{"id":18134,"date":"2024-08-05T23:44:36","date_gmt":"2024-08-06T06:44:36","guid":{"rendered":"http:\/\/www.autodesk.com\/products\/eagle\/blog\/?p=2337"},"modified":"2025-08-07T07:31:12","modified_gmt":"2025-08-07T14:31:12","slug":"schottky-diodes","status":"publish","type":"post","link":"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/schottky-diodes\/","title":{"rendered":"How Schottky Diodes Work"},"content":{"rendered":"\n<p><em><span style=\"font-weight: 400;\">Here&#8217;s everything You Need to Know About Schottky Diodes<\/span>. Learn how Schottky diodes work in RF circuits, generators, and motor drivers with their low forward voltage drops and fast switching speeds.<\/em><\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"what-is-a-schottky-diode\">What is a Schottky diode?<\/h2>\n\n\n<p>A Schottky diode is a semiconductor diode formed by a metal-to-semiconductor junction instead of the usual p-n junction. It features a low forward voltage drop (usually 0.15 to 0.45 volts) and very fast switching speed, making it ideal for high-frequency and low-voltage applications. It\u2019s also known as a Schottky barrier or hot-carrier diode.<\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Like other diodes, the Schottky diode controls the direction of current flow in a circuit. These devices act like one-way streets in the world of electronics, letting current pass only from anode to cathode. However, unlike standard diodes, the Schottky diode is known for its low forward voltage and fast switching ability. This makes them an ideal choice for radio frequency applications and any device with low voltage requirements. <\/span><\/p>\n\n\n\n<?php\nfunction autodesk_fusion_cta_horizontal() {\n    ob_start();\n    ?>\n    <style>\n        .cta-section-horizontal {\n            background: #ddd; \/* Much lighter grey background *\/\n            padding: 12px; \/* Adjusted padding *\/\n            border-radius: 8px;\n            box-shadow: 0 3px 5px rgba(0, 0, 0, 0.2);\n            color: #333; \/* Darker text color for better readability *\/\n            display: flex;\n            align-items: center;\n            justify-content: space-between;\n            max-width: 650px; \/* Width adjusted for a more compact look *\/\n            margin: 20px auto;\n            position: relative;\n            flex-wrap: nowrap; \/* Prevent wrapping *\/\n        }\n\n        .cta-section-horizontal img {\n            width: 60px; \/* Slightly larger logo *\/\n            height: auto; \/* Maintain aspect ratio *\/\n            margin-right: 12px; \/* Adjusted spacing *\/\n            background-color: #ddd; \/* Match the background color *\/\n            padding: 6px; \/* Adjusted padding *\/\n            border-radius: 8px; \/* Slightly rounding to match container *\/\n            box-shadow: 0 0 0 4px #ddd; \/* Blend with background *\/\n        }\n\n        .cta-text {\n            flex: 1;\n            margin-right: 12px; \/* Adjusted spacing *\/\n        }\n\n        .cta-title {\n            font-size: 18px; \/* Slightly larger title font size *\/\n            font-weight: bold; \/* Bold title *\/\n            color: #f9a825; \/* Orange color *\/\n            margin-bottom: 4px; \/* Reduced margin *\/\n        }\n\n        .cta-info {\n            display: none; \/* Hide description *\/\n        }\n\n        .cta-buttons {\n            display: flex;\n            gap: 8px; \/* Adjusted button spacing *\/\n            align-items: center;\n        }\n\n        .cta-button {\n            padding: 8px 12px; \/* Button padding *\/\n            font-size: 12px; \/* Smaller font size for buttons *\/\n            font-weight: bold;\n            text-transform: uppercase;\n            border-radius: 4px; \/* Slightly rounded corners *\/\n            border: 2px solid transparent;\n            cursor: pointer;\n            transition: all 0.3s ease;\n            display: inline-flex; \/* Use inline-flex to ensure proper alignment *\/\n            align-items: center; \/* Center align text vertically *\/\n            justify-content: center; \/* Center align text horizontally *\/\n            text-decoration: none !important; \/* Ensure no underlines with !important *\/\n            color: inherit; \/* Use the button's text color *\/\n        }\n\n        .cta-button.white-button {\n            background-color: #fff;\n            color: #333;\n            border: 2px solid #ddd;\n        }\n\n        .cta-button.white-button:hover {\n            background-color: #333;\n            color: #fff;\n            border: 2px solid #f9a825;\n        }\n\n        .cta-button.black-button {\n            background-color: #f9a825;\n            color: #fff;\n            border: 2px solid #f9a825;\n        }\n\n        .cta-button.black-button:hover {\n            background-color: #fff;\n            color: #f9a825;\n            border: 2px solid #fff;\n        }\n    <\/style>\n\n    <div class=\"cta-section-horizontal\">\n        <img decoding=\"async\" src=\"https:\/\/autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2024\/09\/autodesk-fusion-product-icon-400.png\" alt=\"Autodesk Fusion Logo\">\n        <div class=\"cta-text\">\n            <h1 class=\"cta-title\">Elevate your design and manufacturing processes with Autodesk Fusion<\/h1>\n        <\/div>\n        <div class=\"cta-buttons\">\n            <a href=\"https:\/\/www.autodesk.com\/products\/fusion-360\/trial-intake-flow\" class=\"cta-button white-button\">Get a 30-Day Free Trial<\/a>\n            <a href=\"https:\/\/www.autodesk.com\/products\/fusion-360\/extensions\" class=\"cta-button black-button\">See Plans and Pricing<\/a>\n        <\/div>\n    <\/div>\n\n    <?php\n    return ob_get_clean();\n}\nadd_shortcode('autodesk_fusion_cta_horizontal', 'autodesk_fusion_cta_horizontal');\n?>\n\n\n<h2 class=\"wp-block-heading\" id=\"uses-for-the-schottky-diode\">Uses for the Schottky diode<\/h2>\n\n\n<p><span style=\"font-weight: 400;\">There are a variety of uses for the Schottky diode, including:<\/span><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><b>Power Rectification<span style=\"font-weight: 400;\">: Schottky diodes can be used in high-power applications thanks to their low forward voltage drop. These diodes will waste less power and might reduce the size of your heatsink. <\/span><\/b><\/li>\n\n\n\n<li><strong>Multiple Power Supplies<\/strong>: <span style=\"font-weight: 400;\">Schottky diodes can also help to keep power separated in a dual-power supply setup, like with a mains supply and battery. <\/span><\/li>\n\n\n\n<li><strong>Solar Cells<\/strong>: <span style=\"font-weight: 400;\">Schottky diodes can help to maximize solar cell efficiency with their low forward voltage drop. They also help protect the cell from reverse charges. &nbsp;<\/span><\/li>\n\n\n\n<li><strong>Clamping<\/strong>: <span style=\"font-weight: 400;\">Schottky diodes can also be used as a clamp within a transistor circuit, such as in the 74LS or 74S logic circuits. <\/span><\/li>\n<\/ol>\n\n\n<h2 class=\"wp-block-heading\" id=\"advantages-of-schottky-diodes\"><span style=\"font-weight: 400;\">Advantages of Schottky diodes<\/span><\/h2>\n\n\n<p><span style=\"font-weight: 400;\">One of the primary advantages of using a Schottky diode over a regular diode is its low forward voltage drop. This allows a Schottky diode to consume less voltage than a standard diode, using only 0.3-0.4V across its junctions. In the graph below, you can see that a forward voltage drop of about 0.3V begins to increase current significantly in a Schottky diode. This current increase would not take effect until about 0.6V for a standard diode. <\/span><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"453\" height=\"536\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/Schottky-diode-forward-voltage-vs-current-chart.jpg\" alt=\"Schottky Diode forward voltage and current\" class=\"wp-image-43308\" srcset=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/Schottky-diode-forward-voltage-vs-current-chart.jpg 453w, https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/Schottky-diode-forward-voltage-vs-current-chart-254x300.jpg 254w\" sizes=\"auto, (max-width: 453px) 100vw, 453px\" \/><figcaption class=\"wp-element-caption\"><i><span style=\"font-weight: 400;\">(<\/span><\/i><a href=\"http:\/\/www.learningaboutelectronics.com\/Articles\/Schottky-diode.php\"><i><span style=\"font-weight: 400;\">Image source<\/span><\/i><\/a><i><span style=\"font-weight: 400;\">)<\/span><\/i><\/figcaption><\/figure>\n\n\n\n<p><span style=\"font-weight: 400;\">In the images below we have two circuits to illustrate the benefits of a lower forward voltage drop. The circuit on the left contains a conventional diode, and the one on the right is a Schottky diode. Both are powered with a 2V DC source.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"747\" height=\"189\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/Schottky-diode-circuit.jpg\" alt=\"Conventional diode vs. Schottky Diode\" class=\"wp-image-43313\" srcset=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/Schottky-diode-circuit.jpg 747w, https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/Schottky-diode-circuit-300x76.jpg 300w\" sizes=\"auto, (max-width: 747px) 100vw, 747px\" \/><figcaption class=\"wp-element-caption\"><i><span style=\"font-weight: 400;\">(<\/span><\/i><a href=\"http:\/\/www.learningaboutelectronics.com\/Articles\/Schottky-diode.php\"><i><span style=\"font-weight: 400;\">Image source<\/span><\/i><\/a><i><span style=\"font-weight: 400;\">)<\/span><\/i><\/figcaption><\/figure>\n\n\n\n<p><span style=\"font-weight: 400;\">The conventional diode consumes 0.7V, leaving only 1.3V to power the load. With its lower forward voltage drop, the Schottky diode consumes only 0.3V, leaving 