{"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":"2026-05-18T11:59:11","modified_gmt":"2026-05-18T03:59:11","slug":"mcpcb-faq","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2026\/05\/mcpcb-faq\/","title":{"rendered":"MCPCB FAQ"},"content":{"rendered":"
<\/div>
\n

MCPCB Technical FAQ\u2019s<\/h2>\n
\n
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
\n
2. Are you UL certified manufacturer? +<\/span><\/div>\n
Yes, we are UL certified manufacturer, our UL is E475635.<\/div>\n<\/p><\/div>\n
\n
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
\n
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
\n
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
\n
6. How thick is the ENEPIG metal layer finish? +<\/span><\/div>\n
3u\u201d for wire bonding.<\/div>\n<\/p><\/div>\n
\n
7. How thick is the dielectric interlayer between top copper and substrate? +<\/span><\/div>\n
75-100um<\/div>\n<\/p><\/div>\n
\n
8. Is it possible to request a thicker dielectric layer? +<\/span><\/div>\n
Yes, 150um is available.<\/div>\n<\/p><\/div>\n
\n
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
\n
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
\n
11. What is the standard dielectric thickness for aluminum MCPCB? +<\/span><\/div>\n
75um or 100um.<\/div>\n<\/p><\/div>\n
\n
12. Can the dielectric thickness be adjusted? +<\/span><\/div>\n
Yes. Too thin may cause breakdown.<\/div>\n<\/p><\/div>\n
\n
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
\n
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>\n","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":[],"_links":{"self":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/25601","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/comments?post=25601"}],"version-history":[{"count":1,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/25601\/revisions"}],"predecessor-version":[{"id":25603,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/25601\/revisions\/25603"}],"wp:attachment":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media?parent=25601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/categories?post=25601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/tags?post=25601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}