{"id":4981,"date":"2026-05-28T09:29:38","date_gmt":"2026-05-28T09:29:38","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4981"},"modified":"2026-05-28T09:29:40","modified_gmt":"2026-05-28T09:29:40","slug":"ceramic-pcb-design-manufacturing-guide","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/es\/ceramic-pcb-design-manufacturing-guide\/","title":{"rendered":"Circuitos impresos cer\u00e1micos: Gu\u00eda completa de dise\u00f1o y fabricaci\u00f3n"},"content":{"rendered":"

What Is a Ceramic PCB?<\/h2>\n\n\n\n

A ceramic PCB uses an inorganic ceramic substrate instead of traditional FR\u20114<\/a> fiberglass.\u00a0Common substrate materials are alumina\u00a0(Al\u2082O\u2083),\u00a0aluminum nitride\u00a0(AlN),\u00a0and beryllium oxide\u00a0(BeO).\u00a0These boards conduct heat far better than organic laminates.\u00a0Also,\u00a0they withstand temperatures up to 350\u00b0C for standard alumina and even higher for SiC.\u00a0Engineers choose ceramic PCBs when they need high thermal conductivity,\u00a0stable electrical performance at high frequencies,\u00a0or a coefficient of thermal expansion\u00a0(CTE)\u00a0that matches silicon chips.\u00a0Unlike metal\u2011core boards,\u00a0ceramic has no isolation layer between the component and the heat\u2011spreading material.\u00a0Components sit directly on the ceramic,\u00a0which cuts thermal resistance.\u00a0This direct path keeps junction temperatures low and extends product life.<\/p>\n\n\n\n

Types of Ceramic PCBs<\/h2>\n\n\n\n

There are three main process families. Each suits different performance and cost targets.<\/p>\n\n\n\n

\"Types<\/figure>\n\n\n\n

High\u2011Temperature Co\u2011fired Ceramic (HTCC)<\/h3>\n\n\n\n

HTCC uses alumina substrate with refractory metal pastes\u2014tungsten or molybdenum. We screen\u2011print the circuit pattern on green ceramic tape, stack layers, and then fire everything at 1600\u20131700\u00b0C in a reducing gas (hydrogen) atmosphere. The high temperature sinters the ceramic and metal together into a monolithic board. HTCC works well for small, high\u2011layer\u2011count substrates. But the extreme firing causes 15\u201320% shrinkage; we compensate for this scaling during CAM design. The refractory metals have higher resistivity than copper, so HTCC traces show more loss. Use HTCC when you need many layers (up to 10) and can accept wider line widths. Our factory can hold 100 \u00b5m line\/space after shrinkage correction.<\/p>\n\n\n\n

Low\u2011Temperature Co\u2011fired Ceramic (LTCC)<\/h3>\n\n\n\n

LTCC fires at around 900\u00b0C.\u00a0This lower temperature lets us use precious\u2011metal pastes\u2014gold,\u00a0silver,\u00a0or gold\u2011palladium.\u00a0The substrate starts as a glass\u2011ceramic composite tape.\u00a0We print conductors,\u00a0punch vias with a laser or mechanical punch,\u00a0fill them with paste,\u00a0and laminate the layers.\u00a0The co\u2011firing in an oxidizing oven bonds everything.\u00a0LTCC gives better dimensional control than HTCC\u00a0(only 0.1\u20130.2%\u00a0shrinkage),\u00a0so we achieve finer lines:\u00a075 \u00b5m trace\/space typical.\u00a0Because the fired metal is gold,\u00a0solder wetting requires special pad coatings.\u00a0We often add ENIG\u00a0(electroless nickel immersion gold)<\/a>\u00a0as a final finish.\u00a0LTCC excels for RF and mixed\u2011signal applications because the dielectric constant is uniform and low\u2011loss.<\/p>\n\n\n\n

