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Showing 1 to 20 of 102 for “"printed circuit boards"”.
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Multi-connection vias for printed circuit boards
… the integrity of high-frequency signals through circuit boards becomes increasingly challenging. The dimensions and material parameters of in-plane circuit board features, such as striplines, microstrips and co-planar waveguides are tuned to control signal impedance. Conventional multi-layer …
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Microwave Overlay Capacitor Fabrication on Printed Circuit Boards
… ferroelectric thick films, and planarization of printed circuit boards (PCB) using soldermask to allow for film deposition which was not reported in the literature. A new method to have the PCB prepared appropriately at the manufacturing stage was employed. A bandpass filter on PCB was designed …
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Clustering Algorithms for Component Placement in Printed Circuit Boards
In 2024, approximately 12 billion printed circuit boards (PCBs) were manufactured globally [1], with the trend increasing gradually, and the majority of PCB layouts still being completed manually. The manual design process amounts to millions of hours of tedium that can be eased with automation. …
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Minimizing machine set-up time when manufacturing printed circuit boards.
… placement machines for the production of Printed Circuit Boards (PCBs). However, when these fast machines have to assemble small volumes of many different types of circuit boards, the machine set-up time becomes much more important than the assembly rate of each board. In order to minimize …
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Numerical modelling of electrodeposition process for printed circuit boards manufacturing
Printed circuit boards (PCBs) are used extensively in electronic products to connect assembled components within a system. The so-called vertical interconnect access (via) is a vertical hole or cavity in the PCB filled with metal to facilitate conductivity. The current trend, particularly for high …
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High-frequency characterization of embedded components in printed circuit boards
… technology, where chips are placed inside of the printed circuit board instead of on top. The advantage of this technology is the reduced electronic interconnection length between components. The shorter this connection, the faster the signal transmission can occur. Different high-frequency …
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Fast Heuristic Techniques for Placing and Wiring Printed Circuit Boards
Made available in DSpace on 2014-12-10T20:13:40Z (GMT). No. of bitstreams: 1 7317438.pdf: 4446957 bytes, checksum: f25b8dc9bf5ea550e5fe43f231384f7d (MD5) Previous issue date: 1972
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Precise registration methods in the manufacture of printed circuit boards
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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Measurement and Analysis of High Frequency Resonances In Printed Circuit Boards
<p>Though the printed circuit board (PCB) industry advances much more slowly compared to silicon density, the signaling rates of PCBs must continue to scale so that platforms can take advantage of these higher performing processors. The nature of the materials used to make these boards is not well …
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Characterization of boundary conditions for wedge-lock-mounted printed circuit boards
… first eight natural frequencies of a rectangular circuit board (with no components soldered to it, and with wedge locks along two edges) will be empirically determined. Eight frequencies will be used to solve for four unknowns: continuously distributed translational and rotational spring …
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Sustainable methodologies to transform non-metallic printed circuit boards waste into value-added products
… be adopted to substantially recycle the e-waste. Printed circuit boards (PCBs) is prevalent in almost all of the electronic components and it is majorly categorised into FR-2 (single/double sided PCBs) and FR-4 (multi-layered PCBs). The substrates in FR-2 types are composed of phenol formaldehyde …
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Investigation of a hydrometallurgical process route to recover metals from waste printed circuit boards
… (WEEE). Most of these metals in WEEE are on the printed circuit boards (PCBs). This study aims to compare different pre-treatment methods to recycle copper from PCBs using a hydrometallurgical process. In order to obtain a uniform/consistent sample across all the tests done, similar custom-made …
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Strategy and manufacturing flexibility : a case study on the assembly of printed circuit boards
Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, 1992.
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Recovery of rare earth elements (REE) from waste printed circuit boards (WPCBs) through heterotrophic bioleaching
… REE recycling rates remain below 1%. Waste printed circuit boards (WPCBs) represent a valuable source of critical materials (e.g., Cu, Au, REE). However, the recovery of REE from WPCBs has received comparatively less attention until now. The overall aim of this research was to investigate …
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An Intent-based Neural Monte Carlo Tree Search Framework for Synthesis of Printed Circuit Boards
PCB Synthesis is a difficult joint optimization problem that has eluded automation in Electronic Design Automation (EDA) industry until now. Past approaches to create algorithms that intelligently learn to solve these problems have not yet widely been seen. Cadence Design Systems, affiliated with …
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RECYCLING OF PRECIOUS METALS FROM WASTE PRINTED CIRCUIT BOARDS VIA A COMBINATION OF PYRO AND HYDROMETALLURGICAL PROCESSES
… development of innovative recycling techniques. Printed Circuit Boards (PCBs) are among the most complex components of e-waste, consisting of a diverse mix of metals, polymers, and ceramics. Recycling PCBs is crucial for managing hazardous waste and recovering valuable materials, as they contain …
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Assessment of a Shredding Technology of Waste Printed Circuit Boards in preparation for Ammonia-based Copper leaching
… being regarded as a secondary resource or waste. Printed circuit boards (PCBs) are a valuable fraction of e-waste, made up of tightly laminated metal-polymer composites containing several base and precious metals which makes them attractive to recyclers. Hydrometallurgy is a widely explored …
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A Comparative Analysis of Experimental and Computational Methods for Evaluating Partial Discharge Inception Voltage on Printed Circuit Boards
… in the literature pertains to the design of printed circuit boards (PCBs) for these voltage levels. This thesis investigates the likelihood of PD behavior in HV PCBs and evaluates the suitability of existing design guidance for avoiding this behavior in the implementation of HV PCBs. As part …
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