{"id":5056,"date":"2026-04-09T14:48:39","date_gmt":"2026-04-09T06:48:39","guid":{"rendered":"https:\/\/txjpcba.com\/?p=5056"},"modified":"2026-04-09T14:48:39","modified_gmt":"2026-04-09T06:48:39","slug":"how-to-prepare-pcb-for-coating","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/zh\/how-to-prepare-pcb-for-coating\/","title":{"rendered":"How to prepare PCB for coating?"},"content":{"rendered":"<h2 data-section-id=\"yo712d\" data-start=\"0\" data-end=\"47\"><span role=\"text\">Prepare PCB for <strong data-start=\"26\" data-end=\"47\">\u5857\u5c64<\/strong><\/span><\/h2>\n<p data-start=\"49\" data-end=\"279\">Proper preparation is essential before applying <strong data-start=\"97\" data-end=\"118\">\u4fdd\u5f62\u5857\u5c64<\/strong> \u65bc <strong data-start=\"122\" data-end=\"138\">PCB \u7d44\u88dd<\/strong> \u548c <strong data-start=\"143\" data-end=\"159\">SMT \u7d44\u88dd<\/strong>. A well-prepared PCB ensures strong adhesion, uniform coverage, and long-term protection against environmental factors.<\/p>\n<figure id=\"attachment_5060\" aria-describedby=\"caption-attachment-5060\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-5060\" src=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-for-coating.jpg\" alt=\"How to prepare PCB for coating\" width=\"800\" height=\"597\" srcset=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-for-coating.jpg 800w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-for-coating-300x224.jpg 300w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-for-coating-768x573.jpg 768w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-for-coating-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-5060\" class=\"wp-caption-text\">How to prepare PCB for coating<\/figcaption><\/figure>\n<h3 data-section-id=\"1a61kau\" data-start=\"281\" data-end=\"303\">Initial inspection<\/h3>\n<p data-start=\"305\" data-end=\"367\">Before any preparation, the PCB should be carefully inspected.<\/p>\n<ul data-start=\"369\" data-end=\"519\">\n<li data-section-id=\"ba2p4w\" data-start=\"369\" data-end=\"426\">Check for solder defects, loose components, or damage<\/li>\n<li data-section-id=\"1xu6r1n\" data-start=\"427\" data-end=\"474\">Ensure all assembly processes are completed<\/li>\n<li data-section-id=\"1y35v0d\" data-start=\"475\" data-end=\"519\">Verify there are no visible contaminants<\/li>\n<\/ul>\n<p data-start=\"521\" data-end=\"626\">Defects should be corrected before coating, as rework becomes more difficult after <a href=\"https:\/\/txjpcba.com\/zh\/%e4%bf%9d%e5%bd%a2%e5%a1%97%e5%b1%a4\/\"><strong data-start=\"604\" data-end=\"625\">\u4fdd\u5f62\u5857\u5c64<\/strong><\/a>.<\/p>\n<h3 data-section-id=\"1fxwzfv\" data-start=\"628\" data-end=\"648\">Cleaning the PCB<\/h3>\n<p data-start=\"650\" data-end=\"697\">Cleaning is the most critical preparation step.<\/p>\n<ul data-start=\"699\" data-end=\"878\">\n<li data-section-id=\"i4vkbc\" data-start=\"699\" data-end=\"753\">Remove flux residues, oils, dust, and fingerprints<\/li>\n<li data-section-id=\"6lo04l\" data-start=\"754\" data-end=\"820\">Use solvent cleaning, aqueous cleaning, or ultrasonic cleaning<\/li>\n<li data-section-id=\"pnlhyo\" data-start=\"821\" data-end=\"878\">Ensure the surface is completely free of contaminants<\/li>\n<\/ul>\n<p data-start=\"880\" data-end=\"949\">A clean surface is essential for proper adhesion in <a href=\"https:\/\/txjpcba.com\/zh\/pcb-%e8%a3%9d%e9%85%8d\/\"><strong data-start=\"932\" data-end=\"948\">PCB \u7d44\u88dd<\/strong><\/a>.