Experimental modal analysis of PBGA printed circuit board assemblies

Since the level of vibration always depends on the natural frequencies of the system, it is important to know the modal parameters of such system to control failure and provide prevention actions. The demand for structurally reliable Printed Circuit Boards (PCB) has increased as more functions are required from electronic products along with less weight and smaller size. This imposes certain limitations and critical requirements. In this paper, investigation on the dynamic characteristics of CEM-1 Single-layer PCB using Operational Modal Analysis (OMA, or often called Output-Only or Ambient Modal analysis), is presented. The Frequency Domain Decomposition (FDD) and Enhanced Frequency Domain Decomposition (EFDD) techniques are applied on the PCB with free-free end condition. Comparison of results between both techniques and also with the result from Experimental Modal Analysis (EMA), will be shown. The understanding on dynamic behaviour of this structure provides valuable insight into the nature of the response and remarkable enhancement of its model, strength and vibration.

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Modal Analysis and Structure Optimization of a Printed Circuit Board NC Drilling Machine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.385-386.320 ◽

2013 ◽

Vol 385-386 ◽

pp. 320-323

Author(s):

Jia Wei Zhu ◽

Shi De Xiao ◽

Jian Feng ◽

Xiang Yin Meng ◽

Ming Ming Jiang

Keyword(s):

Machine Tool ◽

Modal Analysis ◽

Dynamic Property ◽

Primary Structure ◽

Printed Circuit Board ◽

Structure Optimization ◽

Influential Factors ◽

Circuit Board ◽

Drilling Machine ◽

Printed Circuit

The solid modeling of one type of printed circuit board NC drilling machine is built by Pro/Engineer, and ANSYS is applied for modal analysis. In this paper, the key influential factors of the structure of the drilling machine are found out, the structure is improved and two prioritization schemes are proposed. After analyzing the primary structure and the two optimized structures of the machine tool bed and then comparing the analysis results, the optimal scheme is proposed. The results show that the optimization improves the dynamic property and the machining precision of the drilling machine.

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406. An Ergonomic Hazards Survey of Printed Circuit Board Factories

10.3320/1.2765087 ◽

1999 ◽

Author(s):

C. Lu ◽

S. Wang ◽

C. Wei ◽

S. In

Keyword(s):

Printed Circuit Board ◽

Circuit Board ◽

Printed Circuit

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Characteristics of Radiated Emission from a Printed Circuit Board with a Slit

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.132.404 ◽

2012 ◽

Vol 132 (6) ◽

pp. 404-410 ◽

Cited By ~ 2

Author(s):

Kenichi Nakayama ◽

Kenichi Kagoshima ◽

Shigeki Takeda

Keyword(s):

Printed Circuit Board ◽

Circuit Board ◽

Printed Circuit ◽

Radiated Emission

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Confirming the Signal Integrity in Transmission of Digital Signals on Microstrip Straight Circuits via the Eye Diagrams

JOURNAL OF ADVANCES IN PHYSICS ◽

10.24297/jap.v5i1.1972 ◽

2014 ◽

Vol 5 (1) ◽

pp. 737-741

Author(s):

Keyword(s):

Integrated Circuits ◽

Printed Circuit Board ◽

Signal Integrity ◽

High Volume ◽

Information Storage ◽

Circuit Board ◽

Electromagnetic Simulation ◽

Electronic Systems ◽

Digital Signals ◽

Printed Circuit

Because of the high volume of processing, transmission, and information storage, electronic systems presently requires faster clock speeds tosynchronizethe integrated circuits. Presently the â€œspeedsâ€ on the connections of a printed circuit board (PCB) are in the order of the GHz. At these frequencies the behavior of the interconnects are more like that of a transmission line, and hence distortion, delay, and phase shift- effects caused by phenomena like cross talk, ringing and over shot are present and may be undesirable for the performance of a circuit or system.Some of these phrases were extracted from the chapter eight of book â€œ2-D Electromagnetic Simulation of Passive Microstrip Circuitsâ€ from the corresponding author of this paper.

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