Method for making and testing thermocompression bonds

US6520026B1 · kind B1 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Lynda L. Anderson · Saugerties, US
• Gilles Granier · Vailhauquès, FR
• Robert E. Mahoney · Bradenton, US
• Bruce E. Moore · Poughkeepsie, US
• Kenneth Scea · Poughkeepsie, US
• Kent D. Waddell · Strokestown, IE

Key dates

• Filing date: Nov 3, 1999
• Grant date: Feb 18, 2003
• Expiry date: Nov 3, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2924/19041
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for making and testing the thermal compression bond between a wire and a contact or terminal lead of a connector wherein the wire and contact/terminal lead are positioned between opposing electrodes, and a direct current is passed through the electrodes, wire and contact/terminal lead to make a direct attach thermocompression bond. Sample bonds are subjected to a peel test to determine if the thermocompression bonds are within specification. The peel test includes securing the contact/terminal lead, bend the wire 90 degrees from the contact/terminal lead, and applying force to the wire at a constant rate of pull until thermocompression bond is broken and the wire is separated from the contact/terminal lead. The peel force required to break the bond is then compared to a standard to determine if the thermocompression bonds are within determined specifications. Additionally, an axial pull test may also be performed.