摘要:
Apparatus and method for metal electroplating. The apparatus for metal electroplating includes an electroplating tank for containing an electrolyte at a first temperature, a substrate holder for holding a semiconductor substrate, and a heater for heating the portion of the electrolyte adjacent to the substrate holder to a second temperature higher than the first temperature.
摘要:
A method of fabricating a planarized metal structure comprising the following steps. A structure is provided. A patterned dielectric layer is formed over the structure. The patterned dielectric layer having an opening formed therein and exposing at least a portion of the structure. A first-metal layer is formed over the patterned dielectric layer filling the opening. The first-metal layer including at least a doped metal portion adjacent the patterned dielectric layer. The doped metal portion being doped with a second-metal. The structure is annealed to form a second-metal oxide layer adjacent the patterned dielectric layer. The first-metal layer and the second-metal oxide layer are planarized using only a electropolishing process to remove the excess of the first-metal layer and the second-metal oxide layer from over the patterned dielectric layer and leaving a planarized metal structure within the opening.
摘要:
A new method is provided for creating a dual damascene structure. Two layers of dielectric are deposited in sequence. The lower layer of dielectric is the via dielectric and is selected such that it has a low etching rate (when compared with the upper layer of dielectric) and results in different volatile gas during the etch of the via. A first photoresist is patterned for the via, the etch for the via etches through both layers of dielectric. A second layer of photoresist is patterned for the trench etch, due to the difference in etch rate between the two layers of dielectric, the trench of the dual damascene structure is etched without further affecting the via etch in the lower layer of dielectric.
摘要:
A new method is provided whereby a copper seed layer is deposited over a barrier layer of TaN. Under the first embodiment of the invention, a doped seed layer is deposited over the barrier layer. Under the second embodiment of the invention a thin layer of metal is deposited over a seed layer of pure copper thereby preventing oxidation of the copper seed layer.
摘要:
A method for marking a semiconductor wafer without inducing flat edge particles, using a laser scribing technique. The process begins by providing a semiconductor wafer having a marking area with a silicon top layer. The semiconductor wafer is coated with a photoresist layer. A volume of the photoresist layer and a volume of silicon top layer are removed corresponding to the intended marking. Optionally, the marking pattern can be further etched into the silicon top layer by anisotropic etching, using the photoresist layer as an etching mask. In another option, the laser scribing process can be set to scribe the marking pattern in the photoresist layer without scribing the silicon top layer. The marking pattern can then be anisotropically etched into the silicon top layer, using the photoresist layer as an etching mask. Alternatively, the photoresist layer can be patterned to form an opening in the photoresist layer over a marking area, thereby exposing the silicon top layer. The silicon top layer is then marked using a laser scribing technique, and the photoresist layer prevents contamination of the device areas of the wafer by the silicon particles generated by the laser scribing technique.
摘要:
A method and system is provided for efficiently varying the composition of the metal interconnects for a semiconductor device. A metal interconnect according to the present disclosure has an intermediate layer on a dielectric material, the intermediate layer having a relatively higher concentration of an impurity metal along with a primary metal, the impurity metal having a lower reduction potential than the primary metal. The metal interconnect has a main layer of the metal alloy interconnect on top of the intermediate layer and surrounded by the intermediate layer, the main layer having a relatively higher concentration of the primary metal than the intermediate layer, wherein the intermediate and main layers of the metal alloy interconnect each maintains a material uniformity.
摘要:
An electrochemical plating apparatus and method for facilitating uniform current distribution across a wafer during loading into an ECP (electrochemical plating) apparatus is disclosed. The apparatus includes a bath container for containing a bath solution, an anode provided in the bath container, a cathode ring for supporting a wafer in the bath container and a current source electrically connected to the anode and the cathode ring. According to the method, a voltage potential is applied to the cathode ring as it is immersed into the solution and prior to immersion of the wafer in the solution, thereby facilitating a substantially uniform plating current across the wafer upon immersion of the wafer.
摘要:
A method and system is provided for efficiently varying the composition of the metal interconnects for a semiconductor device. A metal interconnect according to the present disclosure has an intermediate layer on a dielectric material, the intermediate layer having a relatively higher concentration of an impurity metal along with a primary metal, the impurity metal having a lower reduction potential than the primary metal. The metal interconnect has a main layer of the metal alloy interconnect on top of the intermediate layer and surrounded by the intermediate layer, the main layer having a relatively higher concentration of the primary metal than the intermediate layer, wherein the intermediate and main layers of the metal alloy interconnect each maintains a material uniformity.
摘要:
Copper interconnect structures for interconnection. The interconnect structure has a copper recess in a damascene structure with copper filled in a via/trench of a dielectric layer. Furthermore, the interconnect structure can also have a metal cap filled the copper recess.
摘要:
Methods and apparatuses for electrochemically depositing a metal layer onto a substrate. An electrochemical deposition apparatus comprises a substrate holder assembly including a substrate chuck and a relatively soft cathode contact ring. The cathode contact ring comprises an inner portion and an outer portion, wherein the inner portion directly contacts the substrate. An anode is disposed in an electrolyte container. A power supply connects the substrate holder assembly and the anode.