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Heatsink and Waterblock Lapping Guide - Heatsink and Waterblock Lapping Guide
Mon, February 24 2003 | 2:17AM | PermaLink Feedback?
"Lapping is an abrasive process used to dress the base of a heatsink or waterblock until the bottom surface is flat and smooth. It is used to promote better heat transfer. The metal base may look smooth but it is actually filled with microscopic peaks, valleys, scratches and pits. Few surfaces are perfectly flat. Lapping minimizes the surface irregularities, thereby increasing the available contact area. The following simple drawing shows two surfaces. The one on the left is how a surface might look before lapping and the one on the right after lapping. Lapping removes the microscopic mountaintops and produces relatively flat plateaus. Entire microscopic mountain ranges may need to be ground down in order to increase the available contact area."
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