Heat spreader structures for enhanced heat removal from both sides of chip-on-flex packaged units
US6219243A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1999 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Dec 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/10734
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
An enhanced heat dissipation device for a chip-on-flex packaged unit includes a flex circuit material attached to a front side of an integrated circuit die. The flex circuit material further attached to a bottom side of a printed circuit board having an opening to expose the flex circuit material. A top heat spreader thermally coupled to the flex circuit material through the opening in the printed circuit to dissipate heat from the front side of the integrated circuit die. The device further includes a bottom heat spreader, that is thermally coupled to back side of the integrated circuit die, to dissipate heat from the back side of the integrated circuit die. This enables the heat dissipation device to dissipate heat from both the front side and back side of the integrated circuit die, and thereby enhancing the heat dissipation for a given unit surface are of the integrated circuit die without increasing the volume of the heat dissipation device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.