摘要:
A method of forming a low-k dielectric material layer comprising the following steps. A first dielectric material sub-layer is formed over a substrate. The first dielectric material sub-layer is treated with an energy treatment to form a hardened layer on the upper surface of the first dielectric material sub-layer. A second dielectric material sub-layer is formed over the hardened layer, wherein the first dielectric sub-layer, the hardened layer and the second dielectric sub-layer comprise the low-k dielectric material layer. And a dual damascene structure and a dielectric material structure formed thereby.
摘要:
A method of forming a low-k dielectric material layer comprising the following steps. A first dielectric material sub-layer is formed over a substrate. The first dielectric material sub-layer is treated with an energy treatment to form a hardened layer on the upper surface of the first dielectric material sub-layer. A second dielectric material sub-layer is formed over the hardened layer, wherein the first dielectric sub-layer, the hardened layer and the second dielectric sub-layer comprise the low-k dielectric material layer. And a dual damascene structure and a dielectric material structure formed thereby.
摘要:
A method of protecting a low k dielectric layer that is preferably comprised of a material containing Si, O, C, and H is described. The dielectric layer is subjected to a gas plasma that is generated from a CXHY gas which is preferably ethylene. Optionally, hydrogen may be added to the CXHY gas. Another alternative is a two step plasma process involving a first plasma treatment of CXHY or CXHY combined with H2 and a second plasma treatment with H2. The modified dielectric layer provides improved adhesion to anti-reflective layers and to a barrier metal layer in a damascene process. The modified dielectric layer also has a low CMP rate that prevents scratch defects and an oxide recess from occurring next to the metal layer on the surface of the damascene stack. The plasma treatments are preferably done in the same chamber in which the dielectric layer is deposited.
摘要翻译:描述了保护低k电介质层的方法,其优选由含有Si,O,C和H的材料组成。 对电介质层进行气化等离子体,该等离子体是由优选乙烯的C X H Y气产生的。 任选地,可以将氢气加入到C 1 H 2 H 2 O气体中。 另一种替代方案是涉及第一等离子体处理C X> Y Y or SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB >与H 2 H 2结合,并且与H 2 2进行第二等离子体处理。 改进的介电层在镶嵌工艺中提供对抗反射层和阻挡金属层的改善的粘合性。 改进的介电层也具有低CMP速率,其防止划痕缺陷和氧化物凹陷在镶嵌层的表面上邻近金属层发生。 等离子体处理优选在沉积介电层的相同的室中进行。
摘要:
A method for forming a dielectric insulating layer with a reduced dielectric constant and increased hardness for semiconductor device manufacturing including providing a semiconductor wafer having a process surface for forming a dielectric insulting layer thereover; depositing according to a CVD process a carbon doped oxide layer the CVD process including an oregano-silane precursor having Si—O groups and Si—Ry groups, where R is an alkyl or cyclo-alkyl group and y the number of R groups bonded to Si; and, exposing the carbon doped oxide layer to a hydrogen plasma treatment for a period of time thereby reducing the carbon doped oxide layer thickness including reducing the carbon doped oxide layer dielectric constant and increasing the carbon doped oxide layer hardness.
摘要:
A method of forming a low-k dielectric material layer comprising the following steps. A first dielectric material sub-layer is formed over a substrate. The first dielectric material sub-layer is treated with an energy treatment to form a hardened layer on the upper surface of the first dielectric material sub-layer. A second dielectric material sub-layer is formed over the hardened layer, wherein the first dielectric sub-layer, the hardened layer and the second dielectric sub-layer comprise the low-k dielectric material layer. And a dual damascene structure and a dielectric material structure formed thereby.
摘要:
A method of forming a low dielectric constant film that can be used in a damascene process is disclosed. An organosilicon precursor such as octamethylcyclotrisiloxane (OMCTS) or any other compound that contains Si, C, and H and optionally O is transported into a PECVD chamber with a carrier gas such as CO or CO2 to provide a soft oxidation environment that leads to a higher carbon content and low k value in the deposited film. The carrier gas may replace helium or argon that have a higher bombardment property that can damage the substrate. Since CO and CO2 can contribute carbon to the deposited film, a lower k value is achieved than when an inert carrier gas is employed. The deposited film can be employed, for example, as a dielectric layer in a damascene stack or as an etch stop layer.
摘要:
The present invention provides a method of forming a semiconductor structure having an ultra low-K dielectric material that adheres well to the substrate. The method includes depositing a low-K material on the top surface of a substrate at a low temperature of no more than 250° by a CVD or spin-on process. The dielectric material is then cured by placing the substrate with the dielectric film in an environment where the temperature is regulated at about 400° or less as the dielectric film is being subjected to a plasma treatment or an E-beam treatment or UV treatment. The environment may further include one or more gases or a mixture of gases selected from the group consisting of H2, N2, NH3, CO2, all hydride gases and a mixture of these gases.
摘要:
Attenuated total reflectance (ATR)-Fourier transform infrared (FTIR) metal surface cleanliness monitoring is disclosed. A metal surface of a semiconductor die is impinged with an infrared (IR) beam, such as can be accomplished by using an ATR technique. The IR beam as reflected by the metal surface is measured. For instance, an interferogram of the reflected IR beam may be measured. A Fourier transform of the interferogram may also be performed, in accordance with an FTIR technique. To determine whether the metal surface is contaminated, the IR beam as reflected is compared to a reference sample. For example, the Fourier transform of the interferogram may be compared to the reference sample. If there is deviation by more than a threshold, the metal surface may be concluded as being contaminated.
摘要:
Defects such as holes and bumps in the surface of a semiconductor wafer are detected by an optical inspection system that combines darkfield and brightfield illumination techniques. A single light stop, which forms part of the illumination system, includes a pair of openings configured to produce both a solid cone of light and a hollow of light which are simultaneously focused onto the wafer surface. The directly emanating light as well as the scattered light collected from the wafer surface produce a resultant image that is the product of darkfield and brightfield illumination. Modulation of the light beam and tilting of the light focused onto the wafer surface may be advantageously used to improved contrast and resolution of the viewed image.
摘要:
A novel method for enhancing interface adhesion between adjacent dielectric layers, particularly between an etch stop layer and an overlying dielectric layer having a low dielectric constant (k) in the formation of metal interconnects during the fabrication of integrated circuits on semiconductor wafer substrates. The method may include providing a substrate, providing an etch stop layer on the substrate, providing an oxygen-rich dielectric pre-layer on the etch stop layer and providing a major dielectric layer on the oxygen-rich dielectric pre-layer. Metal interconnects are then formed in the dielectric layers. The oxygen-rich dielectric pre-layer between the etch stop layer and the upper dielectric layer prevents or minimizes peeling and cracking of the layers induced by stresses that are caused by chemical mechanical planarization of metal layers and/or chip packaging.