Thick Film Ceramic PCB<\/h3>\n\n\n\n

Thick film technology starts with a pre\u2011fired ceramic substrate (usually 96% alumina). We screen\u2011print conductive, resistive, and dielectric pastes layer by layer. Each layer fires at 850\u20131000\u00b0C. Conductor pastes are gold or silver\u2011palladium; dielectric pastes insulate between layers. After firing, we can laser\u2011trim resistors to \u00b11% tolerance. Thick film is the lowest\u2011cost ceramic process for prototyping and moderate volumes. Multilayer thick film copper is a modern variant: we print copper pastes and fire in nitrogen atmosphere. This solves gold\u2011paste cost and solderability issues. Thick film boards can handle 10\u201315 \u00b5m finished copper thickness, enough for most power circuits up to 10 A.<\/p>\n\n\n\n

Ceramic PCB Materials Comparison<\/h2>\n\n\n\n

Choosing the right ceramic directly affects thermal performance and cost.<\/p>\n\n\n\n

Material<\/th>Conductividad t\u00e9rmica (W\/m-K)<\/th>CTE (ppm\/\u00b0C)<\/th>Constante diel\u00e9ctrica<\/th>Max Operating Temp (\u00b0C)<\/th>Typical Use Case<\/th><\/tr><\/thead>
Alumina 96%<\/td>20\u201324<\/td>6.5\u20137.0<\/td>9.4<\/td>350<\/td>LED modules, power hybrids<\/td><\/tr>
Alumina 99.6%<\/td>28\u201330<\/td>7.0<\/td>9.8<\/td>350<\/td>RF substrates, chip carriers<\/td><\/tr>
Aluminum Nitride (AlN)<\/td>170\u2013230<\/td>4.5<\/td>8.8<\/td>400<\/td>High\u2011power GaN amplifiers, EV inverters<\/td><\/tr>
Beryllium Oxide (BeO)<\/td>260<\/td>6.4<\/td>6.7<\/td>450<\/td>Military radars (toxic\u2014special handling)<\/td><\/tr>
Silicon Carbide (SiC)<\/td>120\u2011270<\/td>4.0<\/td>40<\/td>800+<\/td>Extreme high\u2011temp sensors<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Alumina 96% provides the best price\u2011performance balance. AlN costs about 3\u00d7 more but cuts junction temperature by over 20\u00b0C in a 50 W design. That extra thermal headroom can double the system\u2019s mean time between failures. Our factory stocks both 96% and 99.6% alumina blanks in 4\u2033\u00d74\u2033 and 6\u2033\u00d78\u2033 panels. AlN blanks are available on request with slightly longer lead times.<\/p>\n\n\n\n

Key Advantages of Ceramic PCBs<\/h2>\n\n\n\n

Exceptional Thermal Conductivity<\/h3>\n\n\n\n

FR\u20114 conducts heat at about 0.25 W\/m\u00b7K. Even standard alumina (24 W\/m\u00b7K) moves heat 96 times faster. Aluminum nitride manages 170\u2013230 W\/m\u00b7K. This means a 1\u2011ounce copper plane on ceramic acts as an efficient heat spreader. For example, a 2 mm\u2011wide, 0.3 mm\u2011thick copper trace at 100 A will rise only 5\u00b0C above ambient on an alumina board. The same trace on FR\u20114 would overheat and delaminate. Direct component mounting on ceramic eliminates thermal interface material layers, reducing total junction\u2011to\u2011ambient resistance.<\/p>\n\n\n\n

High\u2011Temperature Resistance<\/h3>\n\n\n\n

Our HTCC and thick film alumina boards operate continuously at 350\u00b0C. SiC boards go beyond 800\u00b0C. Traditional FR\u20114 has a glass transition temperature (Tg) of 130\u2013170\u00b0C; it softens and fails well below 200\u00b0C. This high\u2011temperature tolerance makes ceramic PCBs indispensable for down\u2011hole drilling tools, missile guidance, and under\u2011hood automotive sensors.<\/p>\n\n\n\n

