System for testing a group of IC-chips having a chip holding subassembly that is built-in and loaded/unloaded automatically
View Patent ↗An electromechanical system for testing IC-chips includes a chip holding subassembly which has sockets for holding a group of IC-modules that include the IC-chips; a moving mechanism for automatically moving the chip holding subassembly from a load position in the system to a test position in the system, and visa-versa; a temperature control mechanism which contacts the IC-modules on the chip holding subassembly only when that subassembly is at the test position; and a chip handler mechanism for automatically moving the IC-modules into and out of the sockets, when the chip holding subassembly is at the load position. At the test position, the temperature control mechanism contacts the IC-modules to control their temperature. At the load position, the chip handler mechanism automatically unloads one group of IC-modules from the sockets on the chip holding subassembly and automatically loads another group of the IC-modules into the sockets.
1. An electromechanical system for testing IC-chips; said system being comprised of:
a chip holding subassembly which has sockets for holding a group of IC-modules that includes said IC-chips;
a moving means for automatically moving said chip holding subassembly from a load position in said system to a test position in said system, and visa-versa;
a power supply means which sends electrical power to said IC-modules on said chip holding subassembly only when that subassembly is at said test position;
a temperature control means which contacts said IC-modules on said chip holding subassembly only when that subassembly is at said test position; and,
a chip handler means, for automatically moving said IC-modules into and out of said sockets, while said chip holding subassembly is at said load position.
2. A system according to claim 1 wherein said power supply means is rigidly attached to said chip holding subassembly and moves with that subassembly from said load position to said test position.
3. A system according to claim 1 wherein said moving means moves said chip holding subassembly horizontally from said load position to said test position, and said temperature control means moves vertically to contact said IC-modules on said chip holding subassembly at said test position.
4. A system according to claim 1 wherein said chip-handler means includes a robotic arm means for moving said IC-modules from one source container into said sockets, and from said sockets to at least one pass container and at least one fail container.
5. A system according to claim 4 which further includes a means for automatically replacing any one of said containers when said robotic arm has emptied or filled that container with said IC-modules.
6. A system according to claim 4 wherein each socket on said chip holding subassembly faces downward at said load and test position, and receives an IC-module that has electrical terminals which face upward.
7. A system according to claim 6 wherein said robotic arm means flips each IC-module 180° from an initial position where said electrical terminals face downward.
8. A system according to claim 4 wherein each source container, each pass container, and each fail container is a JEDIC tray.
9. A system according to claim 1 which further includes a signal generator means for sending test signals to all IC-modules which are held by said chip holding subassembly at said test position.
10. A system according to claim 9 wherein said signal generator means includes a digital state machine which is rigidly attached to said chip holding subassembly and moves with that subassembly from said load position to said test position, and a master controller which is stationary and is coupled via a communication channel to said digital state machine.
11. A system according to claim 9 wherein said signal generator means sends test signals which place said IC-chips on said chip holding subassembly in a predetermined state but do not functionally test said IC-chips.
12. A system according to claim 9 wherein said signal generator means sends test signals which functionally test said IC-chips on said chip holding subassembly.