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Investigation of in-situ mechanical and chemical etching: A milder hydrometallurgical approach for Au, Ni, and Cu recovery from printed circuit boards
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Printed Circuit Board (PCB) Electrical Characterization
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Design and Characterization of a Printed Circuit Board-Based Gas Chromatography Column for Greenhouse Gas Analysis
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Exploring Power and Frequency Limits of Printed Circuit Board Dispersive Nonlinear Transmission Lines
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Exploration of Fast High Voltage Pulse Generators for Printed Circuit Board Nonlinear Transmission Lines
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Vibration test for printed circuit card connectors
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Multilayered printed circuit boards inspected by X-ray laminography
Technique produces high resolution cross-sectional radiographs with close interplane spacing for inspecting multilayer boards to be used in providing circuitry routing and module structural support.
Investigation of multilayer printed circuit board materials
Fabrication and environmental tests of circuit boards with polyimide plastic dielectrics and pyrolyzed polyacrylonitrile conductors
Development of nondestructive testing techniques for plated-through holes in multilayer printed circuit boards
The development of a nondestructive test with the capability to interrogate plated-through holes as small as 0.51 millimeters inside diameter is discussed. The system can detect defects such as holes, voids, cracks, and thin spots that reduce the current carrying capability of plates-through interconnects by 20 percent or more. Efforts were directed toward the design and fabrication of magnetic circuitry mutual coupling probes and to evaluate the effectiveness of these devices for detecting in multilayer board plated-through holes.
Printed-circuit solar-cell array
Flexible solar-cell array is made thinner and lighter by placing array on substrate which is a lamination of two sheets of plastic film with etched electrical connector for cells between films.
Printing circuits without a mask
Proposed technique uses electronically controlled electrode/nozzle to deposit fine-line metallic patterns.
Printed Circuit Converts RF Energy to dc Power
Ultra-light-weight, large area, antenna/rectifier has 85 percent conversion efficiency. System consists of large number of repetitive circuits called "rectenna elements." Each element produces 2 W of power, comprises half-wave dipole, input filter, and Schottky barrier dipole. Two-wire microwave transmission lines act as dc power collecting buses.
Crossover Concept for Optical Printed Circuits
It is possible to reduce crosstalk between optical signals in intersecting optical conductors by taking two steps: Minimize amount of light diffracted into wrong conductor by selecting optimum conductor width, and place light traps in each conductor. How well techniques work depends in part on quality of optical conductors (partically surface smoothness) and on how closely optical-signal mode of propagation approaches ideal. Nature of signals also important: With digital signals, less crosstalk attenuation required than for analog signals.
Printed Circuit Board Design (PCB) with HDL Designer
Contents include the following: PCB design with HDL designer, design process and schematic capture - symbols and diagrams: 1. Motivation: time savings, money savings, simplicity. 2. Approach: use single tool PCB for FPGA design, more FPGA designs than PCB designers. 3. Use HDL designer for schematic capture.
Workmanship Risks: Reworking Printed Circuit Board (PCB) Solder Joints
No abstract available