Low CTE Matching Silicon and Ceramic Packages<\/h3>\n\n\n\n

Silicon chips expand at about 2.6 ppm\/\u00b0C. Leadless ceramic chip carriers (LCCC) have a CTE of 6\u20117 ppm\/\u00b0C. FR\u20114 expands at 14\u201317 ppm\/\u00b0C. This mismatch causes solder joint fatigue during thermal cycling. A ceramic PCB with 6.5 ppm\/\u00b0C CTE almost perfectly matches the package. In our reliability tests, ceramic\u2011to\u2011LCCC solder joints survive 2,000 thermal shock cycles (\u221255\u00b0C to +125\u00b0C) without crack growth, while the same joints on FR\u20114 fail after 500 cycles.<\/p>\n\n\n\n

Superior Electrical Insulation and High\u2011Frequency Performance<\/h3>\n\n\n\n

Dielectric strength exceeds 20 kV\/mm on alumina. The dielectric constant stays stable across temperature and frequency, with low loss tangent. This allows high\u2011impedance\u2011control traces for RF up to 20 GHz. For mixed\u2011signal LTCC boards, parasitic capacitance can drop by almost 90% compared to FR\u20114 designs. That reduction cuts crosstalk and improves analog\u2011to\u2011digital conversion accuracy.<\/p>\n\n\n\n

Mechanical Strength and Long\u2011Term Stability<\/h3>\n\n\n\n

Despite being brittle,\u00a0ceramic substrates have high compressive strength\u00a0(alumina\u00a0~2,000 MPa).\u00a0They resist chemical erosion from fuels,\u00a0acids,\u00a0and cleaning solvents.\u00a0Humidity absorption is near zero,\u00a0so electrical properties do not drift.\u00a0Our boards meet IPC\u2011TM\u2011650 <\/a>moisture resistance tests without any degradation.<\/p>\n\n\n\n

High\u2011Density Integration and Miniaturization<\/h3>\n\n\n\n

We use laser\u2011drilled microvias down to 0.06 mm diameter. Together with fine\u2011line LTCC processes (75 \u00b5m line\/space), you can pack more components in a smaller area. Multilayer co\u2011firing lets us embed passive components\u2014resistors, capacitors\u2014inside the substrate during sintering. This frees surface area for active chips and connectors. A single LTCC board can replace a whole multi\u2011board FR\u20114 assembly, reducing weight and volume.<\/p>\n\n\n\n

\"High\u2011Density<\/figure>\n\n\n\n

Why Use Ceramic PCB Over Other Boards?<\/h2>\n\n\n\n

Thermal Conductivity: The Real Numbers<\/h3>\n\n\n\n

FR\u20114: 0.25 W\/m\u00b7K. MCPCB (aluminum back): 1\u20112 W\/m\u00b7K, but still uses a dielectric isolation layer, creating a bottleneck. Alumina ceramic: 24 W\/m\u00b7K, with no isolation layer. So heat flows instantly from the component pad to the ceramic body. A 10 W LED on an MCPCB might reach junction temperature 120\u00b0C; the same LED on alumina stays below 100\u00b0C. This cooler operation doubles the lumen maintenance life.<\/p>\n\n\n\n

Price Comparison and Total Cost of Ownership<\/h3>\n\n\n\n

Ceramic boards cost more per unit area. A 2\u2011layer 96% alumina board (100 \u00d7 80 mm) costs about $0.8\u20131.2\/cm\u00b2 in volume (100\u2011plus pieces). An equivalent FR\u20114 four\u2011layer board is $0.10\/cm\u00b2. But the system cost tells a different story. Ceramic eliminates the need for thermal pads, heat spreaders, and large heatsinks. For a 50 W power supply, the savings on cooling hardware and assembly labor often exceed $10 per unit. The ceramic version also reduces field returns. Over the product lifetime, ceramic provides a lower total cost of ownership.<\/p>\n\n\n\n

Technology Practices: When Ceramic Wins<\/h3>\n\n\n\n

Use ceramic when:<\/p>\n\n\n\n

    \n
  • Junction temperature must stay below 150\u00b0C with high ambient.<\/li>\n\n\n\n
  • The design has many CTE\u2011sensitive components (bare die, ceramic packaged ICs).<\/li>\n\n\n\n
  • You need RF performance above 5 GHz.<\/li>\n\n\n\n
  • The product faces severe vibration or corrosive environments.<\/li>\n\n\n\n
  • Miniaturization demands blind\/buried vias and embedded passives.<\/li>\n<\/ul>\n\n\n\n

