摘要:
A method for forming structure aligned with features underlying an opaque layer is provided for an interconnect structure, such as an integrated circuit. In one embodiment, the method includes forming an opaque layer over a first layer, the first layer having a surface topography that maps to at least one feature therein, wherein the opaque layer is formed such that the surface topography is visible over the opaque layer. A second feature is positioned and formed in the opaque layer by reference to such surface topography.
摘要:
A method of forming contacts for semiconductor devices, the method including depositing an inter-level dielectric (ILD) over a plurality of gate stacks, in which the divots within the inter-level dielectric layer are defined by the spaces between the gate stacks, filling the divots with an initial fill material, depositing a masking material on the dielectric over the gate stacks, and selectively etching the fill material to form contact vias. The fill material may be a self-assembly material such as a multi-block copolymer in which the blocks self organize vertically within the divots, so that a selective etch of the block material will remove the vertically organized blocks from the divot, but leave at least one block over the gate regions. In another embodiment, the fill material may be a metal, and the masking material may be a parylene based polymer.
摘要:
A method of forming contacts for semiconductor devices, the method including depositing an inter-level dielectric (ILD) over a plurality of gate stacks, in which the divots within the inter-level dielectric layer are defined by the spaces between the gate stacks, filling the divots with an initial fill material, depositing a masking material on the dielectric over the gate stacks, and selectively etching the fill material to form contact vias. The fill material may be a self-assembly material such as a multi-block copolymer in which the blocks self organize vertically within the divots, so that a selective etch of the block material will remove the vertically organized blocks from the divot, but leave at least one block over the gate regions. In another embodiment, the fill material may be a metal, and the masking material may be a parylene based polymer.
摘要:
A semiconductor chip including a substrate; a dielectric layer over the substrate; a gate within the dielectric layer, the gate including a sidewall; a contact contacting a portion of the gate and a portion of the sidewall; and a sealed air gap between the sidewall, the dielectric layer and the contact.
摘要:
A semiconductor chip, including a substrate; a dielectric layer over the substrate; a gate within the dielectric layer, the gate including a sidewall; a source and a drain in the substrate adjacent to the gate; a tapered contact contacting a portion of one of the source or the drain; and a sealed air gap between the sidewall and the contact.
摘要:
An exemplary method lines the sidewalls of a first opening with a sacrificial material and then fills the first opening with a metallic conductor in a manner such that the metallic conductor contacts the substrate. Next, the method selectively removes the sacrificial material, to create at least one “second” opening along the metallic conductor within the first opening. The method selectively removes portions of the first insulator layer through the second opening to leave at least one air gap between the metallic conductor and the first insulator layer in the lower region of the second opening.
摘要:
Disclosed are embodiments of a semiconductor structure having a contact-level air gap within the interlayer dielectrics above a semiconductor device in order to minimize parasitic capacitances (e.g., contact-to-contact capacitance, contact-to-diffusion region capacitance, gate-to-contact capacitance, gate-to-diffusion region capacitance, etc.). Specifically, the structure can comprise a semiconductor device on a substrate and at least three dielectric layers stacked above the semiconductor device. An air gap is positioned with the second dielectric layer aligned above the semiconductor device and extending vertically from the first dielectric layer to the third dielectric layer. Also disclosed are embodiments of a method of forming such a semiconductor structure using a self-assembly approach.
摘要:
A semiconductor chip including a substrate; a dielectric layer over the substrate; a gate within the dielectric layer, the gate including a sidewall; a contact contacting a portion of the gate and a portion of the sidewall; and a sealed air gap between the sidewall, the dielectric layer and the contact.
摘要:
A semiconductor substrate having an isolation region and method of forming the same. The method includes the steps of providing a substrate having a substrate layer, a buried oxide (BOX), a silicon on insulator (SOI) layer, a pad oxide layer, and a pad nitride layer, forming a shallow trench region, etching the pad oxide layer to form ears and etching the BOX layer to form undercuts, depositing a liner on the shallow trench region, depositing a soft mask over the surface of the shallow trench region, filling the shallow trench region, etching the soft mask so that it is recessed to the top of the BOX layer, etching the liner off certain regions, removing the soft mask, and filling and polishing the shallow trench region. The liner prevents shorting of the semiconductor device when the contacts are misaligned.
摘要:
Methods of forming an integrated circuit structure utilizing a selectively formed and at least partially oxidized metal cap over a gate, and associated structures. In one embodiment, a method includes providing a precursor structure including a transistor having a metal gate; forming an etch stop layer over an exposed portion of the metal gate; at least partially oxidizing the etch stop layer; and forming a dielectric layer over the at least partially oxidized etch stop layer.