Abstract:
A probe cleaning apparatus for cleaning a probe tip use to test semiconductors dies having an abrasive substrate layer an a tacky gel layer on top of the abrasive surface of the abrasive substrate layer. The probe tip is cleaned by passing it through the tacky gel layer so that it comes in contact with the abrasive surface of the abrasive substrate, moving the probe tip across the abrasive surface of the substrate layer, and then removing the probe tip from the successive layers of the cleaning apparatus. The probe tip emerges from the cleaning apparatus free from debris associated with testing the semiconductor dies.
Abstract:
A probe card (321) is provided for contacting an electronic component with raised contact elements. In particular, the present invention is useful for contacting a semiconductor wafer (310) with resilient contact elements (301), such as springs. A probe card (321) is designed to have terminals to mate with the contact elements on the wafer (310). In a preferred embodiment, the terminals are posts. In a preferred embodiment the terminals include a contact material suitable for repeated contacts. In one particularly preferred embodiment, a space transformer (324) is prepared with contact posts on one side and terminals on the opposing side. An interposer (325) with spring contacts (333, 334) connects a contact (335) on the opposing side of the space transformer (324) to a corresponding terminal (332) on a probe card (321), which terminal (332) is in turn connected to a terminal (331) which is connectable to a test device such as a conventional tester.
Abstract:
A planarizer for a probe card assembly. A planarizer includes a first control member extending from a substrate in a probe card assembly. The first control member extends through at least one substrate in the probe card assembly and is accessible from an exposed side of an exterior substrate in the probe card assembly. Actuating the first control member causes a deflection of the substrate connected to the first control member.
Abstract:
In an integrated circuit assembly, know good die (KGD) are assembled on a substrate. Interconnect elements electrically connect pads on a die attached to the substrate to traces or other electrical conductors on the substrate or to pads on another die attached to the substrate. The substrate may have one or more openings, exposing pads of the die. The assembly may comprise one or more dice.
Abstract:
The present invention discloses a method and system compensating for thermally induced motion of probe cards used in testing die on a wafer. A probe card incorporating temperature control devices to maintain a uniform temperature throughout the thickness of the probe card is disclosed. A probe card incorporating bi-material stiffening elements or shaped memory allows wich response to changes in temperature in such a way as to counteract thermally induced motion of the probe card is disclosed including rolling elements, slots and lubrication. Various means for allowing radial expansion of a probe card to prevent thermally induced motion of the probe card are also disclosed. A method for detecting thermally induced movement of the probe card and moving the wafer to compensate is also disclosed.
Abstract:
A method of designing and manufacturing a probe card assembly includes prefabricating one or more elements of the probe card assembly to one or more predefined designs. Thereafter, design data regarding a newly designed semiconductor device is received along with data describing the tester and testing algorithms to be used to test the semiconductor device. Using the received data, one or more of the prefabricated elements is selected. Again using the received data, one or more of the selected prefabricated elements is customized. The probe card assembly is then built using the selected and customized elements.
Abstract:
An interconnection element of a spring (body), and a method for fabricating the interconnection element. The interconnection element is of a size suitable for directly contacting a semiconductor or a packaged semiconductor device such as in an LGA package. The method includes fabricating a multi-tiered structure to form a compact, resilient interconnect structure. Fabricating each tier or leaf includes providing a base substrate material, and applying a masking material over the base substrate material. An opening is patterned in the masking material and a resilient element is formed in the opening. A large substrate with a plurality of such interconnection elements can be used as a wafer-level contactor. The method includes repeating this process one or more times to fabricate a chip-level interconnection element.
Abstract:
A probe card (321) is provided for contacting an electronic component with raised contact elements. In particular, the present invention is useful for contacting a semiconductor wafer (310) with resilient contact elements (301), such as springs. A probe card (321) is designed to have terminals to mate with the contact elements on the wafer (310). In a preferred embodiment, the terminals are posts. In a preferred embodiment the terminals include a contact material suitable for repeated contacts. In one particularly preferred embodiment, a space transformer (324) is prepared with contact posts on one side and terminals on the opposing side. An interposer (325) with spring contacts (333, 334) connects a contact (335) on the opposing side of the space transformer (324) to a corresponding terminal (332) on a probe card (321), which terminal (332) is in turn connected to a terminal (331) which is connectable to a test device such as a conventional tester.
Abstract:
The probe card assembly (500) includes a probe card (502), and a space transformer (506) having resilient contact structures (524) mounted to and extending from terminals (522) on its surface. An interposer (504) is disposed between the space transformer and the probe card. The space transformer and interposer are stacked on the probe card and the resilient contact structures can be arranged to optimise probing of entire wafer.