Browse Prior Art Database

Perforated Metal Fins

IP.com Disclosure Number: IPCOM000119469D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 1 page(s) / 50K

Publishing Venue

IBM

Related People

Mok, LS: AUTHOR

Abstract

Disclosed is an air-cooled heat sink made of perforated metal fins which is shown in the attached figure. The heat sink is placed on an electronic package mounted on a printed wiring board. Air flows perpendicularly to the fins as indicated in figure. The fins are first cut in shape from perforated metals sheets and then held together by means of brazing or epoxies. The spacing between fins and the size of the holes on the fins can be adjusted to gain the best cooling performance in a given cooling environment. Even the shape of the holes can be tailored to boost the performance. The holes of each fin can be aligned in a straight line or they can be staggered. As shown in the figure, the fins are made wider than the package itself in order to catch more cool air for better cooling.

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Perforated Metal Fins

      Disclosed is an air-cooled heat sink made of perforated metal
fins which is shown in the attached figure.  The heat sink is placed
on an electronic package mounted on a printed wiring board.  Air
flows perpendicularly to the fins as indicated in figure.  The fins
are first cut in shape from perforated metals sheets and then held
together by means of brazing or epoxies.  The spacing between fins
and the size of the holes on the fins can be adjusted to gain the
best cooling performance in a given cooling environment. Even the
shape of the holes can be tailored to boost the performance. The
holes of each fin can be aligned in a straight line or they can be
staggered.  As shown in the figure, the fins are made wider than the
package itself in order to catch more cool air for better cooling.
Heat travels directly up from the package to the ends of the fins
without going through the base plate of the heat sink, such as in the
cases of straight and pin-fin heat sinks.  Since there is no base
plate under the extended portion of the fins, no air will be blocked
by the base plate and no adverse thermal effect will be added to
those components right under the extended portion of the fins.

      Disclosed anonymously.