Browse Prior Art Database

Capacitor With Integrated Rc Network for Multichip Modules

IP.com Disclosure Number: IPCOM000037774D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-30
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Rubin, BJ: AUTHOR

Abstract

Disclosed is a structure that makes it possible to determine which capacitors, in an array of capacitors connected in parallel on a multichip computer module, are electrically open.

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Capacitor With Integrated Rc Network for Multichip Modules

Disclosed is a structure that makes it possible to determine which capacitors, in an array of capacitors connected in parallel on a multichip computer module, are electrically open.

Arrays of capacitors are used to reduce power supply noise on multichip computer modules. To determine which capacitors, if any, are electrically open, a series RC network may be integrated into each capacitor. When the module voltage distribution network is driven by a high-frequency current source, power is dissipated only in the RC networks of those capacitors that are electrically connected. A thermal image of the module reveals which capacitors are not heated up and thus electrically open.

The figure shows the plate construction of a parallel plate capacitor. The plate is modified, through removal of conductor or material composition, to have a region of high resistance. At the end of this high resistance region is a small conductor area that forms a capacitor. The high resistance region forms the resistor of the RC network and the small conductor area forms the capacitor of the RC network. The RC network is in parallel with the capacitance of the unmodified plate area. The plate is electrically connected to the appropriate power supply of the module through the tab.

Disclosed anonymously.

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