1.7V to power the load. If our load required 1.5V &nbsp;then only the Schottky diode would be up for the job. <\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Other advantages for using a Schottky diode over a regular diode include:<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><b>Faster recovery time<\/b><span style=\"font-weight: 400;\">: The small amount of charge stored within a Schottky diode makes it ideal for high-speed switching applications. <\/span><\/li>\n\n\n\n<li><b>Less noise<\/b><span style=\"font-weight: 400;\">: The Schottky diode will produce less unwanted noise than your typical p-n junction diode. <\/span><\/li>\n\n\n\n<li><b>Better performance<\/b><span style=\"font-weight: 400;\">: The Schottky diode will consume less power and can easily meet low-voltage application requirements. <\/span><\/li>\n<\/ul>\n\n\n<h2 class=\"wp-block-heading\" id=\"disadvantages-of-schottky-diodes\">Disadvantages of Schottky diodes<\/h2>\n\n\n<p><span style=\"font-weight: 400;\">There are some disadvantages to keep in mind about Schottky diodes. A reverse-biased Schottky diode will experience a higher level of reverse current than a traditional diode. This will lead to more leaked current when connected in reverse. <\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">Schottky diodes also have a lower maximum reverse voltage than standard diodes, usually 50V or less. Once this value is exceeded then the Schottky diode will break down and start to conduct a large amount of current in reverse. However, even before reaching this reverse value the Schottky diode will still leak a small amount of current like any other diode. <\/span><\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"how-a-schottky-diode-works\"><span style=\"font-weight: 400;\">How a Schottky Diode Works<\/span><\/h2>\n\n\n<p><span style=\"font-weight: 400;\">A typical diode combines p-type and n-type semiconductors to form a p-n junction. In a Schottky diode metal replaces the p-type semiconductor. This metal can range from platinum to tungsten, molybdenum, gold, etc. <\/span><\/p>\n\n\n\n<p><span style=\"font-weight: 400;\">When metal is combined with an n-type semiconductor an m-s junction is formed. This junction is referred to as a Schottky Barrier. The behavior of the Schottky Barrier will differ depending on whether the diode is in an unbiased, forward-biased, or reverse-biased state.<\/span><\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"unbiased-state\"><span style=\"font-weight: 400;\">Unbiased State<\/span><\/h3>\n\n\n<p><span style=\"font-weight: 400;\">In an unbiased state, free electrons will move from the n-type semiconductor to the metal in order to establish balance. This flow of electrons created the Schottky Barrier where negative and positive ions meet. Free electrons will need a greater supplied energy than their built-in voltage to overcome this barrier. <\/span><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"368\" height=\"361\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2024\/08\/unbiasedschottkydiode.jpg\" alt=\"Unbiased Schottky Diode\" class=\"wp-image-70590\" srcset=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2024\/08\/unbiasedschottkydiode.jpg 368w, https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2024\/08\/unbiasedschottkydiode-300x294.jpg 300w\" sizes=\"auto, (max-width: 368px) 100vw, 368px\" \/><figcaption class=\"wp-element-caption\"><i><span style=\"font-weight: 400;\">(<\/span><\/i><a href=\"http:\/\/www.physics-and-radio-electronics.com\/electronic-devices-and-circuits\/semiconductor-diodes\/schottkydiode.html\"><i><span style=\"font-weight: 400;\">Image source<\/span><\/i><\/a><i><span style=\"font-weight: 400;\">)<\/span><\/i><\/figcaption><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"forwardbiased-state\"><span style=\"font-weight: 400;\">Forward-Biased State<\/span><\/h3>\n\n\n<p><span style=\"font-weight: 400;\">Connecting the positive terminal of a battery to the metal and the negative terminal to the n-type semiconductor will create a forward-biased state. In this state, electrons can cross the junction from n-type to metal if the applied voltage is greater than 0.2 volts. This results in a flow of current that\u2019s typical for most diodes. <\/span><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"405\" height=\"397\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/forwardbiasedschottkydiode.jpg\" alt=\"Forward biased Schottky Diode\" class=\"wp-image-43238\" srcset=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/forwardbiasedschottkydiode.jpg 405w, https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/forwardbiasedschottkydiode-300x294.jpg 300w\" sizes=\"auto, (max-width: 405px) 100vw, 405px\" \/><figcaption class=\"wp-element-caption\"><i><span style=\"font-weight: 400;\">(<\/span><\/i><a