Please use this identifier to cite or link to this item:
Title: A feasibility study on manufacturing of embedded capacitors and resistors in multi-layer printed circuit boards
Authors: Lee, Hung-fai
Keywords: Hong Kong Polytechnic University -- Dissertations
Printed circuits -- Design and construction
Electronic circuit design
Electric resistors
Issue Date: 2006
Publisher: The Hong Kong Polytechnic University
Abstract: Embedding capacitors and resistors into printed circuit boards (PCB) offers many benefits over Surface Mount Technology (SMT) and Through-Hole Packaging (PTH). These benefits include improvement in electrical performance and reliability, and potential cost reduction. Embedded devices also enable signal integrity at speeds over 1 GHz. Also, replacement of surface mounted discrete passives with an embedded passives layer allows for tighter component spacing, fewer via hole counts and a larger routing area. All these are essential for board miniaturization. However, the goals of reliability improvement, space conservation, performance enhancement and solder joint reduction by using embedded passives can only be realized if the PCB fabricator can produce quality boards in a practical production environment in a timely manner. This project investigated the manufacturing of embedded resistors and capacitors on a prototype basis with the possibility of it being extendable to normal mass production. The sequential lamination technique has been applied to form a PCB with embedded passives in this project. To verify the manufacturing capability, samples of integrated planar resistors and buried capacitors were fabricated on specially designed PCB test panels. The results showed that by using the 50Ω/□ Ohmega-Ply resistivity material, resistors with a 0.5 mm minimum size dimension could be produced with a yield rate of 99%. The average tolerance was below 4% at the resistor core fabrication stage and the embedded resistors after integration showed increments in resistance of around 5% to 20%. In terms of embedded capacitors, the capacitive material namely C-Ply with a capacitance of 0.775 nF/cm² (5 nF/in² ) was used. The results were satisfactory as the measurements showed a maximum average tolerance of 5.7% before integration and a slight improvement to 4.5% after integration. In conclusion, the embedded resistors and capacitors were successfully built with a high yield rate to 99% and the tolerance of embedded resistor and capacitor were maintained at around 5% to 20% before and after PCB lamination.
Description: xiii, 217 leaves : ill. (some col.) ; 30 cm.
PolyU Library Call No.: [THS] LG51 .H577M ISE 2006 Lee
Rights: All rights reserved.
Appears in Collections:Thesis

Files in This Item:
File Description SizeFormat 
b2059267x_link.htmFor PolyU Users162 BHTMLView/Open
b2059267x_ir.pdfFor All Users (Non-printable) 8.13 MBAdobe PDFView/Open
Show full item record
PIRA download icon_1.1View/Download Contents

Page view(s)

Last Week
Last month
Citations as of Oct 15, 2018


Citations as of Oct 15, 2018

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.