{"id":22451,"date":"2014-12-19T09:08:41","date_gmt":"2014-12-19T08:08:41","guid":{"rendered":"https:\/\/www.xyztec.com\/?p=22451"},"modified":"2023-09-26T12:02:47","modified_gmt":"2023-09-26T12:02:47","slug":"copper-pillar-testing-2","status":"publish","type":"post","link":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/","title":{"rendered":"Copper pillar testing"},"content":{"rendered":"<h1>Copper pillar testing<\/h1>\n<ul>\n<li>Sensor accuracy \u00b10.075%<\/li>\n<li>Down to 35\u00b5m diameter copper pillars<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<h2>Introduction<\/h2>\n<p>Copper Pillar is rapidly being adopted as a bumped wafer interconnect. The construction is that of a Copper cylinder around 50\u00b5m in diameter and height, topped with a dome of solder.<\/p>\n<p>As with any interconnect the quality of the bonding process between the different parts is vital for the reliability of the finished product. The bond between the copper and its pad on the wafer are of particular interest as this is seen as the most likely failure mode. In a bond test a failure mode between the copper and wafer is then the \u201cFailure mode of interest\u201d.<\/p>\n<div class=\"picture left\"><img decoding=\"async\" class=\"alignnone size-full wp-image-16105\" src=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/Copper_Pillar_1.png\" alt=\"Copper Pillar\" width=\"203\" height=\"124\" \/><img decoding=\"async\" class=\"alignnone size-full wp-image-16077\" src=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/Copper_Pillar_friction_grip.png\" alt=\"Friction grip\" width=\"126\" height=\"126\" \/> <img decoding=\"async\" class=\"alignnone size-full wp-image-16070\" src=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/Reformed_solder_ball.png\" alt=\"Reformed_solder_ball\" width=\"142\" height=\"126\" \/><\/div>\n<div><\/div>\n<h2>Pull testing<\/h2>\n<p>This failure mode can be produced by either a pull or a shear test and the measured bond strength used for your process control. In many other applications pull testing is typically preferred because the bond is subjected to a simple tensile load, distributed over the bond area. The bond separation is clean making failure mode analysis of the surfaces relatively easy. Unlike solder bumps, Copper is relatively hard and gripping it therefore easier.<\/p>\n<div class=\"picture right\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-16049\" src=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/Copper_Pillar_pulltest_XYZTEC_Condor_Sigma-1-262x300.png\" alt=\"Copper_Pillar_pulltest_XYZTEC_Condor_Sigma\" width=\"262\" height=\"300\" \/><br \/>\nSolder balls require precise reforming in order to be able to apply a meaningful test load on to the bond. Copper also has to be reformed in order to be able to grip it but this takes the form of well know gripping methods such as plain surfaces and friction, a few serrations that slightly reform the copper in order to get a mechanical grip or a slight tapper.<\/div>\n<div class=\"picture left\"><\/div>\n<div><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-16056\" src=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/Copper_Pillar_failure_mode_P1-1.png\" alt=\"Copper_Pillar_failure_mode_P1\" width=\"147\" height=\"261\" \/><\/div>\n<h2>Shear testing<\/h2>\n<p>An alternative to pull testing is a shear test. If this is done with a very low shear height the bond is subjected to mostly shear. If a high shear height is used the bond is loaded by shear and a bending moment. It is though the bending loads, and in particular the tension side of the bending moment, that typically cause the bond to fail. The pillar tends to pivot on its edge furthest from the shear tool, making the failure mode very similar to that of a pull test.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-16042\" src=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/Copper_Pillar_low_shear.png\" alt=\"Copper_Pillar_low_shear\" width=\"266\" height=\"106\" \/><\/p>\n<p>The advantages of a high shear test are that the tool and test are much simpler. Making pull tweezers with 50\u00b5m cavities is difficult and costly. Aligning them to the pillar takes time and requires skill. A shear test is no different to that commonly used when testing wire bonds. The only difference being the shear height is bigger. The tools cost a lot less and its alignment to the pillar is not so critical, making it less skilled and faster.<\/p>\n<div class=\"picture left\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-16035\" src=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/Copper_Pillar_high_shear.png\" alt=\"Copper_Pillar_high_shear\" width=\"266\" height=\"121\" \/><\/div>\n<p>Variations in shear height will cause variations in the test result but with the <a href=\"https:\/\/www.xyztec.com\/products\/sigma\/\">Sigma<\/a>\u00a0accuracy of \u00b11\u00b5m these affects are likely to be less than those caused by the grip reforming and operator misalignment in a pull test. It is though beneficial to test with the highest possible shear height as this reduces any effect from the small variations in height and assures that the bending moment dominates the failure mode.