    If your constraints are only moderate heat and cost is primary, MCPCB or thick\u2011copper FR\u20114 may suffice. But once you hit a thermal wall, ceramic solves the problem.<\/p>\n\n\n\n

    How to Manufacture a Ceramic PCB?<\/h2>\n\n\n\n

    We use four main production flows in our factory. I will walk through each simply.<\/p>\n\n\n\n

    HTCC Process<\/h3>\n\n\n\n
      \n
    1. Tape casting:<\/strong>\u00a0We mix alumina powder with organic binder and cast into thin green sheets.<\/li>\n\n\n\n
    2. Blanking and via punching:<\/strong>\u00a0We cut sheets to panel size and punch or laser drill vias.<\/li>\n\n\n\n
    3. Via filling and printing:<\/strong>\u00a0Fill vias with tungsten paste. Screen\u2011print conductor traces on each layer.<\/li>\n\n\n\n
    4. Lamination:<\/strong>\u00a0Stack layers in a press under heat and pressure.<\/li>\n\n\n\n
    5. Co\u2011firing:<\/strong>\u00a0Heat the laminated stack to 1600\u20131700\u00b0C for 32\u201348 hours in a hydrogen\u2011nitrogen controlled atmosphere. The binder burns out, and ceramic sinters with metal.<\/li>\n\n\n\n
    6. Post\u2011processing:<\/strong>\u00a0Laser trim any embedded resistors. Add surface finishes (ENIG, immersion silver) if needed.<\/li>\n<\/ol>\n\n\n\n

      LTCC Process<\/h3>\n\n\n\n

      Same steps but with glass\u2011ceramic tape, gold paste, and firing at 900\u00b0C in air. No hydrogen needed. Via sizes go down to 0.1 mm. We can embed inductors and capacitors inside the stack.<\/p>\n\n\n\n

      Thick Film Process<\/h3>\n\n\n\n
        \n
      1. Start with a pre\u2011fired alumina substrate.<\/li>\n\n\n\n
      2. Screen print conductor layer (gold or silver\u2011palladium), dry, and fire at 850\u20131000\u00b0C.<\/li>\n\n\n\n
      3. Print dielectric layer to insulate, then fire.<\/li>\n\n\n\n
      4. Repeat for each layer. For thick film copper, print and fire in nitrogen.<\/li>\n\n\n\n
      5. Apply final overglaze or solder mask (if required).<\/li>\n\n\n\n
      6. Laser trim resistors to value.<\/li>\n<\/ol>\n\n\n\n

        Typical thick film specifications: line\/space 125 \u00b5m, via diameter 0.3 mm, up to 4 conductor layers, finished copper thickness 10\u201315 \u00b5m per layer.<\/p>\n\n\n\n

        Direct Plated Copper (DPC) and Direct Bonded Copper (DCB)<\/h3>\n\n\n\n

        These are simpler methods for single\u2011 or double\u2011sided boards. DPC sputter\u2011deposits a copper seed layer on ceramic, then electroplates to desired thickness. DCB bonds a thick copper foil (0.1\u20110.3 mm) directly onto alumina or AlN at high temperature in nitrogen. We use DPC for LED packages and DCB for high\u2011current IGBT modules. Both deliver excellent thermal performance with copper thicknesses up to 300 \u00b5m.<\/p>\n\n\n\n

        Our factory keeps standard panel sizes: 4\u2033\u00d74\u2033, 5\u2033\u00d75\u2033, 6\u2033\u00d78\u2033, and 8\u2033\u00d710\u2033. Layer counts range from 1 to 6 for thick film, up to 10 for HTCC\/LTCC. We achieve 75 \u00b5m line\/space on LTCC, 100 \u00b5m on HTCC. Surface finishes include ENIG, ENEPIG, immersion silver, and pure gold wire\u2011bondable soft gold.<\/p>\n\n\n\n

