摘要:
A method for controlling the composition of a chemical bath in which predictive dosing is used to account for changes in the composition of the bath in which the operating characteristics of the process are partitioned into a plurality of operating modes and the consumption or generation of materials related to the process are determined empirically and additions of material are made as appropriate.
摘要:
Interconnect structures with copper conductors being at least substantially free of internal seams or voids are obtained employing an electroplating copper bath containing dissolved cupric salt wherein the concentration of the salt is at least about 0.4 molar and up to about 0.5 molar concentration of an acid. Also provided are copper damascene structures having an aspect ratio of greater than about 3 and a width of less than about 0.275 μm and via openings filled with electroplated copper than is substantially free of internal seams or voids.
摘要:
An improved method of stabilizing wet chemical baths is disclosed. Typically such baths are used in processes for treating workpieces, for example, plating processes for plating metal onto substrates. In particular, the present invention relates to copper plating baths. More particularly, the present invention relates to the stability of copper plating baths. More particularly, the present invention relates to prevention of void formation by monitoring the accumulation of deleterious by-products in copper plating baths.
摘要:
Methods and compositions for electro-chemical-mechanical polishing (e-CMP) of silicon chip interconnect materials, such as copper, are provided. The methods include the use of compositions according to the invention in combination with pads having various configurations.
摘要:
A method for manufacturing high performance copper inductors includes providing a tall, Cu laminate spiral inductor is formed at the last metal level, and at the last metal +1 level, with the metal levels being interconnected by a bar via having the same spiral shape as the spiral metal inductors at the last metal level and the last metal +1 level. The method includes integrating the formation of thick inductors with the formation of bond pads, terminals and interconnect wiring with the last metal +1 wiring. Included are dielectric deposition and spacer formation steps, and/or selective deposition of a passivating metal such as CoWP, to passivate a Cu inductor that is formed after the last metal layer.
摘要:
The fuse link includes a first and second interconnect, with interconnects each being substantially longer than deep. The interconnects are disposed toward each other with a insulator region between them. A fusible conductor, spanning the insulator region, is attached at the top of the interconnects. The present device allows the length of the fusible conductor to be shortened, and results in a fuse link that can be consistently blown with a single laser pulse. Additionally, the fuse link can be used in a staggered layout. The staggered layout of parallel fuse links allows a high number of links in a relatively small area, with or without the use of tungsten barriers, and allows accessing all fuse links through a single fuse blow window.
摘要:
An intermediate semiconductor structure and method for low-pressure wire bonding that reduces the propensity of dielectric material to mechanical failure due to any wire bonding stresses. Roughened surfaces such as metal pillars or metal dendrites are provided on a bonding pad, bonding wire or both. These roughened surfaces increase reactivity between the bond wire and the bond pad to form strong bonds. This increased activity as a result of the roughened bonding pad and/or wire surfaces reduce the amount of pressure, temperature and energy required for wire bonding, which in turn, avoids damage to the bonding pad as well as the semiconductor substrate.
摘要:
The present disclosure sets forth an improved integrated circuit in which circuit elements, adjacent to a fuse, are protected by barriers positioned adjacent the fuse. In the improved integrated circuit the barriers are non-frangible, high melting point structures buried in the passivating layer, covering a wiring layer containing a fuse, and are between the fuse and adjacent circuit elements in the wiring layer structures.Also taught is a method of protecting circuit elements adjacent a fuse comprising the steps of depositing an insulating layer on the surface of a semiconductor device having active regions therein, forming a plurality of fuses and circuit elements in said layer, coating said fuses and elements with a second insulating layer, patterning said second insulating layer to form grooves between each of said fuses and any adjacent fuse or circuit element, and depositing a high melting point and non-frangible material in said grooves.
摘要:
A semiconductor chip carrying integrated circuits has lead lines terminating in conductive terminal pads exposed to the exterior through openings in a passivation layer. The pads include pedestals or bumps extending up from them. Each of the pedestals includes a thin metallic adhesion layer deposited on the pad. A thick metallic layer of aluminum or an alloy of aluminum is deposited upon said thin metallic adhesion layer. The thick metallic layer includes at least one metal selected from the group consisting of aluminum, aluminum plus a small percentage of Cu, Ni, Si, or Fe. Several other alternative metals can be added to aluminum to form an alloy. The thick metallic layer forms the bulk of the height of the pedestal. An adhesion layer is deposited on the bump of aluminum composed of a thin film of titanium or chromium. A barrier layer is deposited on the adhesion layer composed of copper, nickel, platinum, palladium or cobalt. A noble metal consisting of gold, palladium, or platinum is deposited on the barrier layer. In a variation of the top surface, a thick cap of a reworkable bonding metal is deposited above the metallic bump as the top surface of said bump. The bump can be composed of a number of metals such as gold, copper, nickel and aluminum in this case with aluminum being preferred. In place of the adhesion and barrier metals one can employ a layer of titanium nitride deposited on said thick layer of metal.