Semiconductor package having a heat sink with an exposed surface
US6246115A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1999 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Oct 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/19041
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
An integrated circuit package with a fully-exposed heat sink is provided. The integrated circuit package includes a substrate having a first side being formed with first conductive traces and a second side being formed with second conductive traces. At least one chip is mounted on the substrate and electrically connected to the first conductive traces. A plurality of solder balls are provided at the terminal ends of the second conductive traces to allow external connection of the chip. The fully-exposed heat sink is mounted on the substrate. The heat sink is formed with a plurality of supportive legs arranged in such a manner as to allow a bottom surface of the heat sink to be separated from the chip and a top surface of the heat sink to be tightly attached to a cavity in a mold used to form an encapsulant for enclosing the chip. A plurality of positioning tongues are formed on the heat sink for securing the heat sink in position when performing a molding process for forming the encapsulant. With this integrated circuit package, no jig is required in the assembly of the integrated circuit package. Moreover, since there is no need to use adhesives to adhere the supportive legs onto …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.