Patent ID: 11953522
Assignee: TECHNOPROBE S.P.A.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 19:
20. A probe head for a testing apparatus of electronic devices integrated on a semiconductor wafer comprising:
a first plurality of contact probes having a first transversal diameter;
a second plurality of micro contact probes having a second transversal diameter, smaller than the first transversal diameter of the contact probes of the first plurality, transversal diameter meaning a maximum extension of a cross section of the contact probes of the first plurality and of the micro contact probes of the second plurality, even non-circular in shape; and
a flexible membrane comprising suitable conductive tracks for electrically connecting a contact probe of the first plurality with a corresponding micro contact probe of the second plurality,
the contact probes of said first plurality being arranged between the testing apparatus and the flexible membrane, and
the micro contact probes of the second plurality being arranged between the flexible membrane and a semiconductor wafer,
the micro contact probes of the second plurality being configured to abut onto contact pads of a device under test integrated in the semiconductor wafer,
each contact probe of the first plurality being in electrical contact with a corresponding micro contact probe of the second plurality through a conductive track of the flexible membrane so to electrically connect the device under test with the testing apparatus;
wherein each contact probe of the first plurality comprises a rod-shaped body ending with a first end portion that is configured to electrically connect with the flexible membrane and with a second end portion configured to electrically connect with the testing apparatus; and
wherein the first end of each contact probe of the first plurality is fixedly attached to the flexible membrane and the second end of each contact probe of the first plurality is fixedly attached to the interface board.