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. 09, 2025
Filed:
May. 09, 2022
Sandisk Technologies Llc, Addison, TX (US);
Linghan Chen, Yokkaichi, JP;
Lin Hou, Leuven, BE;
Sandisk Technologies, Inc., Milpitas, CA (US);
Abstract
Bonding strength and yield can be enhanced by providing a mating pair of a convex bonding surface and a concave bonding surface. The convex bonding surface can be provided by employing a conductive barrier layer having a higher electrochemical potential than copper. The concave bonding surface can be provided by employing a conductive barrier layer having a lower electrochemical potential than copper. Alternatively additionally, a copper material portion in a bonding pad may include at least 10% volume fraction of (200) copper grains to provide high volume expansion toward a mating copper material portion. The mating copper material portion may be formed with at least 95% volume fraction of (111) copper grains to provide high surface diffusivity, or may be formed with at least 10% volume fraction of (200) copper grains to provide high volume expansion.