摘要:
A method is provided for removing exposed seed layers in the fabrication of solder interconnects on electronic components such as semiconductor wafers without damaging the interconnects or underlying wafer substrate and with a high wafer yield. The solder interconnects are lead free or substantially lead free and typically contain Sn. An oxalic acid solution is used to contact the wafer after an etching step to remove part of the seed layer. The seed layer is typically a Cu containing layer with a lower barrier layer containing barrier metals such as Ti, Ta and W. The lower barrier layer remains after the etch and the oxalic acid solution inhibits the formation of Sn compounds on the barrier layer surface which compounds may mask the barrier layer and the barrier layer etchant resulting in incomplete barrier layer removal on the wafer surface. Any residual conductive barrier layer can cause shorts and other wafer problems and result in a lower wafer yield. An electroetch is preferred to remove the portion of the seed layer overlying the lower barrier layer.
摘要:
A method to determine the cleanness of a semiconductor substrate and the quantity/density of pin holes that may exist within a patterned antireflective coating (ARC) is provided. Electroplating is employed to monitor the changes in the porosity of the ARC caused by the pin holes during solar cell manufacturing. In particular, electroplating a metal or metal alloy to form a metallic grid on an exposed front side surface of a substrate also fills the pin holes. The quantity/density of metallic filled pin holes (and hence the number of pin holes) in the patterned ARC can then be determined.
摘要:
An electrochemical process comprising: providing a 125 mm or larger semiconductor wafer in electrical contact with a conducting surface, wherein at least a portion of the semiconductor wafer is in contact with an electrolytic solution, said semiconductor wafer functioning as a first electrode; providing a second electrode in the electrolytic solution, the first and second electrode connected to opposite ends of an electric power source; and irradiating a surface of the semiconductor wafer with a light source as an electric current is applied across the first and the second electrodes. The invention is also directed to an apparatus including a light source and electrochemical components to conduct the electrochemical process.
摘要:
An assembly including a main wafer having a body with a front side and a back side and a plurality of blind electrical vias terminating above the back side, and a handler wafer, is obtained. A step includes exposing the blind electrical vias to various heights on the back side. Another step involves applying a first chemical mechanical polish process to the back side, to open any of the surrounding insulator adjacent the end regions of the cores remaining after the exposing step, and to co-planarize the via conductive cores, the surrounding insulator adjacent the side regions of the cores, and the body of the main wafer. Further steps include etching the back side to produce a uniform standoff height of each of the vias across the back side; depositing a dielectric across the back side; and applying a second chemical mechanical polish process to the back side.
摘要:
The present disclosure relates to a microelectronic structure and the manufacture of the microelectronic structure. Specifically, the disclosure relates to an interconnect barrier layer between a rhodium contact structure and a copper interconnect structure in a microelectronic structure. The microelectronic structure provides for low resistance in microelectronic devices.
摘要:
A method of forming an inductor. The method including: (a) forming a dielectric layer on a top surface of a substrate; after (a), (b) forming a lower trench in the dielectric layer; after (b), (c) forming a resist layer on a top surface of the dielectric layer; after (c), (d) forming an upper trench in the resist layer, the upper trench aligned to the lower trench, a bottom of the upper trench open to the lower trench; and after (d), (e) completely filling the lower trench and at least partially filling the upper trench with a conductor in order to form the inductor.
摘要:
An electrochemical process comprising: providing a 125 mm or larger semiconductor wafer in electrical contact with a conducting surface, wherein at least a portion of the semiconductor wafer is in contact with an electrolytic solution, said semiconductor wafer functioning as a first electrode; providing a second electrode in the electrolytic solution, the first and second electrode connected to opposite ends of an electric power source; and irradiating a surface of the semiconductor wafer with a light source as an electric current is applied across the first and the second electrodes. The invention is also directed to an apparatus including a light source and electrochemical components to conduct the electrochemical process.
摘要:
A dielectric material formed by contacting a low dielectric constant polymer with liquid or supercritical carbon dioxide, under thermodynamic conditions which maintain the carbon dioxide in the liquid or supercritical state, wherein a porous product is formed. Thereupon, thermodynamic conditions are changed to ambient wherein carbon dioxide escapes from the pores and is replaced with air.
摘要:
A method for cleaning a semiconductor structure including providing a chamber for holding the semiconductor structure and a dense phase fluid, providing a thermal transfer device having a thermal transfer surface, connecting the thermal transfer device to the chamber, placing the semiconductor structure in the chamber in contact with the thermal transfer surface and thermally cycling the thermal transfer surface.
摘要:
An inductor and a method of forming and the inductor, the method including: (a) providing a semiconductor substrate; (b) forming a dielectric layer on a top surface of the substrate; (c) forming a lower trench in the dielectric layer; (d) forming a resist layer on a top surface of the dielectric layer; (e) forming an upper trench in the resist layer, the upper trench aligned to the lower trench, a bottom of the upper trench open to the lower trench; and (f) completely filling the lower trench at least partially filling the upper trench with a conductor in order to form the inductor. The inductor including a top surface, a bottom surface and sidewalls, a lower portion of said inductor extending a fixed distance into a dielectric layer formed on a semiconductor substrate and an upper portion extending above said dielectric layer; and means to electrically contact said inductor.