摘要:
A Dynamic Random Access Memory (DRAM) configurable by eight (.times.8) or by nine (.times.9). The DRAM has nine Data Input/Outputs (I/Os). The memory array is divided into two or more sub-arrays, with sub-array cells arranged in addressable rows and columns. When the DRAM is configured .times.8, one I/O is held in its high impedance state; one ninth of the DRAM's data path (between the array and the ninth I/O) is ignored; and, the entire array address space is available for data storage through eight I/Os. When the DRAM is configured .times.9, all nine I/Os are active; the DRAM I/O path is reconfigured with part of the array providing the ninth bit through the ninth I/O; and the array address space reduced by one-eighth. All nine bits may be from a common sub-array. Alternatively, sub-arrays may be paired so that when the DRAM is configured .times.9, eight bits are accessed in seven-eighths of one sub-array, with the ninth bit being accessed in one eighth of the other sub-array of the pair.
摘要:
A method of forming a sub-lithographic image formed by the intersection of two spacers. A substrate with a first pattern of selectively etchable material with sidewalls that are substantially vertical is provided. A first sidewall spacer is formed of a material that is selectively etchable relative to the first pattern material. A second pattern of a selectively etchable material is formed with the second pattern intersecting the first pattern. The sidewalls of the second pattern are substantially vertical as well. A second sidewall spacer is formed of a material that is selectively etchable relative to the second pattern material. The second pattern material is etched to leave the second sidewall spacer. Alternatively, the first and/or second pattern materials may be totally removed, left in place, or planarized.
摘要:
This invention comprises various high production methods for simultaneously forming surface metallizations on a plurality of monolithic electronic modules. Each monolithic electronic module may comprise a single semiconductor chip or multiple semiconductor chips. The methods can employ a workpiece which automatically discontinues side surface metallization between different electronic modules in the stack. Multiple workpieces are interleaved within the stack between the electronic modules. Each workpiece may include a transfer layer(s) for permanent bonding to an end surface of an adjacent electronic module in the stack. This transfer layer may comprise an insulation layer, a metallization layer, an active circuit layer, or any combination thereof. End surface metallization can thus be provided contemporaneous with side surface metallization of multiple electronic modules.
摘要:
A fabrication method and resultant monolithic electronic module having a separately formed thin-film layer attached to a side surface. The fabrication method includes providing an electronic module composed of stacked integrated circuit chips. A thin-film layer is separately formed on a temporary support which is used to attach the thin-film layer to the electronic module. The disclosed techniques may also be used for attaching an interposer, which may include active circuity, to an electronic module. Specific details of the fabrication method, resulting multichip packages, and various thin-film structures are set forth.
摘要:
An integrated multichip memory module structure and method of fabrication wherein stacked semiconductor memory chips are integrated by a controlling logic chip such that a more powerful memory architecture is defined with the appearance of a single, higher level memory chip. A memory subunit is formed having N memory chips with each memory chip of the subunit having M memory devices. The controlling logic chip coordinates external communication with the N memory chips such that a single memory chip architecture with N.times.M memory devices appears at the module's I/O pins. A preformed electrical interface layer is employed at one end of the memory subunit to electrically interconnect the controlling logic chip with the memory chips comprising the subunit. The controlling logic chip has smaller dimensions than the dimensions of the memory chips comprising the subunit. A lead frame, having an inner opening extending therethrough, is secured to the electrical interface layer and the controlling logic chip is secured to the electrical interface layer so as to reside within the lead frame, thereby producing a dense multichip integrated circuit package. Corresponding fabrication techniques include an approach for facilitating metallization patterning on the side surface of the memory subunit.
摘要:
A method is described for selectively masking sidewall regions of a concave surface formed in a semiconductor body, the method comprising the steps of: forming a conformal layer of masking material on a sidewall of the concave structure; emplacing in the concave structure, a selectively removable material that partially fills the concave structure, an upper surface of the material determining the edge of a region of the concave structure to be masked; removing a portion of the conformal layer above the upper surface of the selectively removable material; and removing the selectively removable material to leave a region of remaining conformal material as a mask.
摘要:
A family of digital logic circuits constructed with resistive gate field effect transistors is provided. The logic circuits are comprised of AND and OR circuits, each implemented with resistive gate devices. In constructing the AND circuit, the resistive gate lies along the length of the channel region between the source and drain of the device. Logic input signals are selectively applied along the length of the channel region to the resistive gate. The device will conduct between source and drain only if all points along the channel are above the local threshold voltage of the channel region which will occur when appropriate logic signals are applied simultaneously to all logic input terminals. A logic OR device is realized when the resistive gate is formed transverse to the channel such that each input to the gate controls a portion of the channel between the source and drain. NAND and NOR circuits are provided using the resistive gate logic device in an inverter circuit.
摘要:
Protective devices and circuits for insulated gate transistors are improved by another p/n junction diode or MOS diode preventing breakdown of the thin oxide of the protective device. The breakdown voltage of the protective device or p/n diode may be tailored to a preselected voltage by altering its metallurgical junction by ion implantation or other techniques. Tailoring permits the breakdown voltage of the protective device to be independent of process and circuit specification of a protected or internal circuit. A plurality of parallel circuits connected as a protective device limits or controls secondary breakdown of the protective device.
摘要:
Under one aspect, a method of making a nanotube switch includes: providing a substrate having a first conductive terminal; depositing a multilayer nanotube fabric over the first conductive terminal; and depositing a second conductive terminal over the multilayer nanotube fabric, the nanotube fabric having a thickness, density, and composition selected to prevent direct physical and electrical contact between the first and second conductive terminals. In some embodiments, the first and second conductive terminals and the multilayer nanotube fabric are lithographically patterned so as to each have substantially the same lateral dimensions, e.g., to each have a substantially circular or rectangular lateral shape. In some embodiments, the multilayer nanotube fabric has a thickness from 10 nm to 200 nm, e.g., 10 nm to 50 nm. The structure may include an addressable diode provided under the first conductive terminal or deposited over the second terminal.
摘要:
Under one aspect, a nanotube diode includes: a cathode formed of a semiconductor material; and an anode formed of nanotubes. The cathode and anode are in fixed and direct physical contact, and are constructed and arranged such that sufficient electrical stimulus applied to the cathode and the anode creates a conductive pathway between the cathode and the anode. In some embodiments, the anode includes a non-woven nanotube fabric having a plurality of unaligned nanotubes. The non-woven nanotube fabric may have a thickness, e.g., of 0.5 to 20 nm. Or, the non-woven nanotube fabric may include a block of nanotubes. The nanotubes may include metallic nanotubes and semiconducting nanotubes, and the cathode may include an n-type semiconductor material. A Schottky barrier can form between the n-type semiconductor material and the metallic nanotubes and/or a PN junction can form between the n-type semiconductor material and the semiconducting nanotubes.