Agere Systems Inc.

Agere Systems Guardian Corp.

Steven V Stang

Philip William Seitzer

James C Golden

Wayne Rademacher

Calvin Lee Schumacher

Gregory A King

Gregory P Micko

Brant R Gourley

Paul F Cisewski

Brian J Sandvold

Earl E Wentzel

A method of electrical testing devices such as integrated circuits that include conductive pads formed on the surface. A material having a desired bulk resistivity and viscosity is applied to either the device or the electrical probe prior to testing. The application of the material has been found to substantially reduce the need for cleaning of the probe.

Method of electrical testing of an integrated circuit with an electrical probe

Method of electrical testing

A printed wiring board provides connection between a chip and a standard footprint layout of a test machine. An insulating substrate defines a chip receiving region having a plurality of chip connector pads on one side of the substrate for connection to bump contacts of custom integrated circuit chips. A plurality of layout connectors are in a layout connection region of the board and arranged in the standard footprint layout. Circuit traces provide electrical connection between the chip connectors and the layout connectors, and a solder stop on the substrate extends over the circuit traces between the chip receiving region and the layout connection region. A plurality of plated apertures extend through the substrate in the chip receiving region to a thermally conductive heat sink opposite the chip connectors. In use, a chip is mounted to the board in the chip receiving region and connected to the chip connectors to rigidly mount the chip to the board. A thermally conductive paste extends through the apertures to thermally connect the chip to the heat sink. The solder stop prevents solder connecting the chip to the chip connectors from wicking along the traces thereby preventing deformation of the bump contacts.

Standardized test board for testing custom chips

Growing community of inventors

Inver Grove Heights, MN, United States of America

Steven V Stang