Unlike semiconductor manufacturing, conformal coating does not always require ultra-high cleanroom levels, but a controlled clean environment<\/strong> is still critical to avoid defects such as dust inclusion, pinholes, bubbles, and poor surface finish.<\/p>\n Typical cleanroom levels<\/strong><\/p>\n For most \u062a\u062c\u0645\u064a\u0639 \u062b\u0646\u0627\u0626\u064a \u0627\u0644\u0641\u064a\u0646\u064a\u0644 \u0645\u062a\u0639\u062f\u062f \u0627\u0644\u0643\u0644\u0648\u0631<\/strong> coating processes, the following standards are commonly used:<\/p>\n \u0641\u064a \u062a\u062c\u0645\u064a\u0639 \u0627\u0644\u0646\u0645\u0648\u0630\u062c \u0627\u0644\u0623\u0648\u0644\u064a \u0644\u062b\u0646\u0627\u0626\u064a \u0627\u0644\u0641\u064a\u0646\u064a\u0644 \u0645\u062a\u0639\u062f\u062f \u0627\u0644\u0643\u0644\u0648\u0631<\/strong>, a full cleanroom may not be necessary, but a clean, dust-free workspace is still required.<\/p>\n Key environmental requirements<\/strong><\/p>\n Air cleanliness and filtration<\/strong> Temperature control<\/strong> Humidity control<\/strong> Airflow management<\/strong> Why cleanroom control is important<\/strong><\/p>\n Cleanroom vs controlled environment<\/strong><\/p>\n Not all coating processes require a full cleanroom. Many manufacturers use a controlled coating zone<\/strong> instead, which includes:<\/p>\n This approach balances cost and performance, especially in standard \u062a\u062c\u0645\u064a\u0639 \u062b\u0646\u0627\u0626\u064a \u0627\u0644\u0641\u064a\u0646\u064a\u0644 \u0645\u062a\u0639\u062f\u062f \u0627\u0644\u0643\u0644\u0648\u0631<\/strong><\/a> operations.<\/p>\n Additional requirements for coating areas<\/strong><\/p>\n ESD control<\/strong>![\"What](\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-cleanroom-requirement-for-coating.jpg\")
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High-efficiency particulate air (HEPA) filters are used to remove airborne particles. Clean airflow reduces the risk of dust settling on wet \u0627\u0644\u0637\u0644\u0627\u0621 \u0627\u0644\u0645\u0637\u0627\u0628\u0642<\/strong> surfaces.<\/p>\n
Stable temperature (typically 20\u201325\u00b0C<\/strong>) ensures consistent coating viscosity and curing behavior in \u062a\u062c\u0645\u064a\u0639 SMT<\/strong><\/a> \u0627\u0644\u0639\u0645\u0644\u064a\u0627\u062a.<\/p>\n
Relative humidity is usually maintained at 40\u201360%<\/strong> to prevent static buildup and avoid moisture-related defects during \u062a\u062c\u0645\u064a\u0639 \u062b\u0646\u0627\u0626\u064a \u0627\u0644\u0641\u064a\u0646\u064a\u0644 \u0645\u062a\u0639\u062f\u062f \u0627\u0644\u0643\u0644\u0648\u0631<\/strong>.<\/p>\n
Laminar or controlled airflow helps direct particles away from coated surfaces. Positive pressure environments prevent external contaminants from entering the coating area.<\/p>\n\n
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Cleanroom environments should also include ESD protection measures to prevent electrostatic damage during \u0627\u0644\u0637\u0644\u0627\u0621 \u0627\u0644\u0645\u0637\u0627\u0628\u0642<\/strong>.<\/p>\n