Method of making an assembly package having an air tight cavity and a product made by the method
US5943558A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 23, 1996 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Sep 23, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/181
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A method of making an assembly package having an air tight cavity for housing an electronic element such as a GaAs semiconductor chip. The method includes the formation of a dielectric base by placing a placing a conductive lead frame comprising a frame pad and a plurality of conductive leads inside a die having a top interior surface and a bottom interior surface, injecting a thermally setting liquefied epoxy into die cavity, curing the epoxy and removing the die. The die includes at least one post which protrudes toward the die's top interior surface such that the top surface of the post presses the inner end of each of said plurality of conductive leads against the top interior surface of the die, and also includes a pin protruding from the die's top interior surface toward the post's top surface. The post firmly holds the conductive leads in a common level plane during the injection of the epoxy into the cavity while the use of the pin results in a the formation of a pin hole in the dielectric base. Once the dielectric base is formed, the conductive leads and frame pad are plated and bonded to the electronic element. A thermally setting liquefied epoxy thereafter is dispensed o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.