Chip Scale Package structure with can attachment
A chip scale package (CSP) device includes a CSP having a semiconductor die electrically coupled to a plurality of solder balls. A can having an inside top surface and one or more side walls defines a chamber. The CSP is housed in the chamber and is attached to the inside top surface of the can. A printed circuit board is attached to the solder balls and to the one or more side walls to provide support to the CSP and to the can. The CSP may be a Wafer-Level CSP. The can may be built from a metallic substance or from a non-metallic substance. The can provides stress relief to the CSP during a drop test and during a thermal cycle test.
1. A method, comprising:
providing a frame including a top member and a plurality of wall members, wherein the plurality of wall members define a plurality of chambers, each chamber having an inside top surface;
attaching at least one chip scale package to the inside top surface of each chamber, each chip scale package having a front surface to which a plurality of solder balls are attached; and
cutting through the wall members of the frame to produce a plurality of chip scale package devices each having a surrounding wall formed from the wall members of the frame and a roof formed from the top member of the frame.
2. The method according to claim 1 , wherein the frame is made from a metallic substance.
3. The method according to claim 1 , wherein each wall has a length extending at least to the front surface of the attached chip scale package.
4. The method according to claim 1 , wherein cutting comprises dicing the frame through the walls and between the chambers into a plurality of metal cans, each metal can including at least one chamber containing at least one chip scale package, and each metal can having a peripherally surrounding side wall formed from the diced through walls of the frame.
5. The method according to claim 4 , wherein the peripherally surrounding side walls are spaced from an edge of the chip scale package by a distance.
6. The method according to claim 1 , wherein the chip scale package includes a metallic layer formed over a semiconductor die, the solder balls being attached to the metallic layer.
7. The method according to claim 1 , wherein the chip scale package is a Wafer-Level chip scale package.
8. The method according to claim 1 , wherein the frame is made from a non-metal substance.
9. The method according to claim 1 , wherein the inside top surface defined by the chamber is square.
10. The method according to claim 1 , wherein the inside top surface defined by the chamber is rectangular.
11. The method according to claim 1 , further comprising forming an opening in the frame at each chamber that will expose at least a portion of a back surface of a semiconductor die for the chip scale package.
12. The method according to claim 1 , wherein the peripherally surrounding side wall has a length extending beyond the front surface of the chip scale package.
13. A method, comprising:
attaching at least one chip scale package to an inside top surface of each chamber provided within a frame, said frame including a top member and a plurality of wall members, wherein the plurality of wall members define a plurality of chambers; and
cutting through the wall members of the frame to produce a plurality of chip scale package devices each having a surrounding wall formed from the wall members of the frame and a roof formed from the top member of the frame.
14. The method according to claim 13 , wherein cutting comprises dicing the frame through the walls and between the chambers into a plurality of metal cans, each metal can including at least one chamber containing at least one chip scale package, and each metal can having a peripherally surrounding side wall formed from the diced through walls of the frame.
15. The method according to claim 14 , wherein the peripherally surrounding side walls are spaced from an edge of the chip scale package by a distance.
16. The method according to claim 13 , further comprising forming an opening in the frame at each chamber that will expose at least a portion of a back surface of a semiconductor die for the attached chip scale package.