{"id":2973,"date":"2023-12-07T09:13:09","date_gmt":"2023-12-07T01:13:09","guid":{"rendered":"https:\/\/www.jingpengpcb.com\/?p=2973"},"modified":"2026-10-02T17:38:52","modified_gmt":"2026-10-02T09:38:52","slug":"pcb-process-principles","status":"publish","type":"post","link":"https:\/\/www.jingpengpcb.com\/en\/blog\/pcb-process-principles\/","title":{"rendered":"Basic Principles of PCB Manufacturing"},"content":{"rendered":"<p>This article will introduce some basic principles of PCB manufacturing, which are essential for ensuring circuit performance.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-8717\" src=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/pcb-process-principles-1024x576.jpg\" alt=\"Basic Principles of PCB Manufacturing\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/pcb-process-principles-1024x576.jpg 1024w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/pcb-process-principles-300x169.jpg 300w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/pcb-process-principles-768x432.jpg 768w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/pcb-process-principles.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h2>1. Wire Gauge Selection and Current Load<\/h2>\n<p>The choice of trace width on a PCB should be based on the amount of current flowing through the trace. If the trace width is too narrow, it increases resistance, causing a voltage drop that affects circuit performance. Conversely, if the trace width is too wide, it reduces layout density and increases costs.<\/p>\n<p>Generally speaking, trace widths ranging from 1 to 2.54 millimeters (40 to 100 millimeters) can meet the requirements of most applications. For high-power devices, ground and power lines may require wider trace widths, while for low-power digital circuits, the minimum trace width can be reduced to 0.254 to 1.27 millimeters (10 to 15 millimeters).<\/p>\n<h2>2. Wire Spacing and Withstand Voltage<\/h2>\n<p>The choice of trace spacing depends on the operating voltage of the circuit board. For circuit boards operating at medium to low voltages (not exceeding 200 V), the trace spacing can be set between 1.0 and 1.5 millimeters (40 to 60 millimeters), which ensures an insulation resistance greater than 20 megohms and a dielectric strength of up to 300 V. For low-voltage circuits, such as digital circuit systems, the trace spacing can be even smaller, provided that the manufacturing process allows it.<\/p>\n<h2>3. Pad Design<\/h2>\n<p>The design of the pad must take the component\u2019s power rating into account. For a 1\/8-watt resistor, a pad lead diameter of 28 millimeters is sufficient, while for a 1\/2-watt component, the diameter can be increased to 32 millimeters. If the lead holes are too small, it will be difficult to mount the component; if they are too large, the pad\u2019s adhesion may be reduced, making it prone to detachment.<\/p>\n<h2>4. Design of the Circuit Board Outline<\/h2>\n<p>When designing a PCB, the minimum distance between the border lines and the component pin pads should not be less than 2 millimeters (typically 5 millimeters) to ensure a smooth cutting process.<\/p>\n<h2>5. Principles of Component Layout<\/h2>\n<p>In PCB design, component placement is crucial. Here are some placement principles:<\/p>\n<ul>\n<li>Separate Layout: If a circuit board contains digital circuits, analog circuits, and high-current circuits, they should be laid out separately to minimize mutual interference.<\/li>\n<li>Close to the edge of the circuit board: The input signal processing unit and output signal driver components should be placed close to the edge of the circuit board to minimize the length of the signal lines and reduce interference.<\/li>\n<li>Component Placement Orientation: Components must be arranged only in horizontal and vertical directions to facilitate insertion.<\/li>\n<li>Component spacing: Component spacing depends on the size of the components and the manufacturing process. For small components, such as resistors, capacitors, and diodes, the spacing can be smaller.<\/li>\n<li>Preventing Discharge: When there is a significant potential difference between components, ensure sufficient spacing to prevent discharge.<\/li>\n<\/ul>\n<h2>6. Adding Decoupling Capacitors<\/h2>\n<p>In circuit board design, the inclusion of decoupling capacitors is very important. These capacitors are used to reduce noise and interference in the circuit. Generally, decoupling capacitors ranging from 0.01 to 0.1 microfarads (\u03bcF) are selected based on the reciprocal of the operating frequency. In addition, a 10 \u03bcF capacitor and a 0.01 \u03bcF ceramic capacitor should be added at the power supply input to ensure a stable power supply.<\/p>\n<h2>7. Layout of Clock Circuit Components<\/h2>\n<p>For clock circuits, components should be placed as close as possible to the microcontroller chip\u2019s clock signal pins to minimize the length of the clock circuit\u2019s wiring and ensure stability.<\/p>\n<p>In summary, these fundamental principles are key considerations in the PCB design and manufacturing process, ensuring the performance and reliability of the circuit. As electronic technology continues to advance, PCB manufacturing processes will continue to evolve to meet the growing demand for electronic devices.<\/p>\n<hr \/>\n<h2>Frequently Asked Questions<\/h2>\n<h3>1. What is a PCB?<\/h3>\n<p>PCB stands for printed circuit board, which is a basic component used to support and connect electronic components.<\/p>\n<h3>2. Why are line width and line spacing important?<\/h3>\n<p>The choice of trace width and spacing affects the performance and reliability of a circuit. Appropriate trace width and spacing ensure that the circuit operates properly and prevent interference.<\/p>\n<h3>3. What is a pad?<\/h3>\n<p>A pad is a metal area used to connect electronic components; it is typically used for soldering component leads.<\/p>\n<h3>4. Why is decoupling capacitance necessary?<\/h3>\n<p>Decoupling capacitors are used to reduce noise and interference in circuits, ensuring circuit stability and performance.<\/p>\n<h3>5. Why do clock circuit components require special layout?<\/h3>\n<p>A specific layout of clock circuit components can reduce the delay in clock signal transmission and ensure the accuracy of the clock circuit.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u5c06\u4ecb\u7ecd\u4e00\u4e9b\u5173\u4e8ePCB\u5de5\u827a\u7684\u57fa\u672c\u539f\u5219\uff0c\u8fd9\u4e9b\u539f\u5219\u5bf9\u4e8e\u786e\u4fdd\u7535\u8def\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002 1. \u7ebf\u5bbd\u9009\u62e9\u4e0e\u7535\u6d41\u8d1f\u8377 PCB\u4e0a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8717,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"Basic Principles of PCB Manufacturing","description":"What are the basic principles of PCB manufacturing? This section explains the basis for determining design parameters\u2014from trace width and current load, trace spacing and voltage rating, and pad design to decoupling capacitors and clock component layout\u2014one by one."},"_slim_seo_primary_term_category":0,"_slim_seo_primary_term_post_tag":0,"footnotes":""},"categories":[26],"tags":[228],"class_list":["post-2973","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-pcb"],"_links":{"self":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/2973","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/comments?post=2973"}],"version-history":[{"count":1,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/2973\/revisions"}],"predecessor-version":[{"id":19367,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/2973\/revisions\/19367"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media\/8717"}],"wp:attachment":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media?parent=2973"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/categories?post=2973"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/tags?post=2973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}