Methods for forming semiconductor device packages
A semiconductor device package that incorporates a combination of ceramic, organic, and metallic materials that are coupled using silver is provided. The silver is applied in the form of fine particles under pressure and a low temperature. After application, the silver forms a solid that has a typical melting point of silver, and therefore the finished package can withstand temperatures significantly higher than the manufacturing temperature. Further, since the silver is an interfacial material between the various combined materials, the effect of differing material properties between ceramic, organic, and metallic components, such as coefficient of thermal expansion, is reduced due to low temperature of bonding and the ductility of the silver.
1. A method for forming a semiconductor device package, the method comprising:
forming a hole in a package substrate;
disposing a silver particle containing material in the hole;
placing a metal coin in the hole; and
performing a sintering process to convert the silver particle containing material into sintered silver, wherein the sintered silver couples the metal coin to the package substrate.
2. The method of claim 1 , wherein:
the package substrate is a printed circuit board.
3. The method of claim 1 , wherein disposing the silver particle containing material in the hole comprises:
applying fine particle silver in the hole.
4. The method of claim 1 , wherein disposing the silver particle containing material in the hole comprises:
applying nano-silver paste in the hole.
5. The method of claim 1 , wherein performing the sintering process comprises:
subjecting the semiconductor device package to a formation temperature lower than a melting point of silver.
6. The method of claim 5 , wherein:
the formation temperature is between 200 degrees Celsius and 300 degrees Celsius.
7. The method of claim 1 , further comprising:
attaching a semiconductor die to the metal coin with sintered silver.
8. The method of claim 1 , wherein:
the metal coin is a formed from a material selected from copper, aluminum, aluminum, AlSiC, Ag diamond, and copper graphite.
9. The method of claim 1 , further comprising:
applying a plating metal along edges of the hole.
10. A method for forming a semiconductor device package, the method comprising:
applying a silver particle containing material between a top surface of a base plate and a bottom surface of an insulative frame;
performing a sintering process to convert the silver particle containing material into sintered silver, wherein the sintered silver couples the bottom surface of the insulative frame to the top surface of the base plate; and
attaching a conductive metal lead to a top surface of the insulative frame.
11. The method of claim 10 , wherein applying the silver particle containing material comprises:
applying fine particle silver between the top surface of the base plate and the bottom surface of the insulative frame.
12. The method of claim 10 , wherein applying the silver particle containing material comprises:
applying nano-silver paste between the top surface of the base plate and the bottom surface of the insulative frame.
13. The method of claim 10 , wherein performing the sintering process comprises:
subjecting the semiconductor device package to a formation temperature lower than a melting point of silver.
14. The method of claim 13 , wherein the formation temperature is between 200 degrees Celsius and 300 degrees Celsius.
15. The method of claim 10 , wherein:
the insulative frame is formed from a ceramic material.
16. The method of claim 10 , further comprising:
forming a metallization layer on the bottom surface of the insulative frame.
17. The method of claim 10 , wherein:
the base plate comprises solid copper.
18. The method of claim 10 , wherein:
the base plate comprises at least one material selected from a copper-molybdenum-copper (CuMoCu) laminate, a copper, copper-molybdenum, copper (Cu(CuMo)Cu) laminate, and copper-tungsten (CuW).
19. The method of claim 10 , wherein attaching the conductive metal lead to the insulative frame comprises:
applying the silver particle containing material between the top surface of the insulative frame and the conductive metal lead; and
performing a sintering process to convert the silver particle containing material into sintered silver, wherein the sintered silver couples the conductive metal lead to the top surface of the insulative frame.
20. The method of claim 19 , wherein:
the conductive metal lead comprises solid copper.