摘要:
The density of components in integrated circuits (ICs) is increasing with time. The density of heat generated by the components is similarly increasing. Maintaining the temperature of the components at reliable operating levels requires increased thermal transfer rates from the components to the IC package exterior. Dielectric materials used in interconnect regions have lower thermal conductivity than silicon dioxide. This invention comprises a heat pipe located in the interconnect region of an IC to transfer heat generated by components in the IC substrate to metal plugs located on the top surface of the IC, where the heat is easily conducted to the exterior of the IC package. Refinements such as a wicking liner or reticulated inner surface will increase the thermal transfer efficiency of the heat pipe. Strengthening elements in the interior of the heat pipe will provide robustness to mechanical stress during IC manufacture.
摘要:
An embodiment of the invention is a method of manufacturing an integrated circuit. The method includes forming a capping layer of a back end structure (step 706), drilling an extraction line from the capping layer to an inter-metal dielectric layer (step 708), performing a supercritical fluid process to remove portions of the inter-metal dielectric layer that are coupled to the extraction line (step 710): thereby forming a denuded dielectric region. Another embodiment of the invention is an integrated circuit 2 having a back-end structure 5 coupled to a front-end structure 4. The back-end structure 5 having a first metal level 22. The first metal level 22 having metal interconnects 15 and an inter-metal dielectric layer 19. The back-end structure 5 further containing an extraction line 24 and a denuded dielectric region 25 coupled to the extraction line 24.
摘要:
A method for fabricating a microelectronic structure includes forming a via aperture through a dielectric layer located over a substrate having a conductor layer therein, to expose the conductor layer. The conductor layer typically comprises a copper containing material. The method also includes etching the conductor layer to form a recessed conductor layer prior to etching a trench aperture within the dielectric layer. The trench aperture is typically contiguous with the via aperture to form a dual damascene aperture. By etching the conductor layer after forming the via aperture and before forming the trench aperture, such a dual damascene aperture is formed with enhanced dimensional integrity.
摘要:
Provided is a method for manufacturing an interconnect. The method for manufacturing the interconnect, in one embodiment, includes forming a first metal feature over or within a substrate, the first metal feature having an exposed surface. The method for manufacturing the interconnect may additionally include cleaning the exposed surface using a reactive system with a reducing agent, and subjecting the exposed surface to a plasma etch. The method for manufacturing the interconnect may further include contacting the first metal feature with a second metal feature.
摘要:
A device employs damascene layers with a pore sealing liner and includes a semiconductor body. A metal interconnect layer comprising a metal interconnect is formed over the semiconductor body. A dielectric layer is formed over the metal interconnect layer. A conductive trench feature and a conductive via feature are formed in the dielectric layer. A pore sealing liner is formed only along sidewall of the conductive via feature and along sidewalls and bottom surfaces of the conductive trench feature. The pore sealing liner is not substantially present along a bottom surface of the conductive via feature.
摘要:
The formation of a MIM (metal insulator metal) capacitor (164) and concurrent formation of a resistor (166) is disclosed. A copper diffusion barrier (124) is formed over a copper deposition (110) that serves as a bottom electrode (170) of the capacitor (164). The copper diffusion barrier (124) mitigates unwanted diffusion of copper from the copper deposition (110), and is formed via electro-less deposition such that little to none of the barrier material is deposited at locations other than over a top surface (125) of the deposition of copper/bottom electrode. Subsequently, layers of dielectric (150) and conductive (152) materials are applied to form a dielectric (172) and top electrode (174) of the MIM capacitor (164), respectively, where the layer of conductive top electrode material (152) also functions to concurrently develop the resistor (166) on the same chip as the capacitor (164).
摘要:
The formation of a MIM (metal insulator metal) capacitor (164) and concurrent formation of a resistor (166) is disclosed. A copper diffusion barrier (124) is formed over a copper deposition (110) that serves as a bottom electrode (170) of the capacitor (164). The copper diffusion barrier (124) mitigates unwanted diffusion of copper from the copper deposition (110), and is formed via electro-less deposition such that little to none of the barrier material is deposited at locations other than over a top surface (125) of the deposition of copper/bottom electrode. Subsequently, layers of dielectric (150) and conductive (152) materials are applied to form a dielectric (172) and top electrode (174) of the MIM capacitor (164), respectively, where the layer of conductive top electrode material (152) also functions to concurrently develop the resistor (166) on the same chip as the capacitor (164).
摘要:
A method (10) of forming a MIM (metal insulator metal) capacitor is disclosed whereby adverse affects associated with copper diffusion are mitigated even as the capacitor is scaled down. A layer of bottom electrode/copper diffusion barrier material (136) is formed (16) within an aperture (128) wherein the capacitor (100) is to be defined. The bottom electrode layer (136) is formed via a directional process so that a horizontal aspect (138) of the layer (136) is formed over a metal (110) at a bottom of the aperture (128) to a thickness (142) that is greater than a thickness (144) of a sidewall aspect (148) of the layer (136) formed upon sidewalls (132) of the aperture (128). Accordingly, the thinner sidewall aspects (148) are removed during an etching act (18) while some of the thicker horizontal aspect (138) remains. A layer of capacitor dielectric material (150) is then conformally formed (20) into the aperture 128 and over the horizontal aspect (138). A layer of top electrode material (152) is then conformally formed (22) over the layer of capacitor dielectric material (150) to complete the capacitor stack (154).
摘要:
An integrated circuit copper interconnect structure is formed by forming a dielectric layer (90) over a semiconductor substrate (10). Trenches (110) and vias (120) are formed in the dielectric layer (90) and a barrier layer (130) is formed in the trenches (110) and vias (120) using material such as iridium, iridium oxide, ruthenium, ruthenium oxide, rhodium, rhodium oxide, rhenium, rhenium oxide, platinum, platinum oxide, palladium and palladium oxide. Copper (147) is then used to fill the remaining area in the trenches (110) and vias (120).
摘要:
A metal fuse structure using redundant vias formed on one metal level in a stacked via metal fuse structure to force failures to occur in the metal level that does not have the redundant vias. The metal fuse structure includes a first dielectric layer having a conductor, a second dielectric layer above the first dielectric layer having a first conductive line and a first via, the first via is on the conductor, the first conductive line is on the first via, the first via is the only electrical connection between the first conductive line and the conductor, and a third dielectric layer above the second dielectric layer having a second conductive line, a second via and a third via, the second via and the third via are both on the first conductive line, the second conductive line is on both the first via and the second via.