摘要:
A method of simulating the electrical behavior of an ideal transformer. The representation of the ideal transformer is frequency independent and can be used to simulate the behavior of an ideal transformer over the frequency range from DC to infinity. In one embodiment, the ideal transformer is represented as having an input sub-circuit and an output sub-circuit. Each sub-circuit includes a resistor connected in parallel across a current controlled current source. The input current, output current, current sources, and resistances are scaled by a scaling factor representing the turns ratio between the primary and secondary windings of a physical transformer. In the present invention, the current sources are responsible for the current scaling and the resistors are responsible for the impedance scaling. The circuit elements of the representation may be used as the basis for generating a set of input parameters for a circuit emulation program.
摘要:
Described are methods of manufacturing large substrate capacitors for multi-chip module applications and the like using procedures compatible with common semiconductor fabrication procedures. A capacitor is formed where the top electrode thereof is divided into a plurality of segmented pads which are initially electrically isolated from one another. Each segmented pad forms a capacitor with the underlying dielectric layer and bottom capacitor electrode. Each segmented capacitor is electrically tested, and defective ones are identified. A conductive layer is thereafter formed over the segmented pads such that the conductive layer is electrically isolated from the pads of defective capacitors. The conductive layer electrically couples the good capacitors in parallel to form a high-value bypass capacitor which has low parasitic inductance. Large embedded MCM bypass capacitors can thereby be fabricated with minimal impact to the overall manufacturing yield. Novel testing methods within a scanning electron microscope environment are also disclosed.
摘要:
Systems for controlling the current consumption of an integrated circuit chip and the like so as to reduce the inductive voltage drops occurring over the power supply lines within the chip and power supply lines to the chip are disclosed. The systems according to the present invention are applicable to circuits having two or more sub-circuits formed on a semiconductor substrate, each sub-circuit having two or more power supply inputs. An exemplary system comprises two or more current shunting elements formed on the substrate, with each current shunting element coupled in parallel with the power supply inputs of a selected sub-circuit. The system has at least two main power supply lines formed on the semiconductor substrate, with each selected sub-circuit having each of its power supply inputs coupled to a main power supply line. A current shunting element may comprise a Zener diode, an active shunt circuit, or equivalents thereof.
摘要:
A power distribution structure for a multichip module and a method for fabricating the same are shown. According to the method of the present invention, a base plate is provided, a plurality of mesas arranged in a pattern are formed on the base plate, the mesas having electrically conductive upper surfaces which lie substantially in a single plane. A thin, conformal dielectric layer is then formed over the exposed surfaces of the mesas and the support base and a conductive material is deposited over the dielectric material filling the area between and surrounding the mesas. The resulting structure is then planarized, as by polishing, such that the upper surfaces of the mesas and the upper surface of the conductive material surrounding the mesas lie in substantially one plane and are electrically isolated from each other by the dielectric material. A multilayered thin film structure for a multichip module may then be formed over the power distribution structure and power and ground potentials supplied to microelectronic components, such as integrated circuit chips, mounted on the surface of the thin film structure using vias routed through the thin film structure.
摘要:
A holder for field glasses has a pair of substantially similar resilient receptacles that each has a main body with an open bottom and a narrower neck with an open top. A slot is located in each neck portion while a slit extends between each slot and its respective open bottom. The two receptacles are attached to each other so as to be parallel to one another and so that each slit generally faces the other receptacle. A pair of binoculars is inserted, ocular lens side first, through the bottoms of each main body by gapping each receptacle with the bridge of the binoculars passing through the gapped slits. Once the bridge is received within the slots of the two receptacles, the slits are degapped. Alternately, the binoculars themselves may have the form of a pair of drink receptacles.
摘要:
Disclosed is a redistribution layer having a patterned metallization layer for use in a flip chip integrated circuit device and a method for making the same. The redistribution layer includes a plurality of slot pads arranged along a periphery of the redistribution layer. The plurality of slot pads are formed from the patterned metallization layer. An array of bump pads are arranged in an inner portion of the redistribution layer such that the plurality of slot pads surround the array of bump pads, and the array of bump pads are formed from the patterned metallization layer. The redistribution layer further includes a plurality of traces that are formed from the patterned metallization layer and are configured to interconnect the plurality of slot pads to the array of bump pads. Each of the traces has a width that is selected to substantially equalize a resistance parameter associated with each of the plurality of traces. Additionally, each trace may include a bump pad area and possibly capacitance extending stubs that may be custom sized to substantially equalize a capacitance parameter associated with each of the plurality of traces.
摘要:
An apparatus for regulating resonance in a micro-chip has been developed. The method includes connecting a de-coupled capacitance across the supply and ground voltages, and connecting a band-pass shunt regulator that is in parallel to the capacitor across the supply and ground voltages. The regulator will short circuit the supply and ground voltages at a pre-determined frequency to reduce the resonance effect on the micro-chip.
摘要:
A power distribution structure for a multichip module including, a base plate, a plurality of mesas arranged in a pattern are formed on the base plate, the mesas having electrically conductive upper surfaces which lie substantially in a single plane. A thin, conformal dielectric layer is formed over the exposed side surfaces of the mesas and the exposed surfaces of the support base and a conductive material is deposited over the dielectric material filling the area between and surrounding the mesas. The upper surfaces of the mesas and the upper surface of the conductive material surrounding the mesas lie in substantially one plane and are electrically isolated from each other by the dielectric material. A multilayered thin film structure for a multichip module may be formed over the power distribution structure and power and ground potentials supplied to microelectronic components, such as integrated circuit chips, mounted on the surface of the thin film structure using vias routed through the thin film structure.
摘要:
A multi-layer printed wiring board design method employs establishing of critical and non-critical signal layers with first and second design rule sets assigned respectively. A configuration employing y x y' layers wherein conductors in the y and y' layers are orthogonal to x layers and y' layers are offset by approximately one-half pitch from y layers for cross talk reduction.
摘要翻译:多层印刷线路板设计方法采用分别指定的第一和第二设计规则集建立关键和非关键信号层。 使用y x y'层的结构,其中y和y'层中的导体与x层正交并且y'层从y层偏移大约一半的间距以进行串扰降低。
摘要:
A method for reducing a magnitude of a rate of current change of an integrated circuit is provided. The method uses a plurality of transistors controlled by a finite state machine, such as a counter, to gradually reduce current sourced from a power supply. Further, the finite state machine is controlled by a micro-architectural stage that determines when the integrated circuit needs to be powered down.