Browse Prior Art Database

Processor Heatink with Slotted Fins

IP.com Disclosure Number: IPCOM000015911D
Original Publication Date: 2002-Oct-11
Included in the Prior Art Database: 2003-Jun-21
Document File: 3 page(s) / 184K

Publishing Venue

IBM

Abstract

With rising processor power dissipation and the decreasing allowable maximum processor case temperature, immediate cooling design improvements are critical for system survival. The "Processor Heatink with Slotted Fins" is designed to incorporate significant improvements in todays cooling capabilities with little design changes.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 67% of the total text.

Page 1 of 3

Processor Heatink with Slotted Fins

    With rising processor power dissipation and the decreasing allowable maximum processor case temperature, immediate cooling design improvements are critical for system survival. The "Processor Heatink with Slotted Fins" is designed to incorporate significant improvements in todays cooling capabilities with little design changes.

The "Processor Heatink with Slotted Fins" invention has 6 advantages over a comparable heatsink without slotted fins:
1) Increased Surface Area - More area for heat spreading than with a heatsink of same design without slotted fins (taking away 0.3mm of material while exposing 0.4mm of material in cross section).
2) Reduced Impedance - Allows greater volumetric airflow.
3) Cross Flow between Fins - Heated air originally trapped between fins can escape through fin slots.
4) Reduced Pressure Drop - Allows greater volumetric airflow.
5) Reduced Weight - Removal of material from the fins reduces the weight.
6) Boundary Layer Reduction - Turbulent air flow reduces the amount of laminar boundary layer formation.

Figure 1. Fansink Assembly Showing Slits in Side of Fins

1

[This page contains 62 pictures or other non-text objects]

Page 2 of 3

Figure 2. Single Fansink Fin Showing 0.3mm Wide Slits

Figure 3. Fan Airflow in Fansink without Slotted Fins

2

[This page contains 124 pictures or other non-text objects]

Page 3 of 3

                           Figure 4. Fan Airflow in Fansink with Slotted Fins Airflow delivered by an impinging fan is able to escape from the slots in the fins and through the two open ends.

Figure 1 above shows the "Processor Heatink with Slotted Fins" with the 0.4mm thick fins and the multiple 0.3mm wide slots in each fin. This design is unique due to the fact that while material is removed from the fins, cross sectional surface area is ex...