<\/p>\n<div class=\"picture right\">\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-16021\" src=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/Copper_Pillar_failure_mode_S1.png\" alt=\"Copper Pillar failure mode S1\" width=\"173\" height=\"270\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-16028\" src=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/Copper_Pillar_sheartest-250x300.png\" alt=\"Copper_Pillar_sheartest\" width=\"250\" height=\"300\" \/><\/p>\n<\/div>\n<p>For a solder ball a\u00a0<a href=\"https:\/\/www.xyztec.com\/knowledgecenter\/pull-tests\/cold-bump-pull-cbp\/\">Cold Bump Pull test<\/a>\u00a0is known to be better than shear. A 1st bond Gold ball test is best done with a low shear height. The reason for both of these comes from our \u201c<a href=\"https:\/\/www.xyztec.com\/about\/seminars\/\">Golden rules of bond testing<\/a>\u201d \u00a9, they both produce the highest number of failure modes of interest or the highest possible test force.<\/p>\n<p>In the case of Copper pillars we should be guided by these same rules. Shear is the simplest test and it does produce the failure mode of interest. The optimum shear height will be the one that maximizes this or produces the highest test force.<\/p>\n<p>&nbsp;<\/p>\n<h2>Choose between pull and shear testing<\/h2>\n<p>The choice between pull or shear testing depends on the application and the test objectives. If you are interested to find out more please\u00a0<a href=\"https:\/\/www.xyztec.com\/about\/contact\/\">contact us<\/a>\u00a0for more information, to request a demonstration or a quotation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Copper pillar testing Sensor accuracy \u00b10.075% Down to 35\u00b5m diameter copper pillars<\/p>\n","protected":false},"author":18,"featured_media":18352,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2969],"tags":[3291,3290,3606,3607,3245],"class_list":["post-22451","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-newsletters","tag-copper-pillar-pull","tag-copper-pillar-shear","tag-copper-pillar-testing","tag-pull-testing","tag-shear-testing"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Read the newsletter about copper pillar testing<\/title>\n<meta name=\"description\" content=\"The construction is that of a Copper cylinder around 50\u00b5m in diameter and height, topped with a dome of solder.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Read the newsletter about copper pillar testing\" \/>\n<meta property=\"og:description\" content=\"The construction is that of a Copper cylinder around 50\u00b5m in diameter and height, topped with a dome of solder.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Xyztec\" \/>\n<meta property=\"article:published_time\" content=\"2014-12-19T08:08:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-26T12:02:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.xyztec.com\/wp-content\/uploads\/2020\/08\/Coppar-pillar-pull.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Mari\u00eblle van Bussel\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mari\u00eblle van Bussel\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"5\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/\"},\"author\":{\"name\":\"Mari\u00eblle van Bussel\",\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/#\\\/schema\\\/person\\\/b33bdfc306423e71fd2aaf18031f8015\"},\"headline\":\"Copper pillar testing\",\"datePublished\":\"2014-12-19T08:08:41+00:00\",\"dateModified\":\"2023-09-26T12:02:47+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/\"},\"wordCount\":653,\"image\":{\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.xyztec.com\\\/wp-content\\\/uploads\\\/2020\\\/08\\\/Coppar-pillar-pull.jpg\",\"keywords\":[\"Copper pillar pull\",\"Copper pillar shear\",\"Copper pillar testing\",\"Pull testing\",\"Shear testing\"],\"articleSection\":[\"Newsletters\"],\"inLanguage\":\"de\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/\",\"url\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/\",\"name\":\"Read the newsletter about copper pillar testing\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.xyztec.com\\\/wp-content\\\/uploads\\\/2020\\\/08\\\/Coppar-pillar-pull.jpg\",\"datePublished\":\"2014-12-19T08:08:41+00:00\",\"dateModified\":\"2023-09-26T12:02:47+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/#\\\/schema\\\/person\\\/b33bdfc306423e71fd2aaf18031f8015\"},\"description\":\"The construction is that of a Copper cylinder around 50\u00b5m in diameter and height, topped with a dome of solder.