Abstract:
A communication device contains multiple microphones that receive acoustic signals from a user and from the background. The acoustic signals from the user are enhanced using the background acoustic signals to reduce background noise. The enhanced signals are transmitted to an emergency network when an emergency call is made from the communication device. The raw signals are stored in the communication device for later retrieval or are transmitted simultaneously with the enhanced signals. The enhanced signals are transmitted using a circuit-switched voice mode while the raw signals are transmitted using a packet-switched voice mode.
Abstract:
A communication device contains multiple microphones that receive acoustic signals from a user and from the background. The acoustic signals from the user are enhanced using the background acoustic signals to reduce background noise. The enhanced signals are transmitted to an emergency network when an emergency call is made from the communication device. The raw signals are stored in the communication device for later retrieval or are transmitted simultaneously with the enhanced signals. The enhanced signals are transmitted using a circuit-switched voice mode while the raw signals are transmitted using a packet-switched voice mode.
Abstract:
Printed circuit boards with integral high and low value resistors are efficiently produced. The method of their manufacture entails applying a first layer of a low resistance material onto a dielectric substrate in a predetermined thickness and pattern. The pattern defines the electrical lengths and widths of low value resistors, as well as pairs of terminal electrode pads for the high value resistors. A second layer of a high resistance material is applied between and in contact with the top surfaces of the facing ends of each member of the terminal pad pairs. The fixed lengths, widths and thicknesses of the patterned high resistance material determine the values of the high value resistors. Conductive metal terminals are provided at the ends of the low value resistors and at the distal ends of the high value resistor pad pairs to complete the resistors.
Abstract:
A dielectric circuit board foil (400, 600) includes a conductive metal foil layer (210, 660), a crystallized dielectric oxide layer (405, 655) disposed adjacent a first surface of the conductive metal foil layer, a lanthanum nickelate layer (414, 664) disposed on the crystallized dielectric oxide layer, and an electrode layer (415, 665) that is substantially made of one or more base metals disposed on the lanthanum nickelate layer. The foil (400, 600) may be adhered to a printed circuit board sub-structure (700) and used to economically fabricate a plurality of embedded capacitors, including isolated capacitors of large capacitive density (> 1000 pf/mm²).
Abstract translation:电介质电路板箔(400,600)包括导电金属箔层(210,660),邻近导电金属箔层的第一表面设置的结晶介电氧化物层(405,655),镍酸镧层(414) ,664)和基本上由设置在镍酸镧层上的一种或多种贱金属制成的电极层(415,665)。 箔(400,600)可以粘附到印刷电路板子结构(700)上,并用于经济地制造多个嵌入式电容器,包括具有大电容密度(> 1000pf / mm 2)的隔离电容器。
Abstract:
A dielectric sheet (500, 600, 1621) includes a photodielectric support layer (505, 1630) that may be glass reinforced and a dielectric laminate (510, 605). The dielectric laminate includes first and second metal foil layers (415, 660; 210, 665, 1605, 1610), and a dielectric layer (405, 655, 1620) disposed between the first and second metal foil layers. The first metal foil layer is adhered to the photodielectric support layer. In a printed circuit and patch antenna that includes the dielectric sheet, the first metal layer is patterned by removal of metal according to a circuit pattern and the photodielectric support layer is patterned by removal of dielectric material according to the circuit pattern.
Abstract:
A printed circuit polymer thick film (PTF) resistor (410, 420) includes tolerance control material (425, 426, 440) that substantially surrounds the resistor body (423) and significantly improves the linearity of resistance vs. resistor length, and significantly reduces resistor-to-resistor and board-to-board fabrication variances. In one embodiment (420), the tolerance control material is the same metallic material as the printed circuit conductors (430), and is formed in two finger patterns on each side of the resistor body, each finger pattern connected to one terminal pad (435) of the resistor. A layout cell (700) is used for fabricating the PTF resistor. A method is used for fabricating the PTF resistor.
Abstract:
A thin-film metal resistor (44) suitable for a multilayer printed circuit board (12), and a method for its fabrication. The resistor (44) generally has a multilayer construction, with the individual layers (34, 38) of the resistor (44) being self-aligned with each other so that a negative mutual inductance is produced that very nearly cancels out the self-inductance of each resistor layer (34, 38). As a result, the resistor (44) has a very low net parasitic inductance. In addition, the multilayer construction of the resistor (44) reduces the area of the circuit board (12) required to accommodate the resistor (44), and as a result reduces the problem of parasitic interactions with other circuit elements on other layers of the circuit board (12).
Abstract:
A method for manufacturing a microelectronic assembly to have aligned conductive regions and dielectric regions, for example, for producing integral capacitors (32), generally entails providing a substrate (10) with a first conductive layer (12), forming a dielectric layer (14) on the first conductive layer, and then forming a second conductive layer on the dielectric layer (16). A first region of the second conductive layer is then removed to expose a first region of the dielectric layer, which in turn is removed to expose a first region of the first conductive layer that is also removed. From this process, the first regions of the conductive and dielectric layers are each removed by using the overlying layer or layers as a mask, so that the remaining second regions of these layers are coextensive.
Abstract:
A method for manufacturing a microelectronic assembly to have a resistor (12) on a circuit board (10). The method entails applying a photosensitive dielectric to a substrate (18) to form a dielectric layer. The dielectric layer is photoimaged to polymerize a first portion (22). An electrically resistive film (14) is then applied to the dielectric layer and the dielectric layer is developed so that a portion of the resistive film remains over the second portion to form the resistor. A second dielectric layer (32) is then applied, photoimaged and developed to form openings (34). Terminations (16) can then be formed in the openings by known plating techniques. The resistive film is preferably a multilayer film that includes an electrically resistive layer, such as NiP, NiCr or other nickel alloy and a sacrificial backing such as a layer of copper.
Abstract:
Printed circuit boards (6) with integral high and low value resistors (2 and 4) are efficiently produced. The method of their manufacture entails applying a first layer of a low resistance material (8) onto a dielectric substrate (6) in a predetermined thickness and pattern. The pattern defines the electrical lengths and widths of low value resistors (2), as well as pairs of terminal electrode pads (28 and 30) for the high value resistors (4). A second layer of a high resistance material (18) is applied between and in contact with the top surfaces of the facing ends of each member of the terminal pad pairs (28 and 30). The fixed lengths, widths and thicknesses of the patterned high resistance material determine the values of the high value resistors. Conductive metal terminals are provided at the ends of the low value resistors and at the distal ends of the high value resistor pad to complete the resistors.