href=\"http:\/\/www.physics-and-radio-electronics.com\/electronic-devices-and-circuits\/semiconductor-diodes\/schottkydiode.html\"><i><span style=\"font-weight: 400;\">Image source<\/span><\/i><\/a><i><span style=\"font-weight: 400;\">)<\/span><\/i><\/figcaption><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"reversebiased-state\"><span style=\"font-weight: 400;\">Reverse-Biased State<\/span><\/h3>\n\n\n<p><span style=\"font-weight: 400;\">Connecting the negative terminal of a battery to the metal and positive terminal to the n-type semiconductor will create a reverse-biased state. This state expands the Schottky Barrier and prevents the flow of electric current. However, if the reverse bias voltage continues to increase this can eventually break down the barrier. Doing so will allow current to flow in the reverse direction and may damage the component.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"403\" height=\"380\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/reversebiasedschottkydiode.jpg\" alt=\"REverse biased Schottky Diode\" class=\"wp-image-43228\" srcset=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/reversebiasedschottkydiode.jpg 403w, https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/reversebiasedschottkydiode-300x283.jpg 300w\" sizes=\"auto, (max-width: 403px) 100vw, 403px\" \/><figcaption class=\"wp-element-caption\"><i><span style=\"font-weight: 400;\">(<\/span><\/i><a href=\"http:\/\/www.physics-and-radio-electronics.com\/electronic-devices-and-circuits\/semiconductor-diodes\/schottkydiode.html\"><i><span style=\"font-weight: 400;\">Image source<\/span><\/i><\/a><i><span style=\"font-weight: 400;\">)<\/span><\/i><\/figcaption><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"schottky-diode-manufacturing-amp-parameters\"><span style=\"font-weight: 400;\">Schottky Diode Manufacturing &amp; Parameters<\/span><\/h2>\n\n\n<p><span style=\"font-weight: 400;\">There are a variety of methods to manufacture a Schottky diode. The simplest is to connect a metal wire against a semiconductor surface, called Point Contact. Some Schottky diodes are still manufactured using this method, but it is not known for its reliability.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"201\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2022\/12\/point_contact_diode.gif\" alt=\"Point contact diode\" class=\"wp-image-41828\"\/><figcaption class=\"wp-element-caption\"><i><span style=\"font-weight: 400;\">(<\/span><\/i><a href=\"http:\/\/www.radio-electronics.com\/info\/data\/semicond\/schottky_diode\/technology-structure-operation.php\"><i><span style=\"font-weight: 400;\">Image source<\/span><\/i><\/a><i><span style=\"font-weight: 400;\">)<\/span><\/i><\/figcaption><\/figure>\n\n\n\n<p><span style=\"font-weight: 400;\">The most popular technique is using a vacuum to deposit metal onto the semiconductor surface. This method presents an issue of the metal edges breaking down due to the effects of electric fields around the semiconductor plate. To remedy this, manufacturers will protect the semiconductor plate with an oxide guard ring. Adding this guard ring helps to improve the reverse breakdown threshold and prevents the junction from being physically destroyed.<\/span><\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"control-the-flow\"><span style=\"font-weight: 400;\">Control the Flow<\/span><\/h2>\n\n\n<p><span style=\"font-weight: 400;\">Planning to work on an RF or power application that requires low-voltage operation? Schottky diodes are the way to go! These diodes are well known for their low forward voltage drop and quick switching speeds. Whether they\u2019re used in solar cells or power rectification, you can\u2019t beat the low 0.3V voltage drop and added efficiency. Autodesk EAGLE already includes a ton of free Schottky diode libraries ready to use. No need to make your own. Download Autodesk Fusion for free today!<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how Schottky diodes work in RF circuits, generators, and motor drivers with their low forward voltage drops and fast switching speeds.<\/p>\n","protected":false},"author":3911,"featured_media":70590,"menu_order":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[359],"tags":[207,206],"coauthors":[589],"class_list":["post-18134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electronics-engineering","tag-electronics","tag-pcb","dhig-theme--light"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Schottky Diodes Work - Fusion Blog<\/title>\n<meta name=\"description\" content=\"Learn how Schottky diodes work in RF circuits, generators, and motor drivers with their low forward voltage drops and fast switching speeds.\" \/>\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.autodesk.com\/products\/fusion-360\/blog\/schottky-diodes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Schottky Diodes Work - 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