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.xyztec.com\\\/wp-content\\\/uploads\\\/2020\\\/08\\\/Coppar-pillar-pull.jpg\",\"contentUrl\":\"https:\\\/\\\/www.xyztec.com\\\/wp-content\\\/uploads\\\/2020\\\/08\\\/Coppar-pillar-pull.jpg\",\"width\":600,\"height\":400,\"caption\":\"Coppar pillar pull\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/copper-pillar-testing-2\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Copper pillar testing\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/#website\",\"url\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/\",\"name\":\"Xyztec\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/#\\\/schema\\\/person\\\/b33bdfc306423e71fd2aaf18031f8015\",\"name\":\"Mari\u00eblle van Bussel\",\"url\":\"https:\\\/\\\/www.xyztec.com\\\/de\\\/author\\\/marielle-van-bussel\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Read the newsletter about copper pillar testing","description":"The construction is that of a Copper cylinder around 50\u00b5m in diameter and height, topped with a dome of solder.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/","og_locale":"de_DE","og_type":"article","og_title":"Read the newsletter about copper pillar testing","og_description":"The construction is that of a Copper cylinder around 50\u00b5m in diameter and height, topped with a dome of solder.","og_url":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/","og_site_name":"Xyztec","article_published_time":"2014-12-19T08:08:41+00:00","article_modified_time":"2023-09-26T12:02:47+00:00","og_image":[{"width":600,"height":400,"url":"https:\/\/www.xyztec.com\/wp-content\/uploads\/2020\/08\/Coppar-pillar-pull.jpg","type":"image\/jpeg"}],"author":"Mari\u00eblle van Bussel","twitter_card":"summary_large_image","twitter_misc":{"Verfasst von":"Mari\u00eblle van Bussel","Gesch\u00e4tzte Lesezeit":"5\u00a0Minuten"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/#article","isPartOf":{"@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/"},"author":{"name":"Mari\u00eblle van Bussel","@id":"https:\/\/www.xyztec.com\/de\/#\/schema\/person\/b33bdfc306423e71fd2aaf18031f8015"},"headline":"Copper pillar testing","datePublished":"2014-12-19T08:08:41+00:00","dateModified":"2023-09-26T12:02:47+00:00","mainEntityOfPage":{"@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/"},"wordCount":653,"image":{"@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/#primaryimage"},"thumbnailUrl":"https:\/\/www.xyztec.com\/wp-content\/uploads\/2020\/08\/Coppar-pillar-pull.jpg","keywords":["Copper pillar pull","Copper pillar shear","Copper pillar testing","Pull testing","Shear testing"],"articleSection":["Newsletters"],"inLanguage":"de"},{"@type":"WebPage","@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/","url":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/","name":"Read the newsletter about copper pillar testing","isPartOf":{"@id":"https:\/\/www.xyztec.com\/de\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/#primaryimage"},"image":{"@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/#primaryimage"},"thumbnailUrl":"https:\/\/www.xyztec.com\/wp-content\/uploads\/2020\/08\/Coppar-pillar-pull.jpg","datePublished":"2014-12-19T08:08:41+00:00","dateModified":"2023-09-26T12:02:47+00:00","author":{"@id":"https:\/\/www.xyztec.com\/de\/#\/schema\/person\/b33bdfc306423e71fd2aaf18031f8015"},"description":"The construction is that of a Copper cylinder around 50\u00b5m in diameter and height, topped with a dome of solder.","breadcrumb":{"@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/#breadcrumb"},"inLanguage":"de","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/"]}]},{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/#primaryimage","url":"https:\/\/www.xyztec.com\/wp-content\/uploads\/2020\/08\/Coppar-pillar-pull.jpg","contentUrl":"https:\/\/www.xyztec.com\/wp-content\/uploads\/2020\/08\/Coppar-pillar-pull.jpg","width":600,"height":400,"caption":"Coppar pillar pull"},{"@type":"BreadcrumbList","@id":"https:\/\/www.xyztec.com\/de\/copper-pillar-testing-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.xyztec.com\/de\/"},{"@type":"ListItem","position":2,"name":"Copper pillar testing"}]},{"@type":"WebSite","@id":"https:\/\/www.xyztec.com\/de\/#website","url":"https:\/\/www.xyztec.com\/de\/","name":"Xyztec","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.xyztec.com\/de\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"de"},{"@type":"Person","@id":"https:\/\/www.xyztec.com\/de\/#\/schema\/person\/b33bdfc306423e71fd2aaf18031f8015","name":"Mari\u00eblle van Bussel","url":"https:\/\/www.xyztec.com\/de\/author\/marielle-van-bussel\/"}]}},"_links":{"self":[{"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/posts\/22451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/comments?post=22451"}],"version-history":[{"count":1,"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/posts\/22451\/revisions"}],"predecessor-version":[{"id":69802,"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/posts\/22451\/revisions\/69802"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/media\/18352"}],"wp:attachment":[{"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/media?parent=22451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/categories?post=22451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xyztec.com\/de\/wp-json\/wp\/v2\/tags?post=22451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}