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:
Feb. 22, 2005
Filed:
Dec. 07, 2000
Thomas George Ference, Essex Junction, VT (US);
Wayne John Howell, Williston, VT (US);
Thomas George Ference, Essex Junction, VT (US);
Wayne John Howell, Williston, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A multi-chip stack structure and method of fabrication are provided utilizing self-aligning electrical contact arrays. Two or more arrays of interconnection contacts are provided, with one array being a rough aligned contact array, and a second array being a high bandwidth contact array. The rough aligned contact array has larger contacts and at least a portion thereof which melts at a substantially lower temperature than the melting temperature of the contacts of the high bandwidth contact array. By positioning two integrated circuit chips in opposing relation with the arrays mechanically aligned therebetween, and applying heat to melt the contacts of the rough aligned array, the two chips will rotate to align the respective contacts of the high bandwidth contact arrays, thereby achieving improved connection reliability between the structures.