| 摘要 |
A tester for a testing a Hard Disk Drive (HDD) flex circuit prior to electrical installation of a Head Gimbal Assembly (HGA) includes a shorting block that makes electrical contact to the bondpads on the sample. The shorting block includes one or more electrical contacts that are electrically grounded and have a size and/or configuration to contact the bondpads as well as the surface of the sample around the bondpads to accommodate positioning tolerances of the sample under test, without need for optics, precise probes, or precision stages. The electrical contacts of the shorting block may be, e.g., a matrix of pogopins or a flexible electrically-conductive material. During testing, the bondpads are shorted together and to ground with the shorting block while it is determined whether Short failures are properly detected. While the shorting block is not engaged with the bondpads, it is determined whether open failures are properly detected. |