<\/p>\n<h3 data-section-id=\"wr8kvb\" data-start=\"951\" data-end=\"976\">Rinsing (if required)<\/h3>\n<p data-start=\"978\" data-end=\"1009\">For aqueous cleaning processes:<\/p>\n<ul data-start=\"1011\" data-end=\"1110\">\n<li data-section-id=\"ms6ei2\" data-start=\"1011\" data-end=\"1057\">Rinse thoroughly with deionized (DI) water<\/li>\n<li data-section-id=\"1vw1z30\" data-start=\"1058\" data-end=\"1110\">Remove any remaining cleaning agents or residues<\/li>\n<\/ul>\n<p data-start=\"1112\" data-end=\"1192\">Improper rinsing can leave ionic contamination that affects coating performance.<\/p>\n<h3 data-section-id=\"epjy9u\" data-start=\"1194\" data-end=\"1225\">Drying and moisture removal<\/h3>\n<p data-start=\"1227\" data-end=\"1274\">After cleaning, the PCB must be completely dry.<\/p>\n<ul data-start=\"1276\" data-end=\"1375\">\n<li data-section-id=\"1y2zdp\" data-start=\"1276\" data-end=\"1327\">Use hot air ovens, vacuum drying, or air drying<\/li>\n<li data-section-id=\"1lyi80e\" data-start=\"1328\" data-end=\"1375\">Eliminate moisture trapped under components<\/li>\n<\/ul>\n<p data-start=\"1377\" data-end=\"1466\">Moisture can cause bubbling, poor adhesion, or corrosion under the <strong data-start=\"1444\" data-end=\"1465\">\u4fdd\u5f62\u5857\u5c64<\/strong>.<\/p>\n<h3 data-section-id=\"bcyipm\" data-start=\"1468\" data-end=\"1495\">Masking sensitive areas<\/h3>\n<p data-start=\"1497\" data-end=\"1546\">Masking protects areas that should not be coated.<\/p>\n<ul data-start=\"1548\" data-end=\"1642\">\n<li data-section-id=\"hede1\" data-start=\"1548\" data-end=\"1593\">Connectors, switches, relays, test points<\/li>\n<li data-section-id=\"1qsurn1\" data-start=\"1594\" data-end=\"1642\">Use masking tapes, plugs, or custom fixtures<\/li>\n<\/ul>\n<p data-start=\"1644\" data-end=\"1729\">Proper masking ensures functionality is maintained after coating in <a href=\"https:\/\/txjpcba.com\/zh\/smt-%e7%b5%84%e8%a3%9d%e6%9c%8d%e5%8b%99\/\"><strong data-start=\"1712\" data-end=\"1728\">SMT \u7d44\u88dd<\/strong><\/a>.<\/p>\n<h3 data-section-id=\"1cgpz8o\" data-start=\"1731\" data-end=\"1764\">Surface activation (optional)<\/h3>\n<p data-start=\"1766\" data-end=\"1835\">In some cases, surface treatment is used to improve coating adhesion.<\/p>\n<ul data-start=\"1837\" data-end=\"1921\">\n<li data-section-id=\"13zlqax\" data-start=\"1837\" data-end=\"1877\">Plasma treatment or corona treatment<\/li>\n<li data-section-id=\"1tfq8ip\" data-start=\"1878\" data-end=\"1921\">Enhances bonding for difficult surfaces<\/li>\n<\/ul>\n<p data-start=\"1923\" data-end=\"1997\">This step is often used in high-reliability <strong data-start=\"1967\" data-end=\"1983\">PCB \u7d44\u88dd<\/strong> \u61c9\u7528\u7a0b\u5f0f\u3002.<\/p>\n<h3 data-section-id=\"1e02i6z\" data-start=\"1999\" data-end=\"2025\">Pre-heating (optional)<\/h3>\n<p data-start=\"2027\" data-end=\"2082\">Pre-heating the PCB before coating can improve results.<\/p>\n<ul data-start=\"2084\" data-end=\"2189\">\n<li data-section-id=\"92s003\" data-start=\"2084\" data-end=\"2125\">Reduces moisture and viscosity issues<\/li>\n<li data-section-id=\"1ysbrd8\" data-start=\"2126\" data-end=\"2155\">Helps coating flow evenly<\/li>\n<li data-section-id=\"a2w4df\" data-start=\"2156\" data-end=\"2189\">Minimizes bubbles and defects<\/li>\n<\/ul>\n<p data-start=\"2191\" data-end=\"2257\">This is especially useful in automated <strong data-start=\"2230\" data-end=\"2246\">SMT \u7d44\u88dd<\/strong> \u6d41\u7a0b\u3002.