{"id":144,"date":"2025-06-24T01:47:40","date_gmt":"2025-06-24T01:47:40","guid":{"rendered":"http:\/\/benchuangpcba.com\/?p=144"},"modified":"2026-08-21T06:51:12","modified_gmt":"2026-08-21T06:51:12","slug":"mehrlagige-leiterplatten","status":"publish","type":"post","link":"https:\/\/benchuangpcba.com\/de\/multilayer-pcbs\/","title":{"rendered":"Multilayer PCB Manufacturer for Prototype and Production"},"content":{"rendered":"
\n

Multilayer PCB Stack-Up and Material Review<\/h2>\n

A multilayer PCB combines outer and inner copper layers through one or more lamination cycles. The released stack-up should define core and prepreg construction, dielectric thicknesses, copper weights, finished thickness, material category, impedance relationships and any blind, buried or laser-via structure. Layer naming in the manufacturing data, stack-up drawing and impedance table must be consistent.<\/p>\n

Material selection is reviewed against electrical performance, thermal requirements, finished thickness, copper and process route. Copper distribution and resin demand affect lamination, registration and flatness, so plane areas, heavy-copper regions and asymmetric constructions must be assessed before the panel plan is released.<\/p>\n<\/section>\n

\n

Multilayer PCB Manufacturing Capabilities<\/h2>\n

Capability combinations depend on the complete board design. Final manufacturability is confirmed after reviewing the stack-up, material, copper, via structure, panel layout and order quantity.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nPrototype\/Sample<\/th>\nProduction<\/th>\n<\/tr>\n<\/thead>\n
Maximum layer count<\/td>\n32 layers<\/td>\n18 layers<\/td>\n<\/tr>\n
Finished board thickness<\/td>\nUp to 6.0 mm<\/td>\nUp to 2.8 mm<\/td>\n<\/tr>\n
Minimum dielectric thickness<\/td>\n0.060 mm<\/td>\n0.064 mm<\/td>\n<\/tr>\n
Material categories<\/td>\nFR-4 \/ M2 \/ M4 \/ M6 \/ M7<\/td>\nFR-4 \/ M2 \/ M4 \/ M6<\/td>\n<\/tr>\n
Minimum through-hole drill<\/td>\n0.15 mm<\/td>\n0.15 mm<\/td>\n<\/tr>\n
Maximum PTH aspect ratio<\/td>\n14:1<\/td>\n10:1<\/td>\n<\/tr>\n
Minimum inner-layer line\/space<\/td>\n45\/45 \u00b5m<\/td>\n45\/50 \u00b5m<\/td>\n<\/tr>\n
Minimum outer-layer line\/space<\/td>\n45\/45 \u00b5m<\/td>\n45\/50 \u00b5m<\/td>\n<\/tr>\n
Controlled-impedance tolerance<\/td>\n\u00b19%<\/td>\n\u00b110%<\/td>\n<\/tr>\n
Minimum drill\/pad<\/td>\n0.12\/0.25 mm<\/td>\n0.15\/0.30 mm<\/td>\n<\/tr>\n
Inner-layer copper<\/td>\n0.33\u20135 oz<\/td>\n0.33\u20134 oz<\/td>\n<\/tr>\n
Outer-layer copper<\/td>\n0.33\u20135 oz<\/td>\n0.33\u20135 oz<\/td>\n<\/tr>\n
Maximum production panel<\/td>\n600 \u00d7 400 mm<\/td>\n600 \u00d7 400 mm<\/td>\n<\/tr>\n
Surface finishes<\/td>\nENIG, OSP, OSP + ENIG, ENEPIG, plated gold fingers<\/td>\nSame options<\/td>\n<\/tr>\n
Special processes<\/td>\nPOFV, countersink, backdrill, castellated\/half holes, side plating<\/td>\nAvailable by design review<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
\n

