series of patterns which comprises the patterned microelectronics layer but not parallel with the series of sidewalls of the series of patterns which comprises the patterned microelectronics layer. There is then treated with an oxygen containing plasma the conformal silicon oxide dielectric layer to enhance the rate of formation of a second silicon oxide dielectric layer upon the first region of the conformal silicon oxide dielectric layer with respect to at least the second region of the conformal silicon oxide dielectric layer. The second silicon oxide dielectric layer is formed employing an ozone assisted thermal chemical vapor deposition (CVD) method employing tetraethylorthosilicate (TEOS) as a silicon source material. Finally, there is then formed upon the oxygen containing plasma treated conformal silicon oxide dielectric layer the second silicon oxide dielectric layer, where the second silicon oxide dielectric layer defines, at least in part, a series of voids formed interposed between the series of patterns which comprises the patterned microelectronics layer.
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 forming a borderless, contact or via hole, has been developed, in which a thin silicon nitride layer is used as an etch stop to prevent attack of an underlying interlevel dielectric layer, during the opening of the borderless, contact or via hole, in an overlying, interlevel dielectric layer. The thin silicon nitride layer is the top layer of an interlevel dielectric composite layer, used between metal interconnect levels.
摘要:
A method is disclosed for forming copper damascene interconnects without the attendant CMP (chemical-mechanical polishing) dishing problem that is encountered in the art. This is accomplished by first lining the inside walls of a dual damascene structure with a diffusion barrier layer, and then depositing copper metal into the damascene structure. Secondly, as a key aspect of the invention, and before removing the excess copper either by conventional etching techniques-which is difficult for copper- or by conventional CMP- which causes dishing in grooves or trenches- an etch stop layer is deposited covering the copper layer. Portions of the etch stop layer is next removed from the high regions of the underlying copper by a quick first CMP so that other portions of the etch stop layer over the wider trenches/groove remain low and unaffected. The high regions now exposed are etched while the low regions protected by the etch-stop layer still remain unaffected. When the copper etching reaches a level below the level of the low regions, a global CMP is performed so that all of the excess copper is removed and the level of the copper especially over the wider trench areas reaches within very close proximity of the level of the insulation layer surrounding the copper damascene- and without dishing.
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 process for creating BPSG filled, shallow trench isolation regions, in a semiconductor substrate, has been developed. The process features the use of a BPSG layer with about 4 to 4.5 weight percent B.sub.2 O.sub.3, and about 4 to 4.5 weight percent P.sub.2 O.sub.5, in silicon oxide. This BPSG composition, when subjected to a high temperature anneal procedure, results in softening, or reflowing, of the BPSG layer, eliminating seams or voids, in the BPSG layer, that may have been present after BPSG deposition. The removal rate of BPSG, is lower than the removal rate of silicon oxide layer, in buffered HF solutions, thus allowing several buffered HF procedures to be performed without recessing of BPSG in the shallow trench. In addition this composition of BPSG performs as a gettering material for mobile ions, thus contributing to yield and reliability improvements, when used at the isolation region for MOSFET devices.
摘要翻译:已经开发了用于在半导体衬底中产生BPSG填充的浅沟槽隔离区的工艺。 该方法的特征在于在氧化硅中使用具有约4至4.5重量%的B 2 O 3和约4至4.5重量%的P 2 O 5的BPSG层。 当经过高温退火过程时,该BPSG组合物导致BPSG层的软化或回流,消除了在BPSG沉积后可能存在的BPSG层中的接缝或空隙。 BPSG的去除率低于缓冲HF溶液中氧化硅层的去除率,从而允许在浅沟槽中不进行BPSG的凹陷而执行几个缓冲的HF程序。 此外,BPSG的这种组合作为移动离子的吸气材料,当在MOSFET器件的隔离区域使用时,有助于提高产量和可靠性。
摘要:
A defect free intermetal dielectric, IMD, and method of forming the defect free IMD are described. The IMD uses spacers formed by means of etchback of a layer of spin-on-glass, SOG. In order to use an oxide layer formed by means of plasma enhanced tetra-ethyl-ortho-silicate, PE-TEOS, as part of the IMD an oxide cap layer formed using plasma enhanced chemical vapor deposition, PE-CVD, is used to isolate the SOG spacers from the PE-TEOS formed oxide layer. By isolating the PE-TEOS formed oxide layer from the SOG spacers a reliable and defect free IMD is achieved.
摘要:
The present disclosure provides a method including providing a semiconductor substrate and forming a first layer and a second layer on the semiconductor substrate. The first layer is patterned to provide a first element, a second element, and a space interposing the first and second elements. Spacer elements are then formed on the sidewalls on the first and second elements of the first layer. Subsequently, the second layer is etched using the spacer elements and the first and second elements as a masking element.
摘要:
A method of fabricating a semiconductor IC is disclosed. The method includes receiving a device. The device includes a semiconductor substrate, a plurality of fins and trenches between fins in the semiconductor substrate. The method also includes filling the trenches with a dielectric material to form shallow trench isolations (STI), applying a low-thermal-budget annealing to the dielectric material, and applying a wet-treatment to the dielectric material.
摘要:
A single wafer etching apparatus and various methods implemented in the single wafer etching apparatus are disclosed. In an example, etching a silicon nitride layer in a single wafer etching apparatus includes: heating a phosphoric acid to a first temperature; heating a sulfuric acid to a second temperature; mixing the heated phosphoric acid and the heated sulfuric acid; heating the phosphoric acid/sulfuric acid mixture to a third temperature; and etching the silicon nitride layer with the heated phosphoric acid/sulfuric acid mixture.