摘要:
A process for the low temperature deposition of a thin film of borophosphosilicate glass ("BPSG") for use in semiconductor devices, such as DRAMs, is disclosed. The process includes utilizing R--OH groups as reagents to provide additional --OH groups so that an intermediate {Si(OH).sub.4 }.sub.n is formed having superior reflow properties so that the annealing and reflow steps may occur at temperatures less than 750.degree. C., which is the current processing temperature.
摘要:
Polysilicon (20) in a trench (21) is etched at an angle to produce a conductor within the trench that has shape characteristics which approximate the shadow of the side wall (26) of the trench (21) closest the beam source. Specifically, when the first side wall (26) is closest the beam source and the second side wall (27) is furthest from the beam source, the polysilicon on the first side wall (26) is almost as high as the first side wall (26), while the polysilicon on the more exposed side wall (27) is considerably lower than the first side wall (26) and approximates the shadow of the first side wall (26) on the second side wall (27) relative to the beam. The polysilicon (20) in the trench (21) may be in the shape of a solid angled block approximating the shadow line from the top of side wall (26) to side wall (27); however, it is preferred that the polysilicon take the form of a conformal layer in trench (21) prior to etching such that the polysilicon ultimately has an angled "U" shape which approximates the shadow line. Contact is made to the polysilicon (20) using strap (23) that electrically connects the side wall (26) with the polysilicon (20). Strap (23) is sized such that it does not extend to the opposite side wall (27) of trench (21), thereby avoiding short circuits. Having the polysilicon (20) approximate the shadow line of the etch permits narrowing the distance between adjacent straps (23) and (24) in an array without the risk of creating a short circuit.
摘要:
A process for forming a thin film on a surface of a semiconductor device. The process involves formation of a silicon dioxide film by plasma enhanced thermal oxidation, employing a mixture of ozone and oxygen which are generated separately from the reactor chamber in a volume ratio of about 1-10/1, preferably about 5-7/1, at a temperature generally below 440.degree. C., preferably about 350.degree.-400.degree. C. The process is used to form sidewall oxide spacers on polysilicon gates for field effect transistors. A relatively fast oxidation rate is achieved at a temperature significantly below that employed in conventional oxidation processes, and this serves to reduce dopant diffusion from the polysilicon. In addition, the resulting film demonstrates low stress with good conformal step coverage of the polysilicon gates. Another use of the process is to grow thin gate oxides and oxide-nitride-oxide with a thickness of less than 100.ANG.. An oxide film of uniform thickness is formed by controlling the temperature, RF power, exposure time and oxygen/ozone ratio for thin gate oxide (
摘要:
Methods are provided for processing a substrate for depositing an adhesion layer having a low dielectric constant between two low k dielectric layers. In one aspect, the invention provides a method for processing a substrate including depositing a barrier layer on the substrate, wherein the barrier layer comprises silicon and carbon and has a dielectric constant less than 4, depositing a dielectric initiation layer adjacent the barrier layer, and depositing a first dielectric layer adjacent the dielectric initiation layer, wherein the dielectric layer comprises silicon, oxygen, and carbon and has a dielectric constant of about 3 or less.
摘要:
A low-k dielectric material with increased cohesive strength for use in electronic structures including interconnect and sensing structures is provided that includes atoms of Si, C, O, and H in which a fraction of the C atoms are bonded as Si—CH3 functional groups, and another fraction of the C atoms are bonded as Si—R—Si, wherein R is phenyl, —[CH2]n— where n is greater than or equal to 1, HC═CH, C═CH2, C≡C or a [S]n linkage, where n is a defined above.
摘要:
A semiconductor device and associated method for forming. The semiconductor device comprises an electrically conductive nanotube formed over a first electrically conductive member such that a first gap exists between a bottom side the electrically conductive nanotube and a top side of the first electrically conductive member. A second insulating layer is formed over the electrically conductive nanotube. A second gap exists between a top side of the electrically conductive nanotube and a first portion of the second insulating layer. A first via opening and a second via opening each extend through the second insulating layer and into the second gap.
摘要:
A dielectric cap, interconnect structure containing the same and related methods are disclosed. The inventive dielectric cap includes a multilayered dielectric material stack wherein at least one layer of the stack has good oxidation resistance, Cu diffusion and/or substantially higher mechanical stability during a post-deposition curing treatment, and including Si—N bonds at the interface of a conductive material such as, for example, Cu. The dielectric cap exhibits a high compressive stress and high modulus and is still remain compressive stress under post-deposition curing treatments for, for example: copper low k back-end-of-line (BEOL) nanoelectronic devices, leading to less film and device cracking and improved reliability.
摘要:
A method for fabricating a SiCOH dielectric material comprising Si, C, O and H atoms from a single organosilicon precursor with a built-in organic porogen is provided. The single organosilicon precursor with a built-in organic porogen is selected from silane (SiH4) derivatives having the molecular formula SiRR1R2R3, disiloxane derivatives having the molecular formula R4R5R6—Si—O—Si—R7R8R9, and trisiloxane derivatives having the molecular formula R10R11R12—Si—O—Si—R13R14—O—Si—R15R16R17 where R and R1-17 may or may not be identical and are selected from H, alkyl, alkoxy, epoxy, phenyl, vinyl, allyl, alkenyl or alkynyl groups that may be linear, branched, cyclic, polycyclic and may be functionalized with oxygen, nitrogen or fluorine containing substituents. In addition to the method, the present application also provides SiCOH dielectrics made from the inventive method as well as electronic structures that contain the same.
摘要:
A programmable structure such as a write once read many (WORM) or one time programmable read only memories (OTPROM) is disclosed herein. The structure includes a first conductor (such as copper) positioned within a substrate and a metal cap on the first conductor. A low-k dielectric is on the substrate and the metal cap. A tantalum nitride resistor is on the dielectric, and the resistor is positioned above the metal cap such that a programmable region of the dielectric is positioned between the resistor and the metal cap. The first conductor (including the metal cap), the programmable region of the dielectric, and the resistor form a metal-insulator-metal capacitor. Further, the programmable region of the dielectric is adapted to be permanently changed from heat produced by the resistor when a voltage difference is applied to the first and second ends of the resistor, respectively, through the first and second contacts. Thus, the capacitor comprises a first capacitance before the programmable region is permanently changed by the heat from the resistor and comprises a second capacitance after the programmable region is permanently changed by the heat from the resistor.
摘要:
The present invention provides a hardmask that is located on a surface of a low k dielectric material having at least one conductive feature embedded therein. The hardmask includes a lower region of a hermetic oxide material located adjacent to the low k dielectric material and an upper region comprising atoms of Si, C and H located above the hermetic oxide material. The present invention also provides a method of fabricating the inventive hardmask as well as a method to form an interconnect structure containing the same.