Method for making a socket to perform testing on integrated circuits
View Patent ↗A interconnect structure is inexpensively manufactured and easily insertable into a socket. The interconnect structure is manufactured by forming a sacrificial substrate with cavities that is covered by a masking material having openings corresponding to the cavities. A first plating process is performed by depositing conductive material, followed by coupling wires within the openings and performing another plating process by depositing more conductive material. The interconnect structure is completed by first removing the masking material and sacrificial substrate. Ends of the wires are coupled opposite now-formed contact structures to a board. To complete the socket, a support device is coupled to the board to hold a tested integrated circuit.
1. A system for exercising an integrated circuit comprising:
a socket including,
a board;
an interconnect structure manufactured to be inserted into said socket, said interconnect structure being coupled to said board, said interconnect structure including,
a substrate,
first and second pads coupled to said substrate and coupled to each other through vias running through said substrate, said second pads coupling said interconnect structure to said board, and
resilient contacts coupled to said first pads, each said resilient contact comprising:
an elongate, resilient body coupled at a first end to one of said first pads, and
a plurality of tips extending from a base coupled to a second end of said body, said plurality of tips spaced in sufficient proximity one to another such that each tip contacts a same one of a terminal of said integrated circuit; and
a support structure that secures contact between the integrated circuit and said resilient contacts during the testing.
2. A system according to claim 1 , wherein said interconnect structure is a modular interconnect structure that is inserted into said socket.
3. A system according to claim 1 , wherein said interconnect structure is a drop-in interconnect structure that is dropped into said socket.
4. A system according to claim 1 , wherein said interconnect structure is a plug-in interconnect structure that is plugged into said socket.
5. A system according to claim 1 , wherein said socket includes a plurality of said interconnect structures.
6. A method comprising:
providing resilient spring contact elements on a plurality of substrates, said spring contact elements on each of said substrates disposed in a pattern to correspond to a pattern of terminals on one of a plurality of semiconductor chips, wherein each said spring contact element comprises:
an elongate, resilient body coupled at a first end to one of said substrates;
a plurality of tips extending from a base coupled to a second end of said body, said plurality of tips spaced in sufficient proximity one to another such that each tip contacts a same one of a terminal of one of said chips; and
engaging a plurality of semiconductor chips, each provided in a package after being diced up from a wafer, so that terminals on each one of the chips contact the resilient spring contact elements on one of the substrates, there being a one-to-one correspondence between each of said chips and each of said substrates.
7. The system according to claim 1 , wherein each said body comprises a wire that is wire bonded at one end of said wire to one of said bases.
8. The system according to claim 7 , wherein each said wire is soldered at another end to one of said first pads.