Micron Technology Incorporated

Jerry D McBride

Siang Tian Giam

Scott L Ayres

David R Brown

Scott N Gatzemeier

Chris Cooper

Brett Crump

John Caldwell

Christopher B Cooper

Phil Byrd

The invention includes probe interposers and methods of fabricating pose interposers. In one implementation, a method of fabricating a probe interposer includes providing a substrate having a frontside and a backside. Probe tips are lithographically patterned on the substrate frontside. The probe tips have electrically conductive outer ends configured to mechanically and electrically engage conductive contact surfaces of a circuit substrate to be probed. Mechanical hard stops are lithographically patterned on the substrate frontside. The mechanical hard stops have outer surfaces configured to mechanically engage some surface of the circuit substrate during probe of the circuit substrate with the probe interposer. The invention includes probe interposers independent of method of fabrication.

Probe interposers and methods of fabricating probe interposers

A system for testing a semiconductor device and storing device test results in nonvolatile memory elements on the tested device, in which the semiconductor device includes logic circuitry which allows test results to be determined on the device. Test results are stored temporarily in one or more latch elements on the semiconductor device and are subsequently stored in nonvolatile memory elements. The invention eliminates the need for device testing equipment to perform a determination of test results and thus may simplify the design of test equipment. In one embodiment of the invention, passing test results are stored in a mixed code of set and unset nonvolatile memory elements such that the test results contain information about correct application of test signals as well as correct functioning of the semiconductor device.

System for storing device test information on a semiconductor device using on-device logic for determination of test results

An apparatus and a method are disclosed for reducing the pin driver count required for testing computer memory devices, specifically Rambus DRAM, while a die is on a semiconductor wafer. By reducing the pin count, more DRAMs can be tested at the same time, thereby reducing test cost and time. One preferred embodiment utilizes a trailing edge of a precharge clock to select a new active bank address, so that the address line required to select a new active address does not have to be accessed at the same time as the row lines.

Apparatus and method for reducing test resources in testing DRAMs

Apparatus and method for reducing test resources in testing DRAMS

Apparatus and method for reducing test resources in testing Rambus DRAMs

A method and system for testing a semiconductor device and storing device test results in nonvolatile memory elements on the tested device, in which the semiconductor device includes logic circuitry which allows test results to be determined on the device. Test results are stored temporarily in one or more latch elements on the semiconductor device and are subsequently stored in nonvolatile memory elements. The invention eliminates the need for device testing equipment to perform a determination of test results and thus may simplify the design of test equipment. In one embodiment of the invention, passing test results are stored in a mixed code of set and unset nonvolatile memory elements such that the test results contain information about correct application of test signals as well as correct functioning of the semiconductor device.

Method and system for storing device test information on a semiconductor device using on-device logic for determination of test results

Apparatus and method for testing rambus DRAMs

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Biose, ID, United States of America

Jerry D McBride