Patent · US Active

Electronic device having cobalt coated aluminum contact pads

US10714439B2 · kind B2 · utility

0Cited by

2References

14Claims

0Family size

Assignee

TEXAS INSTRUMENTS INCORPORATED · US

Inventors

Nazila Dadvand · Montréal, CA
Helmut Rinck · Moosburg an der Isar, DE

Key dates

Filing date	Aug 21, 2018
Grant date	Jul 14, 2020
Priority date	—
Expiry date	Aug 21, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH01L2924/00011
WIPO fieldSemiconductors
WIPO sectorElectrical engineering

Abstract

A system and method for bonding an electrically conductive mechanical interconnector (e.g., a bonding wire, solder, etc.) to an electrical contact (e.g., contact pad, termination on a printed circuit board (PCB), etc.) made from an electrically conductive metal (e.g., aluminum) on an electronic device (e.g., integrated circuit (IC), die, wafer, PCB, etc.) is provided. The electrical contact is chemically coated with a metal (e.g., cobalt) that provides a protective barrier between the mechanical interconnector and the electrical contact. The protective barrier provides a diffusion barrier to inhibit galvanic corrosion (i.e. ion diffusion) between the mechanical interconnector and the electrical contact.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.