Heat sink structure with pyramidic and base-plate cut-outs
US6622786B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2002 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Apr 17, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A heat sink structure is formed by stacking a plurality of heat sink layers. Each layer comprises an array of vertically disposed heat dissipating elements extending from a base plate. Cut outs are formed in each of the base plates to form openings so that when the layers are stacked, each of the ascending successive layers has a larger opening than the layer upon which it rests. Cooling may be by forced air or natural convection. With forced air, air impinges on the top of the stack and into the opening in the base plates. Because of diminishing size of the openings in the stack, a portion of the air is forced out the sides of each layer. With natural convection, air is drawn into the sides of each layer and the hot air at the center flows upwardly through the openings with increasing volume as it rises.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.