PCB PRINTED CIRCUIT BOARD


A printed circuit board mechanically supports and electrically connects electrical or electronic components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a non-conductive substrate.

Effect of an image plane on printed circuit board radiation
free download

The effect of placing a conducting plane beneath a printed cir-cuit board (PCB)¡ s analyzed. Experimental results illustrate that when the plane was close to the PCB, the ground-noise voltage and radiated emissions were significantly reduced. This conducting plane is called

A practical guide to high-speed printed – circuit – board layout
free download

Page 1. Th W ld L di Hi h P f Si l P i S l ti The World Leader in High Performance Signal Processing Solutions A Practical Guide to High-Speed Printed Circuit Board Layout John Ardizzoni Dennis Falls Analog Devices Avnet Electronics Marketing Page 2. Agenda Schematic

Printed circuit board design guidelines for ball grid array packages
free download

This paper is a printed wiring board layout guide for designing system cards which incorporate ball grid array packages. The differences in designing for plastic and ceramic ball grid arrays is emphasized as well as wiring patterns for reducing the number of circuit

Metals content in printed circuit board waste
free download

This paper an presents analysis of metals in waste of printed circuit boards (PCB) covering types of PCB, segregated from PC computers, mobile phones, and mixed. The presented data identifies metals and other substances found in PCB waste based on elemental and

A semi-analytical method to predict printed circuit board package temperatures
free download

In this paper, a quick, easy-to-use method is developed to predict steady-state temperatures on printed circuit boards (PCBs) subjected to heating by single or multiple heat sources. The method includes separate analytical solutions for the circuit board and for the chips to be

Computer vision system for printed circuit board inspection
free download

In this paper we present a Computer Vision system for printed circuit board (PCB) automated inspection. In the last years PCB industry has been invested in manufacturing automation improvement. This is known, especially in measurement and inspection field. We can note

Wavelet-based printed circuit board inspection system
free download

An automated visual printed circuit board (PCB) inspection system proposed in this paper is designed specifically to detect various types of defects occurred during circuit printing process in manufactory. Two-dimensional HAAR wavelet transform is incorporated in the

An algorithm to group defects on printed circuit board for automated visual inspection
free download

Due to disadvantages in manual inspection, an automated visual inspection system is needed to eliminate subjective aspects and provides fast and quantitative assessment of printed circuit board (PCB). Up to the present, there has been a lot of work and research

Using metal core printed circuit board (MCPCB) as a solution for thermal management
free download

Thermal conductivity is a material property that describes the ability of a material to conduct heat after the heat has entered the material. As shown in Table conventional PCB materials such as FR4 and PI share the lowest thermal conductivity and are not capable of

Characterization of a printed circuit board via
free download

This paper describes the characterization of a printed circuit board via connecting two semi- infinitely long microstrip transmission lines above a ground plane. An equivalent circuit is developed to fully characterize the via. The equivalent circuit is given consisting of excess

Copper extraction from the discarded printed circuit board by leaching
free download

This project deals with the experimental results of the leaching of Cu from Printed Circuit Boards (PCB) from obsolete electronic devices by means of leaching using different combinations of acidic mixtures followed by precipitation. Printed circuit boards were

A new test strategy for complex printed circuit board assemblies
free download

The trend in Printed Circuit Board Assembly (PCBA) technology is towards higher complexity. Many boards have significantly more components and solder joints today than just a few years ago. More components and more solder joints means more defect

A planar UWB monopole antenna formed on a printed circuit board
free download

A monopole antenna is known as an antenna that can implement low VSWR in wide bands. In a design where the height of the monopole unit is 1/4 the wavelength of the minimum frequency or more and the shape (tear drop) and dimensions are optimized, a VSWR 1.3 in

Automatic Drilling Machine for Printed Circuit Board
free download

Using Printed Circuit Board (PCB) in the electronics instrumentation is common. In the experiment phase, not the final phase, one has to drill the hole and via by himself. The number of holes and vias in the PCB influence the speed of drilling time if it is done

Optimisation of surface mount device placement machine in printed circuit board assembly
free download

Over the last 20 years, PCB ( printed circuit board ) production has evolved from a labour- intensive activity to a highly automated activity (Crama et al.). Surface Mount Technology (SMT) has almost replaced pin-through-hole technology for PCB assembly and

Electrochemical migration failure of the copper trace on printed circuit board driven by immersion silver finish
free download

With lead-free legislation impacting printed circuit board (PCB) manufacturing, immersion silver (ImAg) finish is adapted as the top finish of copper trace on PCB due to its many advantages. However, it is easy for silver to form electrochemical migration (ECM) in high

An algorithm for classification of five types of defects on bare printed circuit board
free download

This paper presents a technique for classification of five types of defect on bare printed circuit board (PCB). Due to decisions made by human inspectors often involve subjective judgment, in addition to being intensive and therefore costly, an automated approach for

Detection of faulty region on printed circuit board with IR thermography
free download

This paper presents detection of faulty region of PCB by thermal image processing. Thermal imaging is used for analysis of thermal reliability of PCB. With variation in temperature fault can be detected. To detect faulty region, thermal image of a faultless PCB and faulty PCB is

A printed circuit board inspection system with defect classification capability
free download

An automated visual printed circuit board (PCB) inspection is an approach used to counter difficulties occurred in humans manual inspection that can eliminates subjective aspects and then provides fast, quantitative, and dimensional assessments. In this study, referential

Separation of printed circuit board by temperature shock
free download

In this contribution we are dealing with the possibility of electronic waste separation by temperature effect. It gives a possible direction how to solve the problem of increasing with electronic waste not only in Czech Republic, but also throughout the world. Further, we are