Individual lead pull test for beam leaded devices
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsRichard M. Wootten, Jake Herron, Jr.
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Abstract
A method for destructive testing of the bond strength of each individual d of a chip beam-lead device which includes cutting the chip using a laser, laser cutting a hole through each individual piece of the chip with the lead attached to the chip and inserting a hook of a pull tester into the hole made in each chip section and pulling the chip section and the lead attached thereto to determine the bond strength between the lead of the chip and the conductor to which the lead is attached.
Claims3
A method for testing individual beam-leads of a chip-beam leaded device that has a multiplicity of beam-leads bonded to respective conductors that are mounted on a substrate, said method comprising cutting said chip beam-leaded device into sections so that a beam-lead remains on each section, then cutting a hole through each cut section at a position adjacent to said beam-lead, placing a hook of a gram pull tester through said hole in said cut section and pulling said gram pull tester until said beam-lead breaks or is separated from said conductor to determine the bond strength of said beam-lead relative to said conductor.
Dependencies are inferred from the claim text.