{"id":25601,"date":"2026-05-18T11:58:13","date_gmt":"2026-05-18T03:58:13","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/?p=25601"},"modified":"2026-05-18T15:45:47","modified_gmt":"2026-05-18T07:45:47","slug":"mcpcb-faq","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2026\/05\/mcpcb-faq\/","title":{"rendered":"MCPCB FAQ"},"content":{"rendered":"
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\"MCPCB<\/a><\/figure>\n\n\n
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MCPCB Technical FAQ\u2019s<\/h2>\n
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1. Can you tell me the minimum specs for smoothly manufacturing 2 layer Metal Core PCBs at your facility? +<\/span><\/div>\n
Minimum hole diameter: 0.5mm; Minimum spacing between hole edge and hole edge: 1.5mm; Minimum circuit width and spacing: 1OZ(0.2mm) \/ 2OZ(0.25mm); Minimum final board thickness: 0.8mm<\/div>\n<\/p><\/div>\n
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2. Are you UL certified manufacturer? +<\/span><\/div>\n
Yes, we are UL certified manufacturer, our UL is E475635.<\/div>\n<\/p><\/div>\n
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3. Can the aluminum be made as the base of sinkpad? +<\/span><\/div>\n
Actually, the sinkpad can only use copper as the base. Aluminum cannot react with etching acid directly, which makes the process complex and increases scrap rate.<\/div>\n<\/p><\/div>\n
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4. Would you have white papers explaining technical comparisons between FR4 and MCPCB? +<\/span><\/div>\n
MCPCB has better thermal conductivity, generally 3-4 times more expensive than FR4. It efficiently dissipates heat via a thermal dielectric layer, while FR4 retains heat.<\/div>\n<\/p><\/div>\n
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5. Is the backside of the PCB coated or exposed copper? +<\/span><\/div>\n
Normally, the copper is exposed. ENEPIG coating is available but more expensive.<\/div>\n<\/p><\/div>\n
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6. How thick is the ENEPIG metal layer finish? +<\/span><\/div>\n
3u\u201d for wire bonding.<\/div>\n<\/p><\/div>\n
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7. How thick is the dielectric interlayer between top copper and substrate? +<\/span><\/div>\n
75-100um<\/div>\n<\/p><\/div>\n
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8. Is it possible to request a thicker dielectric layer? +<\/span><\/div>\n
Yes, 150um is available.<\/div>\n<\/p><\/div>\n
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9. Which dielectric do you recommend for 90+W LED products? +<\/span><\/div>\n
3W\/m\u00b7k or 2W\/m\u00b7k is better than 1W\/m\u00b7k.<\/div>\n<\/p><\/div>\n
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10. Can you do bevel and chamfer features in metal core technology? +<\/span><\/div>\n
Yes. Routing: \u00b10.15~0.2mm tolerance, rough surface; Carving: \u00b10.1mm tolerance, higher cost.<\/div>\n<\/p><\/div>\n
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11. What is the standard dielectric thickness for aluminum MCPCB? +<\/span><\/div>\n
75um or 100um.<\/div>\n<\/p><\/div>\n
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12. Can the dielectric thickness be adjusted? +<\/span><\/div>\n
Yes. Too thin may cause breakdown.<\/div>\n<\/p><\/div>\n
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13. Is 2.0 W\/(m\u00b7K) the highest thermal conductivity available? +<\/span><\/div>\n
No, we offer 3.0 W\/(m\u00b7K).<\/div>\n<\/p><\/div>\n
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14. Can 1-layer SinkPAD use lead-free HASL? +<\/span><\/div>\n
Not recommended. Risk of delamination and chemical reaction. OSP is preferred.<\/div>\n<\/p><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

MCPCB Technical FAQ\u2019s 1. Can you tell me the minimum specs for smoothly manufacturing 2 layer Metal Core PCBs at your facility? + Minimum hole diameter: 0.5mm; Minimum spacing between hole edge and hole edge: 1.5mm; Minimum circuit width and spacing: 1OZ(0.2mm) \/ 2OZ(0.25mm); Minimum final board thickness: 0.8mm 2. Are you UL certified manufacturer? […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[5694],"tags":[5700,34],"class_list":["post-25601","post","type-post","status-publish","format-standard","hentry","category-technical-faqs","tag-faq","tag-mcpcb"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t