The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 1995
Filed:
Feb. 22, 1994
Ronald J Jensen, Bloomington, MN (US);
Michael A Mitchell, Minnesota, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
Bare die test device for making temporary electrical connections between bonding pads on the die and external test connectors includes a die chuck, a fanout substrate, and a substrate chuck. The fanout substrate has conductive bumps spaced for registration with die bonding pads. A die chuck receives the die and a substrate chuck holds the fanout substrate. In a fixed alignment embodiment, an alignment arrangement between the die chuck and the substrate chuck provides registration. In an alternative embodiment, the fanout substrate has a backside etched cavity exposing a transparent compliant material. A lower frame provides for lateral and angular positioning of the die chuck relative to the substrate chuck to bring the conductive bumps into alignment with the bonding pads, while visually observing the alignment through the transparent material.