Teradyne, Inc.

Dis Tech America, LLC

Brian Brecht

Frank Parrish

Heng-Kit Too

Keith J Breinlinger

Arash Behziz

Gerald H Johnson

Richard Pye

Arthur E LeColst

Derek Castellano

Donald Eric Thompson

Shih-Fan Chen

Kenneth L Degan

Max Zhang

Iris Weng

Xue-Bin Tan

Julie Robison

Rocky Tao

Roger A Plante

Alfred M Zakarian

Hale Deng

Steve Ledford

William Patti

Mark Garcia

An example system for maintaining the shape of a circuit board includes metal balls that are configured not to collapse in whole or part in response to a force below a predefined force and a temperature below a predefined temperature. The metal balls are configured to support a substrate and are part of electrical connections between the substrate and a circuit board. The system includes a fixture configured to apply force to the substrate while the substrate is subjected to the temperature. The fixture is configured to distribute the force across a surface of the substrate that is not in contact with the metal balls such that the force applied by the fixture and the support of the substrate by the metal balls maintains a shape of the substrate at the temperature.

Maintaining the shape of a circuit board

A probe card in an automated test equipment (ATE) and methods for operating the same for testing electronic devices. The probe card may be a portion of a vertical-type probe card assembly in which pads on a circuit board are contacted by probe pins. The probe card has a pad geometry that compensates for misalignment with corresponding probe pins due to manufacturing error or a mismatch of coefficient of thermal expansion, enabling reliable operation of the ATE over a wide range of test temperatures. The pad array may have a plurality of elongated pads, each of uniquely designed size, tilt angle, and/or center location, with the characteristics of each pad being dependent on a distance between each pad and a centroid of the pad array, such that a probe pin to pad location errors can be mitigated.

Probe card pad geometry in automated test equipment

A probe card in an automated test equipment (ATE) is disclosed. The probe card may be a portion of a vertical-type probe card assembly in which pads on a circuit board are contacted by probe pins, with vertical vias in the circuit board interconnecting various conductive elements. Disclosed herein is a transposed via arrangement within a circuit board for a probe card, where adjacent vias are offset towards each other such that the inductance between the adjacent vias may be reduced to provide a desirable impedance during high frequency signal and/or power transmission.

Transposed via arrangement in probe card for automated test equipment

An example apparatus includes a first printed circuit board (PCB) having a power layer, a ground layer, and a slot. The slot includes a first power electrical contact that is electrically connected to the power layer and a first ground electrical contact that is connected to the ground layer. The slot extends orthogonally or obliquely through multiple layers of the first PCB. A second PCB includes a second power electrical contact, a second ground electrical contact, and capacitors electrically connected between the second power electrical contact and the second ground electrical contact. The second PCB is configured for insertion into the slot to form an electrical connection between the first power electrical contact and the second power electrical contact and between the first ground electrical contact and the second ground electrical contact.

Connecting circuit boards

Probe pin arrangements in a vertical-type probe card assembly for an automated test equipment (ATE) are disclosed. In some embodiments, one or more additional conductive regions are provided in between adjacent probe pins. The additional conductive regions may reduce spacing between probe pins connected to adjacent probe card pads, and may in turn reduce or adjust inductance between the two probe cards pads to provide improved signal impedance matching or lower power impedance. In one embodiment, the additional conductive region is a short probe pin. In another embodiment, the additional conductive region is a protrusion on a vertical probe pin.

Probe card assembly in automated test equipment

A probe card in an automated test equipment (ATE) is disclosed. The probe card may be a portion of a vertical-type probe card assembly in which pads on a circuit board are contacted by probe pins, with vertical vias in the circuit board interconnecting various conductive elements. Disclosed herein is a probe card having ground vias in a coaxial arrangement around a signal via that provide electromagnetic shielding to a signal via to reduce crosstalk between adjacent signal vias.

Coaxial via arrangement in probe card for automated test equipment

The traditional device interface board is replaced by a number of smaller strips containing one or more electrical components for interfacing the device under test and the test head. The device interface modules may mount to a stiffening member having a back bone and multiple ribs running through the stiffening member. The device interface strips can create a lattice-like structure for the interface circuitry. Individual circuits may be disposed on the interface strips to perform functionality relating to the device under test and/or the test head.

Modularized device interface with grounding insert between two strips

In one embodiment a high power interface apparatus is provided having a multilayer laminated cable including force conductor planes having flush and recessed portions and return conductor planes having flush and recessed portions. The flush portions of the conductor planes extend to a contact end of the laminated cable and the recessed portions are removed from the contact end. The flush portions are aligned along axes at the contact end. The flush portions of the return conductor planes are aligned at the contact end along axes aligned within recessed portions of the force conductor planes. A dielectric material separates the force and return conductor planes. Surface contact pads may be provided on the contact end including force contact pads, each contacting and extending along aligned flush portions of the force conductor planes, and including return conductor pads, each contacting and extending along aligned flush portions of the return conductor planes. The contact pads may be formed by plating the end, and then scoring. The multilayer laminate cable can be formed with a rigid portion near the contact end and a flexible portion between the cable ends. In some embodiments the force and return conductor planes of the flexible portion extend to the ends of the cable while the rigid portion can be formed with additional force and return conductor planes. Through vias may be included at the rigid portion to electrically couple the force conductor planes together and to electrically coupling the return conductor planes together.

High power interface

Growing community of inventors

Newbury Park, CA, United States of America

Brian Brecht