摘要:
An integrated circuit device including a link point for electrically connecting a plurality of metal layers, comprising a first metal layer, a link insulating layer and a second metal layer. Diffusion barrier may be employed between the link insulator layer and each of the first metal layer and the second metal layer. The metal layers are connected by exposing the link point to a low-power laser for a relatively long pulse width.
摘要:
An integrated circuit device including a link point for electrically connecting a plurality of metal layers, comprising a first metal layer, a link insulating layer, a second metal layer and diffusion barrier layers between the link insulator layer and each of the first metal layer and the second metal layer. The metal layers are connected by exposing the link point to a low-power laser for a relatively long pulse width.
摘要:
A method and apparatus for reliably forming low resistance links between two aluminum conductors deposited on an insulating polysilicon or amorphous silicon layer, employ a laser to bridge a lateral gap between the conductors. The apparatus and method are ideally suited for implementing defect avoidance using redundancy in large random access memories and in complex VLSI circuits. Only a single level of metal is employed and leads to both higher density and lower capacitance in comparison to prior techniques. Resistances in the range of one to ten ohms can be achieved for gap widths of approximately two to three microns.
摘要:
An improved metal dual insulator semiconductor capacitor memory is disclosed. The memory contains a plurality of capacitor cells, each cell comprising a semiconductor substrate layer and a high conductivity layer sandwiching two insulator layers. The substrate is doped to provide avalanche breakdown in a surface depletion layer at a voltage comparable to the write voltage in the accumulation direction. The invention also provides a method of reading stored information without disturbing adjacent cells. A small variable voltage is applied across a "flat-band" portion of the hysteresis loop describing the voltage-capacitance relationship for the capacitor memory. A change or the absence of a change in the current through the capacitor indicates the state of the capacitor cell. Methods to fabricate the memory are also disclosed.
摘要:
An improved metal dual insulator semiconductor capacitor memory is disclosed. The memory contains a plurality of capacitor cells, each cell comprising a semiconductor substrate layer and a high conductivity layer sandwiching two insulator layers. The substrate is doped to provide avalanche breakdown in a surface depletion layer at a voltage comparable to the write voltage in the accumulation direction. The invention also provides a method of reading stored information without disturbing adjacent cells. A small variable voltage is applied across a "flat-band" portion of the hysteresis loop describing the voltage-capacitance relationship for the capacitor memory. A change or the absence of a change in the current through the capacitor indicates the state of the capacitor cell. Methods to fabricate the memory are also disclosed.
摘要:
An improved method for reading metal dual insulator semiconductor capacitor memories is disclosed. The memory contains a plurality of capacitor cells, each cell comprising a semiconductor substrate layer and a high conductivity layer sandwiching two insulator layers. The substrate is doped to provide avalanche breakdown in a surface depletion layer at a voltage comparable to the write voltage in the accumulation direction. According to the invention, a small variable voltage is applied across a selected cell or cells. The range of voltage includes a "flat-band" portion of the hysteresis loop describing the voltage-capacitance relationship for the capacitor memory. The unselected cells are maintained in a depletion state in which their capacitance is a minimum. A change or the absence of a change in the current through the capacitor indicates the state of the capacitor cell.
摘要:
A photodiode is formed in a recessed germanium (Ge) region in a silicon (Si) substrate. The Ge region may be fabricated by etching a hole through a passivation layer on the Si substrate and into the Si substrate and then growing Ge in the hole by a selective epitaxial process. The Ge appears to grow better selectively in the hole than on a Si or oxide surface. The Ge may grow up some or all of the passivation sidewall of the hole to conformally fill the hole and produce a recessed Ge region that is approximately flush with the surface of the substrate, without characteristic slanted sides of a mesa. The hole may be etched deep enough so the photodiode is thick enough to obtain good coupling efficiencies to vertical, free-space light entering the photodiode.
摘要:
A photodiode is formed in a recessed germanium (Ge) region in a silicon (Si) substrate. The Ge region may be fabricated by etching a hole through a passivation layer on the Si substrate and into the Si substrate and then growing Ge in the hole by a selective epitaxial process. The Ge appears to grow better selectively in the hole than on a Si or oxide surface. The Ge may grow up some or all of the passivation sidewall of the hole to conformally fill the hole and produce a recessed Ge region that is approximately flush with the surface of the substrate, without characteristic slanted sides of a mesa. The hole may be etched deep enough so the photodiode is thick enough to obtain good coupling efficiencies to vertical, free-space light entering the photodiode.
摘要:
In a semiconductor device fabrication process, the SILO (Sealed Interface Local Oxidation) field oxide formation process is used to provide essentially vertical sidewalls between the field oxide surface and active regions. After field oxide formation and doping of active regions, the device is conformally coated with an oxide layer, which is patterned by a conventional photomasking process to define contact holes. Contact holes are then anisotropically etched through the oxide layer to the active regions. Conformal coating of the vertical sidewalls insures that an oxide sidewall spacer remains where the contact holes intersect the field oxide. Finally, a metal contact layer is deposited in the contact holes. The sidewall spacer automatically spaces the metal contact from the edges of the active region, thereby preventing leakage to the substrate.
摘要:
A flip-bonding technique is used to fabricate complex micro-electromechanical systems. Various micromachined structures are fabricated on the front side of each of two wafers. One of the wafers is flipped over and bonded to the other wafer so that the front sides of the two wafers are bonded together in a flip-stacked configuration.