        Ceramic PCB Design Guidelines and DFM Checklist<\/h2>\n\n\n\n

        Designing with ceramic requires special care to avoid cracks and yield loss. I will give you the top rules from our factory\u2019s 15\u2011year experience.<\/p>\n\n\n\n

        \"Ceramic<\/figure>\n\n\n\n

        Via\u2011to\u2011Edge Clearance<\/h3>\n\n\n\n

        The most common failure we see is a cracked via near the board edge. Ceramic is brittle. When we depan panelize boards with a diamond saw or laser, micro\u2011cracks can propagate inward. Keep all via centers at least 2.0 mm from the final board edge. If the design forces a closer via, use tear\u2011drop pads to reinforce. A teardrop length of 0.5\u00d7 the pad diameter adds significant crack resistance.<\/p>\n\n\n\n

        Via Pad and Hole Design<\/h3>\n\n\n\n

        Use tear\u2011drops on every via and SMD pad. This distributes mechanical stress. Minimum annular ring should be 0.15 mm for Class 3 reliability. Avoid placing vias under BGA corners where stress concentrates during thermal cycling.<\/p>\n\n\n\n

        Soldering Profile<\/h3>\n\n\n\n

        Ceramic has high thermal mass and conductivity. Preheat becomes critical. Our assembly shop uses a ramp rate of 2.5\u00b0C\/second, a soak at 150\u2013170\u00b0C for 90 seconds, and a peak reflow temperature of 245\u00b0C for SAC305 solder. The board must stay above 217\u00b0C for only 45\u201360 seconds to avoid overheating sensitive components. For THT, use a controlled\u2011heat soldering iron and pre\u2011heat the board locally. Never apply direct flame.<\/p>\n\n\n\n

        Component Placement and Handling<\/h3>\n\n\n\n

        Place heavy components (transformers, high\u2011power resistors) away from edges and corners. Use under\u2011fill for large BGA packages to manage any CTE difference between the ceramic board and the chip\u2019s organic substrate. During manual handling, use ESD\u2011safe tweezers with soft tips. Ceramic edges are sharp; wear gloves. Our operators use vacuum chucks to move large panels.<\/p>\n\n\n\n

        Impedance Control and RF Traces<\/h3>\n\n\n\n

        Ceramic\u2019s dielectric constant (9.4\u20139.8) differs from FR\u20114 (4.5). Always recalculate trace dimensions using a proper field solver, not a generic FR\u20114 calculator. For a 50\u2011\u03a9 microstrip on 0.635 mm thick 96% alumina, the trace width is about 0.6 mm. We provide stack\u2011up data and controlled\u2011impedance testing for differential pairs up to 20 GHz.<\/p>\n\n\n\n

        PTH and Via Fill<\/h3>\n\n\n\n

        We fill vias with conductive paste during co\u2011firing. In thick film, vias are filled with dielectric or left open. Specify via\u2011in\u2011pad design if you need filled and plated\u2011over vias. We can planarize the surface with a grind process for fine\u2011pitch BGA.<\/p>\n\n\n\n

        Applications of Ceramic PCBs<\/h2>\n\n\n\n

        Memory Modules and High\u2011Speed Digital<\/h3>\n\n\n\n

        High\u2011speed DDR memory modules benefit from ceramic\u2019s low dielectric loss and thermal stability. Our customers use LTCC boards to route 64\u2011bit buses with minimized skew. The consistent dielectric constant reduces inter\u2011symbol interference.<\/p>\n\n\n\n

        Receiving\/Transmission Modules (RF)<\/h3>\n\n\n\n

        Satellite communication transceivers demand low\u2011loss substrates. Alumina and AlN boards with 0.06 mm laser vias enable compact phased\u2011array antennas. For a 50 W satellite power amplifier, an AlN board kept peak temperature under 150\u00b0C. The design operated reliably in vacuum without convection cooling.<\/p>\n\n\n\n