<\/p>\n<h3 data-section-id=\"v4g7sk\" data-start=\"2259\" data-end=\"2294\">Final inspection before coating<\/h3>\n<p data-start=\"2296\" data-end=\"2357\">Before applying <strong data-start=\"2312\" data-end=\"2333\">\u4fdd\u5f62\u5857\u5c64<\/strong>, perform a final check:<\/p>\n<ul data-start=\"2359\" data-end=\"2475\">\n<li data-section-id=\"10rl3x4\" data-start=\"2359\" data-end=\"2390\">Ensure PCB is clean and dry<\/li>\n<li data-section-id=\"10bd8a\" data-start=\"2391\" data-end=\"2431\">Confirm masking is correctly applied<\/li>\n<li data-section-id=\"13ddmyi\" data-start=\"2432\" data-end=\"2475\">Verify no foreign particles are present<\/li>\n<\/ul>\n<p data-start=\"2477\" data-end=\"2538\">This step ensures readiness for a successful coating process.<\/p>\n<h3 data-section-id=\"8ep03t\" data-start=\"2540\" data-end=\"2560\">\u6700\u5f8c\u7d50\u8ad6<\/h3>\n<p data-start=\"2562\" data-end=\"2885\">Preparing a PCB for <strong data-start=\"2582\" data-end=\"2603\">\u4fdd\u5f62\u5857\u5c64<\/strong> involves inspection, cleaning, drying, masking, and optional surface treatments. In <strong data-start=\"2688\" data-end=\"2704\">PCB \u7d44\u88dd<\/strong> \u548c <strong data-start=\"2709\" data-end=\"2725\">SMT \u7d44\u88dd<\/strong>, proper preparation is the foundation for achieving reliable coating performance, preventing defects, and ensuring long-term protection of electronic products.<\/p>\n<div style=\"background: #f8f8f8; border: 1px solid #e5e5e5; padding: 25px; margin-top: 30px; border-radius: 6px;\">\n<div style=\"text-align: center;\">\n<h3 style=\"margin-bottom: 10px; font-size: 22px;\">\u53d6\u5f97\u4fdd\u5f62\u5857\u5c64\u5831\u50f9<\/h3>\n<p style=\"font-size: 15px; color: #555; margin-bottom: 15px;\">\u6b63\u5728\u898f\u5283\u6709\u5857\u5c64\u9700\u6c42\u7684\u65b0 PCBA \u5c08\u6848\uff1f\u8acb\u5728\u4e0b\u65b9\u7d22\u53d6\u5feb\u901f\u5831\u50f9\u3002.<br \/>\n\u5c07\u60a8\u7684\u9700\u6c42\u50b3\u9001\u7d66\u6211\u5011\uff0c\u4e26\u7372\u5f97\u6211\u5011\u5de5\u7a0b\u5718\u968a\u7684\u5feb\u901f\u56de\u61c9\u3002.<\/p>\n<p style=\"font-size: 14px; color: #333; margin-bottom: 20px;\">24 \u5c0f\u6642\u56de\u61c9 \u2714 \u5de5\u7a0b\u652f\u63f4 \u2714 \u5c0f\u578b\u8207\u5927\u91cf\u751f\u7522<\/p>\n<\/div>\n<div style=\"text-align: left;\"><style id=\"wpforms-css-vars-2237\">\n\t\t\t\t#wpforms-2237 {\n\t\t\t\t--wpforms-field-size-input-height: 43px;\n--wpforms-field-size-input-spacing: 15px;\n--wpforms-field-size-font-size: 16px;\n--wpforms-field-size-line-height: 19px;\n--wpforms-field-size-padding-h: 14px;\n--wpforms-field-size-checkbox-size: 16px;\n--wpforms-field-size-sublabel-spacing: 5px;\n--wpforms-field-size-icon-size: 1;\n--wpforms-label-size-font-size: 16px;\n--wpforms-label-size-line-height: 19px;\n--wpforms-label-size-sublabel-font-size: 14px;\n--wpforms-label-size-sublabel-line-height: 17px;\n--wpforms-button-size-font-size: 17px;\n--wpforms-button-size-height: 41px;\n--wpforms-button-size-padding-h: 15px;\n--wpforms-button-size-margin-top: 10px;\n--wpforms-container-shadow-size-box-shadow: 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