{"id":12292,"date":"2023-11-14T23:24:33","date_gmt":"2023-11-14T22:24:33","guid":{"rendered":"https:\/\/haecker-automation.de\/variation-of-laser-spot-size-for-correct-soldering-of-smd-components\/"},"modified":"2023-11-14T23:38:33","modified_gmt":"2023-11-14T22:38:33","slug":"variation-of-laser-spot-size-for-correct-soldering-of-smd-components","status":"publish","type":"post","link":"https:\/\/kurtz-ersa-smart-production.com\/en\/variation-of-laser-spot-size-for-correct-soldering-of-smd-components\/","title":{"rendered":"Variation of laser spot size for correct soldering of SMD components"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"12292\" class=\"elementor elementor-12292 elementor-12281\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-261b7fc8 e-flex e-con-boxed e-con e-parent\" data-id=\"261b7fc8\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6e627b55 elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"6e627b55\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Variation of laser spot size for correct soldering of SMD components<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-55cd55f e-flex e-con-boxed e-con e-parent\" data-id=\"55cd55f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-37819e0 e-con-full e-flex e-con e-child\" data-id=\"37819e0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e3c9758 elementor-widget elementor-widget-heading\" data-id=\"e3c9758\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Variation of laser spot size for correct soldering of SMD components\n\n\n\n\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e3992d1 elementor-widget elementor-widget-text-editor\" data-id=\"e3992d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tUsing a laser for the selective soldering of SMD components can be provide high quality electrical connection on PCBs additionally comprising temperature sensitive systems, e.g. CCDs. In order to achieve a high quality connection, the soldering pads of the SMD and the PCB and the solder paste itself has to be heated simultaniously and homogenious in time and temperature. Thus the spot of the laser, which is usally in the range of 10\u20134m \u2264 d \u2264 10\u20133m in diameter, has to be adjusted in size to match both, the component and pad size.\n\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ae28e0 elementor-widget elementor-widget-image\" data-id=\"6ae28e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1224\" height=\"767\" src=\"https:\/\/kurtz-ersa-smart-production.com\/wp-content\/uploads\/2023\/11\/laser-spot-size.png\" class=\"attachment-full size-full wp-image-12288\" alt=\"\" srcset=\"https:\/\/kurtz-ersa-smart-production.com\/wp-content\/uploads\/2023\/11\/laser-spot-size.png 1224w, https:\/\/kurtz-ersa-smart-production.com\/wp-content\/uploads\/2023\/11\/laser-spot-size-300x188.png 300w, https:\/\/kurtz-ersa-smart-production.com\/wp-content\/uploads\/2023\/11\/laser-spot-size-1024x642.png 1024w, https:\/\/kurtz-ersa-smart-production.com\/wp-content\/uploads\/2023\/11\/laser-spot-size-768x481.png 768w\" sizes=\"(max-width: 1224px) 100vw, 1224px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ddc7115 elementor-widget elementor-widget-text-editor\" data-id=\"ddc7115\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tFig. 1 Horizontal spot size d in x- and y-direction of the soldering laser in dependency of the z-position\n\nThe adjustment of the spot size of the soldering laser can be realized by defocussing. Therefore, a laser with a fixed focal lenght has to be move in vertical direction respectively to the reference plane of the PCB. This direction is mainly defined as the z-direction. Figure 1 shows an example of the size of the laser spot on the PCB. The diagram shows very clearly, that the spot size is not continious distribution and there are differences in x and y. Although the data also is sensitive to the used measurement system the values have to be determined in order to achieve high quality results of the soldered junction. Moreover, due to the usage of laser diodes the shape of the laser spot have an additional variation due to the optical properties of the diode.\n\nFor achieving high accuracy in the laser soldering process, it is necessary to measure the optical properties of the laser spot along the z-direction. This measurement has to be repeated for different laser powers as well due to the thermal and optical behavior of the laser diodes. The most simple measurements can be conducted using a plastic sheet and apply laser pulses in order to drill holes into it. These holes can be measured afterwards. The most precise but expensive procedure might be the usage of a special laser camera measurement equipment. These measurement system are able to perform direct high resolution measurements of the laser spot. Mainly, laser soldering heads in the micro assembling industry has been characterized using such a system before beeing delivered to the customer. The customer can determine the spot size from a calibration sheet provided from the manufactorer. This calibration sheet has to be refrehed after a certain working time due to the degeneration of the laser diode.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Variation of laser spot size for correct soldering of SMD components Using a laser for the selective soldering of SMD components can be provide high quality electrical connection on PCBs additionally comprising temperature sensitive systems, e.g. CCDs. In order to achieve a high quality connection, the soldering pads of the SMD and the PCB and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3313,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-12292","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dosieren-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Variation of laser spot size for correct soldering of SMD components | Kurtz Ersa Smart Production GmbH<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kurtz-ersa-smart-production.com\/en\/variation-of-laser-spot-size-for-correct-soldering-of-smd-components\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Variation of laser spot size for correct soldering of SMD components | Kurtz Ersa Smart Production GmbH\" \/>\n<meta property=\"og:description\" content=\"Variation of laser spot size for correct soldering of SMD components Using a laser for the selective soldering of SMD components can be provide high quality electrical connection on PCBs additionally comprising temperature sensitive systems, e.g. CCDs. 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