        Multilayer Interconnect Boards<\/h3>\n\n\n\n

        Using HTCC\/LTCC, we integrate up to 30 embedded passive components inside a 6\u2011layer board. This shrinks a 4\u2011board FR\u20114 stack into one ceramic module. A customer in the aerospace sector reduced weight by 70% and increased connection density by 5\u00d7.<\/p>\n\n\n\n

        Analog\/Digital Mixed\u2011Signal PCBs<\/h3>\n\n\n\n

        Parasitic capacitance harms ADC performance. With LTCC, we reduced parasitic capacitance between analog and digital sections by about 90% compared to the same circuit on FR\u20114. The board\u2019s noise floor dropped by 12 dB.<\/p>\n\n\n\n

        Aerospace and Avionics<\/h3>\n\n\n\n

        Missile control systems operate at 300\u00b0C ambient. Our HTCC boards survive thousands of shock and vibration cycles. No conformal coating needed because ceramic is inert.<\/p>\n\n\n\n

        Automotive and EV Power Electronics<\/h3>\n\n\n\n

        An electric vehicle charging station uses an AlN DCB board to handle 200 A continuously. Temperature rise stays below 20\u00b0C. The board passes IATF 16949 qualification.<\/p>\n\n\n\n

        High\u2011Power LED Lighting<\/h3>\n\n\n\n

        A 10 W LED on our thick\u2011film alumina board shows a junction temperature of 105\u00b0C, well below the 120\u00b0C limit. The same LED on MCPCB reaches 130\u00b0C. This direct bond improves lumen output and lifetime.<\/p>\n\n\n\n

        Ceramic PCB Procurement: Cost, Lead Time, and MOQ<\/h2>\n\n\n\n

        Realistic numbers help you plan your project budget and schedule.<\/p>\n\n\n\n

        Ceramic PCB Cost Breakdown<\/h3>\n\n\n\n
          \n
        • 2\u2011layer 96% alumina, thick\u2011film silver conductor, 100\u00d780 mm, ENIG finish: $8\u201112\/pc at 100 pieces.<\/li>\n\n\n\n
        • 2\u2011layer 96% alumina, thick\u2011film copper: $10\u201115\/pc.<\/li>\n\n\n\n
        • 4\u2011layer LTCC gold conductor, same size: $25\u201140\/pc (due to more process steps).<\/li>\n\n\n\n
        • 1\u2011layer AlN DPC board for LED: $1\u20112 per cm\u00b2. These prices exclude tooling charges. Tooling (screen tools, photomasks) typically costs $500\u20111,000, which we amortize over volume.<\/li>\n<\/ul>\n\n\n\n

          Minimum Order Quantity (MOQ)<\/h3>\n\n\n\n

          For standard thick film process, we accept orders as low as 10 pieces. For LTCC and HTCC, MOQ is 50 pieces due to the fixed co\u2011firing batch size. Prototype runs are available with shorter lead times.<\/p>\n\n\n\n

          Lead Times<\/h3>\n\n\n\n
            \n
          • Thick film 2\u2011layer prototype: 10\u201112 working days (including laser trimming)<\/li>\n\n\n\n
          • LTCC 4\u2011layer prototype: 18\u201120 working days<\/li>\n\n\n\n
          • Production orders: 15\u201125 days depending on volume<\/li>\n\n\n\n
          • Expedite service: 5\u20117 days possible for thick film using pre\u2011stocked blank sizes.<\/li>\n<\/ul>\n\n\n\n

            We provide rapid quoting within 24 hours after receiving your Gerber files and stack\u2011up.<\/p>\n\n\n\n

            Quality and Reliability Standards for Ceramic PCBs<\/h2>\n\n\n\n

            Do not assume all ceramic boards are \u201chigh reliable.\u201d Certification matters.<\/p>\n\n\n\n

