摘要:
Fluid-based dielectric material is used to backfill multiple patterned metal layers of an IC on a wafer. The patterned metal layers are fabricated using conventional CMOS techniques, and are IMD layers in particular embodiments. The dielectric material(s) are etched out of the IC to form a metal network, and fluid dielectric material precursor, such as a polyarylene ether-based resin, is applied to the wafer to backfill the metal network with low-k fluid-based dielectric material.
摘要:
Method and apparatus for compensating an integrated circuit design for mechanical stress effects. One aspect of the invention relates to designing an integrated circuit. Layout data is obtained that describes layers of the integrated circuit. At least one of the layers is analyzed to detect at least one structure susceptible to damage from mechanical stress. A bias is automatically added to each of the at least one structure to reduce mechanical stress of the at least one structure as fabricated. Augmented layout data is then provided for the integrated circuit.
摘要:
An integrated circuit device includes a stacked die and a base die having probe pads that directly couple to test logic of the base die to implement a scan chain for testing of the integrated circuit device. The base die further includes contacts disposed on a back side of the base die and through-die vias coupled to the contacts and coupled to programmable logic of the base die. The base die also includes a first probe pad configured to couple test input, a second probe pad configured to couple test output, and a third probe pad configured to couple control signals. Test logic of the base die is configured to couple to additional test logic of the stacked die to implement the scan chain. The probe pads are coupled directly to the test logic such that configuration of the programmable logic is not required to implement the scan chain.
摘要:
A method for improving the planarization of a dielectric layer in the fabrication of metallic interconnects wherein a rapid thermal processing operation is used in order to consolidate exposed surfaces of a dielectric layer after local planarization of the dielectric layer. This method avoids damage to the dielectric layer caused during a pre-metal etching operation, and consequently, prevents residual tungsten from becoming lodged in fissures during subsequent tungsten deposition to produce stringers which may cause short circuiting on coming in contact with metal wiring.
摘要:
A method of designing an active layer mask with a dummy pattern by computer aided design (CAD) in shallow trench isolation using chemical mechanical polishing (CMP) to achieve global planarization. In this method, an original mask is provided with an active region including a diffusion area pattern, a polysilicon area pattern and a well area pattern. The diffusion area pattern and the polysilicon area pattern are expanded by an area of dimension a and the well area pattern is extended inward and outward to an area of dimension b. The expanded diffusion, polysilicon and well areas form a first pattern area. The first pattern area is subtracted from the whole region to obtain a second pattern area. A third pattern area is obtained by performing an AND operation on a dummy array pattern and the second pattern area. Expanding the third pattern area to an area of dimension c, a fourth pattern area is obtained. Finally an active layer mask with a dummy pattern is obtained by performing an OR operation on the fourth pattern area and the diffusion area pattern.
摘要:
A new method of forming a contact opening by using a sacrificial spin-on-glass layer is described. A semiconductor substrate is provided wherein the surface of the substrate has an uneven topography. A glasseous layer is deposited over the uneven surface of the substrate and reflowed at low temperature whereby the glasseous layer will have a trench shaped surface over the planned contact opening area. The glasseous layer is covered with a spin-on-glass layer wherein the spin-on-glass planarizes the surface of the substrate. The spin-on-glass layer is baked and then covered with a uniform thickness layer of photoresist. The photoresist layer is exposed and developed to form the desired photoresist mask for the contact opening. The exposed spin-on-glass and glasseous layers are etched away to provide the contact opening to the semiconductor substrate. The photoresist layer is stripped and the sacrificial spin-on-glass layer is removed to complete the formation of the contact opening in the manufacture of the integrated circuit.
摘要:
A method of reducing the loss of metal silicide in pre-metal etching which includes the following steps. A polysilicon gate electrode and implanted source/drain electrodes are formed on a silicon substrate. A metal silicide layer is formed on the polysilicon gate electrode and the source/drain electrodes. On the surface of the substrate, the polysilicon gate electrode, the source-drain electrodes region and the metal silicide layer, a protecting glass for insulation is formed and then dry etched to form a contact window. The metal silicide layer will form a damaged metal silicide layer in the contact window. Thereafter, a thermal process is conducted to repair the damaged metal silicide layer and finally, pre-metal etching is conducted completing the process. Pursuant to this method, the extremely low resistance of the metal silicide remains.
摘要:
A new method of forming the dielectric layer of an integrated circuit is described. A thick insulating layer is formed over semiconductor device structures in and on a semiconductor substrate. A first metal layer is deposited over the thick insulating layer. The first metal layer is etched using conventional photolithography and etching techniques to form the desired metal pattern on the surface of the thick insulating layer. The intermetal dielectric layer is formed by first covering the patterned first metal layer with a layer of silicon oxide. The silicon oxide layer is covered with a layer of spin-on-glass material which is baked and cured. A second layer of silicon oxide completes the intermetal dielectric layer. Via openings are formed through the intermetal dielectric layer to the underlying patterned first metal layer. A silicon nitride cap is formed on the exposed surfaces of the spin-on-glass layer within the via openings to prevent outgassing from the intermetal dielectric layer, and thus to prevent poisoned via metallurgy. A second metal layer is deposited overlying the intermetal dielectric layer and within the via openings and fabrication of the integrated circuit is completed.
摘要:
A metal oxide semiconductor field effect transistor (MOSFET) for an integrated circuit includes a substrate of a first conductivity type, a first well region of a second conductivity type located in the substrate, and a second well region of the second conductivity type located within the substrate. The second well region is functionally connected to the first well region, and the second well region has a surface area greater than a surface area of the first well region. The MOSFET further includes a source of the first conductivity type located in the first well region, a drain of the first conductivity type located in the first well region, a substrate terminal of the second conductivity type located in the first well region, a gate oxide on a top surface of the first well region, and a gate electrode located on a top surface of the gate oxide.
摘要:
A process for forming high temperature stable self-aligned silicide layer that not only establishes itself smoothly and uniformly despite the use of a high temperature in the siliciding reaction, but also can withstand other subsequent high temperature thermal processing operations and maintaining a stable metal silicide layer profile thereafter. Moreover, desired thickness and uniformity of the metal silicide layer can be obtained by suitably adjusting the amorphous implant parameters, while the use of a titanium nitride cap layer help to stabilize the metal silicide layer during high temperature formation and that a stable and uniform metal silicide layer profile can be ensured even if subsequent high temperature processing operations are performed.