Browse Prior Art Database

Tensile Tester

IP.com Disclosure Number: IPCOM000090542D
Original Publication Date: 1969-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Mele, JJ: AUTHOR [+2]

Abstract

This tester provides a fast and accurate measurement of the mechanical adhesion of a flip-chip to a metal land on a substrate. A module comprising substrate 10 includes pins 12 and opening 14. Flip-chip 16 is attached to substrate 10 by solder reflow joints 17. The mechanical strength of the joints are measured by placing substrate 10 in jig 18 with pins 12 in an upward direction. Substrate 10 is held in a fixed position by clamps 19. Tester 20, comprising transducer 22 and push rod 24, provides an analog indication of the joint strength. Push rod 24 is passed through opening 14 and into contact with chip 16. When sufficient pressure is applied to chip 16, one or more of joints 17 shears. The pressure is translated into electrical energy which operates a meter, not shown, to provide a reading of the joint strength.

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Tensile Tester

This tester provides a fast and accurate measurement of the mechanical adhesion of a flip-chip to a metal land on a substrate. A module comprising substrate 10 includes pins 12 and opening 14. Flip-chip 16 is attached to substrate 10 by solder reflow joints 17. The mechanical strength of the joints are measured by placing substrate 10 in jig 18 with pins 12 in an upward direction. Substrate 10 is held in a fixed position by clamps 19. Tester 20, comprising transducer 22 and push rod 24, provides an analog indication of the joint strength. Push rod 24 is passed through opening 14 and into contact with chip
16. When sufficient pressure is applied to chip 16, one or more of joints 17 shears. The pressure is translated into electrical energy which operates a meter, not shown, to provide a reading of the joint strength. Care is exercised to make sure that push rod 24 is perpendicular to the face of chip 16. Otherwise inaccurate measurements of tensile force result. Tester 20 can also be used to measure the adhesion of metal crossovers on substrates.

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