NDLI: The "Stealth" decoupling capacitor

Content Provider	IEEE Xplore Digital Library
Author	Schaper, L. Ulrich, R. Nelms, D. Porter, E. Lenihan, T. Wan, C.
Copyright Year	1997
Description	Author affiliation: High Density Electron. Center, Arkansas Univ., Fayetteville, AR, USA (Schaper, L.)
Abstract	A new method of construction for a decoupling capacitor with excellent high frequency properties is described. Previous work has demonstrated the poor high frequency performance of conventional chip capacitors, because of their high internal inductance. Capacitors commonly used for decoupling in systems with clock frequencies in the tens of MHz, and thus substantial noise components in the hundreds of MHz, are self-resonant below 25 MHz. They are useless for maintaining low power supply impedance at frequencies above 100 MHz. The new capacitor construction allows capacitors of 25-50 nF to maintain low impedance into the range of several GHz. These capacitors will be useful for both single chip and multichip packaging. Because of very flexible connection options, low inductance connections into package power distribution planes are easily realized. This paper presents the construction details of the new capacitor, as well as test results on devices which have been fabricated. Materials are discussed, and manufacturing methods which should allow the production of the capacitor at very low cost are presented. Various means of using the capacitor in packages are illustrated. Because at high frequencies everything goes in and nothing comes out of the new capacitor, it has been nicknamed "Stealth".
Starting Page	724
Ending Page	729
File Size	720434
Page Count	6
File Format	PDF
ISBN	078033857X
ISSN	05695503
DOI	10.1109/ECTC.1997.606250
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitors Frequency Packaging Inductance Impedance Clocks Power supplies Power distribution Testing Manufacturing
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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