Chip packaging with metal frame pin grid array
View Patent ↗A packaging technology for silicon chips is similar to ball grid array packaging technology of the prior art without, however, the use of printed board substrate of the prior art Instead pins are used that are part of a planar frame, the pins folded to a position 90 degrees from the plane of the frame, after which the frame is disposed in contact with the chip, pads on the frame and the chip are connected, and then entire assembly is then encapsulated. The edges of the frame are then cut off, leaving the encapsulation to maintain the configuration of the package in place.
1. A method for manufacturing a pin grid array for electronic chip packaging, comprising the steps of:
(a) creating a frame comprising a multiplicity of flattened wires integrally formed therewith, each having a longitudinal axis, and a multiplicity of corresponding electrically conducting frame pads, each flattened wire electrically connecting to a corresponding flattened pin and to a corresponding frame pad, and all disposed within the same plane;
(b) rotating each of the flattened wire approximately 90 degrees about its longitudinal axis so that it remains substantially within the plane of the frame, so that each pin is disposed at an angle normal to the plane of the frame;
(c) disposing the frame in proximity to a chip comprising chip pads, aligning the chip pads with the corresponding frame pads;
(d) electrically connecting each chip pad to the corresponding frame pad; and
(e) encapsulating the frame and chip with the pins extending through the encapsulation, so that the pins may be electrically connected to another electronic or electrical assembly.
2. The method of claim 1 , wherein the frame further comprises a periphery, said periphery comprising sides and ends, wherein each flattened wire is attached to one of the ends, the method further comprising the step of removing the frame ends where they attach to the flattened wires, after encapsulation.
3. The method of claim 2 , wherein the electrically connecting each chip pad to the corresponding frame pad further comprises wire bonding.
4. The method of claim 2 , wherein the electrically connecting each chip pad to the corresponding frame pad further comprises direct connection.
5. The method of claim 2 , wherein the method further comprises forming the frame from a single flat piece of metal by means comprising etching.
6. The method of claim 2 , wherein the method further comprises forming the frame from a single flat piece of metal by laser cutting.
7. The method of claim 2 , wherein the method further comprises forming the frame from a single flat piece of metal by stamping.
8. The method of claim 3 , wherein the method further comprises forming the frame from a single flat piece of metal by means comprising etching.
9. The method of claim 3 , wherein the method further comprises forming the frame from a single flat piece of metal by laser cutting.
10. The method of claim 3 , wherein the method further comprises forming the frame from a single flat piece of metal by stamping.
11. The method of claim 4 , wherein the method further comprises forming the frame from a single flat piece of metal by means comprising etching.
12. The method of claim 4 , wherein the method further comprises forming the frame from a single flat piece of metal by laser cutting.
13. The method of claim 4 , wherein the method further comprises forming the frame from a single flat piece of metal by stamping.
14. The method of claim 1 , further comprising testing the encapsulated frame and chip by means comprising attaching a testing device to the wires exposed after removal of the perimeter of the frame.