摘要:
A method for moving data in a memory system of a cascading region-based filter is disclosed. The method generally includes steps (A) to (C). Step (A) may load a first portion of the data from a buffer to the memory system at a start of a given cycle using a control circuit. The memory system generally has multiple first memories. A first region of a particular first memory may receive the first portion of data. Step (B) may copy the data in a second region of the particular first memory to a third region of the particular first memory at an end of the given cycle. Step (C) may copy the data in an output region of the particular first memory to an input region of a next first memory at the end of the given cycle. The output region generally overlaps both the first region and the second region.
摘要:
An improved and new process for fabricating self-aligned contacts (SAC) to source/drain areas of complimentary (CMOS) FET's has been developed using a non-conformal layer of silicon nitride, eliminating the need for a hard mask. This process allows for “zero” spacing from contact structure to polysilicon gate structure, for closely spaced design rule gates. Some key process features of this invention are as follows: no hard mask is needed and the gate process is exactly the same as “standard” logic process. The process differences are that between the S/D implant, salicidation and the normal contact process, there is inserted a non-conformal CVD silicon nitride deposition with a SAC pattern and etch process. The process is fully compatible with both state of-the-art salicide and polycide processes. The self-aligned contact process simplifies processing, while yielding improvements in electrical device performance and reliability. The process is very useful for the “standard” logic device salicided processes.
摘要:
A new method of forming MOS transistors with self-aligned silicide has been achieved. A gate oxide layer is formed overlying a semiconductor substrate. A polysilicon layer is deposited. The polysilicon layer and the gate oxide layer are patterned to form gates. Ions are implanted to form lightly doped drain regions. A dielectric layer is deposited. The dielectric layer is polished down to expose the top surface of the gates. The dielectric layer is then anisotropically etched down to form dielectric sidewall spacers. The dielectric sidewall spacers cover a portion of the vertical sidewalls of the gates while exposing a portion of the vertical sidewalls of the gates. Ions are implanted to form source and drain regions. A metal layer is deposited. Contact surfaces are formed between the metal layer with: the exposed top surfaces of the gates, the exposed portions of the vertical sidewalls of the gates, and the exposed source and drain regions. The integrated circuit device is annealed to react the metal layer and the polysilicon layer and silicon to selectively form a silicide layer in the surface of the polysilicon layer and in the surface of the semiconductor substrate at the contact surfaces. The remaining metal layer is removed to complete the device.
摘要:
A method of fabricating local interconnects of polycide has been achieved. A substrate is provided. Narrowly spaced features, such as MOS transistor gates and polysilicon traces, are provided overlying the substrate. A dielectric layer is deposited overlying the substrate and the narrowly spaced features. The dielectric layer is patterned to form openings between the narrowly spaced features for planned contacts to the surface of the substrate. A doped polysilicon layer is deposited overlying the dielectric layer and filling the openings. The doped polysilicon layer is etched down to the top surface of the narrowly spaced features. The doped polysilicon layer remains in the spaces between the narrowly spaced features. A polycide layer is formed overlying the narrowly spaced features and the doped polysilicon layer. The polycide layer and the doped polysilicon layer are patterned to complete the contacts and create the local interconnects of polycide, and the integrated circuit device is completed.
摘要:
A new angle implant is provided that reduces or eliminates the effects of narrow channel impurity diffusion to surrounding regions of insulation. The invention provides for angle implantation of p-type impurities into corners of STI regions that are adjacent to NMOS devices and angle implantation of n-type impurities into corners of STI regions that are adjacent to PMOS devices.
摘要:
A method for integrating salicide and self-aligned contact processes in the fabrication of logic circuits with embedded memory is described. Isolation areas are formed on a semiconductor substrate surrounding and electrically isolating device areas. Gate electrodes and associated source and drain regions are formed on and in the semiconductor substrate wherein the gate electrodes have silicon nitride sidewall spacers. A metal silicide layer is formed on the top surface of the gate electrodes and on the top surface of the semiconductor substrate overlying the source and drain regions associated with the gate electrodes using a salicide process. A poly-cap layer is deposited overlying the substrate. The poly-cap layer is selectively removed overlying one of the salicided source and drain regions where a self-aligned contact is to be formed, and overlying another of the salicided source and drain regions and a portion of its associated salicided gate electrode where a butted contact is to be formed. An insulating layer is deposited over the surface of the semiconductor substrate. The insulating layer is etched through to form simultaneously the planned self-aligned contact opening and the planned butted contact opening. The self-aligned contact opening and the butted contact opening are filled with a conducting layer to complete fabrication of the integrated circuit device.
摘要:
A method for synchronizing a first circuit to an electro-optical sensor is disclosed. The method generally includes steps (A) to (D). Step (A) may generate with the first circuit a configuration signal that conveys a request to capture at least one frame of a plurality of periodic frames. Step (B) may receive the periodic frames at a second circuit from the electro-optical sensor. Step (C) may discard a first frame of the periodic frames where the first frame precedes the request. Step (D) may store a plurality of active pixels in a second frame of the periodic frames in a memory where the second frame follows the request. The second circuit is generally a hardware implementation.
摘要:
A method for integrating salicide and self-aligned contact processes in the fabrication of integrated circuits by using a poly cap mask and a special layout technique is described. A pair of gate electrodes and associated source and drain regions are formed overlying a semiconductor substrate wherein nitride spacers are formed on sidewalls of the gate electrodes. A poly-cap layer is deposited overlying the gate electrodes and source and drain regions. The poly-cap layer is selectively removed overlying one of the source and drain regions between the gate electrode pair where a self-aligned contact is to be formed and removed over one of the gate electrode pair. An insulating layer is deposited over the surface of the semiconductor substrate. The planned self-aligned contact opening is made through the insulating layer to the source/drain region to be contacted wherein the contact opening partially overlies the poly-cap layer over the adjacent gate electrode of the pair. The self-aligned contact opening is filled with a conducting layer to complete fabrication of the integrated circuit device.