Lamination, Registration and Copper Balance<\/h2>\n

Multilayer fabrication requires consistent inner-layer imaging and etching, controlled oxide or bonding preparation, material lay-up, lamination and registration before drilling and plating. DFM review checks dielectric selection, resin demand, copper distribution, layer symmetry, tooling strategy, dimensional compensation and the relationship between holes, pads and inner-layer clearances.<\/p>\n

Heavy copper, large plane areas, mixed copper densities and asymmetric stack-ups can influence resin fill and flatness. If the design uses controlled-depth features, cavities, sequential lamination or other special constructions, identify them in the fabrication drawing and do not rely on layer filenames alone.<\/p>\n<\/section>\n

\n

Through-Holes, Blind\/Buried Vias and Special Processes<\/h2>\n

The via table should separate plated through holes, non-plated holes, blind vias, buried vias and laser microvias. For each structure, define the drill or finished diameter, layer span, pad sizes, fill and cap requirements and any stacked or staggered arrangement. Aspect ratio, copper thickness, finished board thickness and hole tolerance must be reviewed together.<\/p>\n

Special processes such as plated-over-filled vias, backdrilling, countersinks, castellated or half holes and side plating require dedicated drawing notes and acceptance criteria. For backdrilling, provide the target layer, residual-stub requirement and verification method. Availability is confirmed against the complete design.<\/p>\n<\/section>\n

\n

Controlled Impedance and Quality Control<\/h2>\n

Controlled impedance is tied to the approved stack-up, dielectric properties and thickness, trace width and spacing, finished copper, reference planes and test method. Provide single-ended and differential targets with layer references and identify whether the values are design targets or test limits. Coupon design and measurement requirements should be released with the board data.<\/p>\n

Manufacturing and acceptance controls may include material verification, AOI, electrical testing, dimensional and visual inspection, impedance testing, metallographic inspection, finish-thickness measurement and environmental or reliability testing when specified. State the required reports, sample plan and pass\/fail criteria in the quotation package.<\/p>\n<\/section>\n

\n

Representative Multilayer PCB Samples<\/h2>\n
\"Eight-layer
Representative sample: 8-layer FR-4 SY1000-2 construction, black solder mask, ENIG, 3\/3 mil line\/space and \u00b17% impedance. These are sample-specific values, not blanket production limits.<\/figcaption><\/figure>\n
\"Microsection
Microsection of a 20-layer multilayer PCB. No customer, application, yield or reliability result is inferred from this image.<\/figcaption><\/figure>\n<\/section>\n
\n

Typical Multilayer PCB Applications<\/h2>\n
    \n
  • Communication, networking and intelligent-terminal equipment<\/li>\n
  • Industrial control and instrumentation<\/li>\n
  • Computing and data-processing hardware<\/li>\n
  • Automotive and medical electronics subject to project-specific requirements<\/li>\n
  • Aerospace and other high-reliability programs subject to qualification<\/li>\n<\/ul>\n<\/section>\n
    \n

    Information Needed for a Multilayer PCB Quotation<\/h2>\n
      \n
    • Gerber, ODB++ or IPC-2581 data, NC drill files and a dimensioned fabrication drawing<\/li>\n
    • Released layer stack-up, material category or exact grade, dielectric and copper thicknesses<\/li>\n
    • Finished dimensions and thickness, via table, fill\/cap rules and special-process notes<\/li>\n
    • Single-ended\/differential impedance table, reference layers, coupon and test requirements<\/li>\n
    • Surface finish, solder mask, legend, panel delivery and inspection\/report requirements<\/li>\n
    • Prototype, pilot or production quantity, target date and shipping destination<\/li>\n<\/ul>\n

      Describe the key requirements in the Message field. Our team will confirm the file-transfer method for the complete manufacturing package after receiving the inquiry.<\/p>\n<\/section>\n

      \n

      Send Your Multilayer PCB Project Details<\/h2>\n

      Include the layer count, stack-up, material, copper, via structure, impedance requirements, quantity and target date. Our team will confirm the file-transfer method for the complete technical package.<\/p>\n