{"id":4745,"date":"2016-07-27T09:31:07","date_gmt":"2016-07-27T07:31:07","guid":{"rendered":"https:\/\/www.xyztec.com\/?p=4745"},"modified":"2023-09-19T11:21:19","modified_gmt":"2023-09-19T11:21:19","slug":"how-to-wire-pul","status":"publish","type":"post","link":"https:\/\/www.xyztec.com\/zh-hant\/how-to-wire-pul\/","title":{"rendered":"How to: Wire Pull"},"content":{"rendered":"

We recently published How To: Wire Pull<\/a>, a guide advising what to consider and how to best perform a Wire Pull test. The main focus of the manual is on wire- and ribbon pull using wire hooks. Loop height measurement is also covered. The how-to briefly touches on surrounding topics like tweezer pull and peel testing of wires, which will be the subject of a separate future how-to by xyztec.<\/p>\n

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How to: Wire Pull Testing?<\/h2>\n

Wire Pull Testing applies an upward force under the wire, effectively pulling it away from the substrate or die. The purpose of the test is as MIL-STD-883 2011.9 describes it: “To measure bond strengths, evaluate bond strength distributions, or determine compliance with specified bond strength requirements”. A wire can be pulled to destruction, but there are also non-destructive variants whereby one tests whether the wire can withstand a certain force. Non-destructive test methods are typically used for 100% testing of safety critical, high quality and high cost products, avoiding damage to the acceptable wired bonds tested.<\/p>\n

\"wire-hook-concentricity-newsletter\"<\/p>\n

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What is wire pull?<\/h2>\n

The term Wire Pull usually refers to the act of pulling a wire with a hook mounted on a pull sensor on a bond tester. However, to promote certain failure modes, wires can be cut and then pulled by tweezers, also mounted on a pull sensor on a bond tester. Wire Pull is sometimes abbreviated to WP. Our wire pull test type page contains videos of both thin wire pull testing and thick wire pull testing.<\/p>\n

Usually wires up to 75\u00b5m diameter (3 mil) are classified as thin wire. Beyond that size, we speak about thick wire testing.<\/p>\n

\"alignment-along-wire\"<\/p>\n

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Index<\/h2>\n
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  1. Introduction<\/a><\/li>\n
  2. What is Wire Pull?<\/a><\/li>\n
  3. What kind of wires can be tested?<\/a><\/li>\n
  4. Objectives<\/a><\/li>\n
  5. Tool design<\/a><\/li>\n
  6. Tool quality<\/a>\n