            IPC\u20116012 Class 3 Certification<\/h3>\n\n\n\n

            We build ceramic PCBs to IPC\u20116012 Class 3 for mission\u2011critical applications. Class 3 requires 100% inspection of via cross\u2011sections after thermal shock. Our factory performs 6\u00d7 thermal shock tests from \u221265\u00b0C to +150\u00b0C and then micro\u2011section vias. We allow zero cracks or inner\u2011layer separation. Annular ring on external pads must be at least 0.050 mm.<\/p>\n\n\n\n

            Additional Tests We Perform<\/h3>\n\n\n\n
              \n
            • Solder float at 288\u00b0C for 10 seconds: no delamination, no blister.<\/li>\n\n\n\n
            • Bond pull strength >5 gf for wire\u2011bond pads.<\/li>\n\n\n\n
            • Ionic contamination <1.5 \u00b5g\/cm\u00b2 NaCl equivalent.<\/li>\n\n\n\n
            • Dielectric withstanding voltage 500 V DC for thick film, 1,500 V for co\u2011fired.<\/li>\n<\/ul>\n\n\n\n

              Our factory holds ISO 9001 and IATF 16949 certifications. We comply with RoHS and REACH directives. We use X\u2011ray inspection on every multilayer LTCC board to verify via alignment.<\/p>\n\n\n\n

              Challenges and Considerations<\/h2>\n\n\n\n

              Ceramic is not a drop\u2011in replacement. It requires thoughtful design.<\/p>\n\n\n\n

                \n
              • Brittleness:<\/strong>\u00a0Ceramic can crack under mechanical shock. Avoid cantilevered mounting. Use brackets or bond the entire board to a metal carrier.<\/li>\n\n\n\n
              • Limited board size:<\/strong>\u00a0Maximum single\u2011piece panel is about 200\u00d7200 mm due to warpage during co\u2011firing. Larger assemblies must use modular designs.<\/li>\n\n\n\n
              • Lead time for custom materials:<\/strong>\u00a0Beryllium oxide and AlN blanks sometimes have 4\u20116\u2011week lead times from the substrate manufacturer. Plan early.<\/li>\n\n\n\n
              • Soldering process:<\/strong>\u00a0Without preheat, thermal shock can crack the board. Always pre\u2011heat to within 100\u00b0C of solder melting point.<\/li>\n\n\n\n
              • Cost:<\/strong>\u00a0For consumer\u2011volume products, ceramic may be over\u2011specified. Use it only where the thermal or RF performance advantage pays back.<\/li>\n<\/ul>\n\n\n\n

                Preguntas frecuentes<\/h2>\n\n\n\n

                Can you solder to ceramic PCB?<\/h3>\n\n\n\n

                Yes. Solder adheres well to surface finishes like ENIG, silver\u2011palladium, or thick\u2011film copper. Use a rosin\u2011based flux and a controlled pre\u2011heat to avoid thermal shock. For gold\u2011paste LTCC, we plate ENIG on pads to ensure solder wets properly.<\/p>\n\n\n\n

                What is the dielectric constant of ceramic PCB?<\/h3>\n\n\n\n

                Alumina 96% has a dielectric constant of 9.4\u20119.8, AlN about 8.8, BeO 6.7. For RF designs, this higher value allows narrower traces for a given impedance compared to FR\u20114.<\/p>\n\n\n\n

                What is the maximum temperature for ceramic PCB?<\/h3>\n\n\n\n

                Alumina and AlN boards can operate continuously at 350\u00b0C. SiC boards exceed 800\u00b0C. The temperature limit usually comes from the metal paste (gold does not melt, but silver can migrate at high temp under DC bias) and any assembled components.<\/p>\n\n\n\n

                How do you cut ceramic PCB?<\/h3>\n\n\n\n

                We use laser scribing or diamond saw dicing. Manually, you can score and snap straight lines but expect rough edges. For prototypes, order boards with final outline routing done at the factory.<\/p>\n\n\n\n

                How thick is a ceramic PCB?<\/h3>\n\n\n\n

                Standard substrate thicknesses are 0.25 mm, 0.38 mm, 0.5 mm, 0.635 mm, 1.0 mm. Thicker substrates up to 2.0 mm are possible for high\u2011voltage isolation.<\/p>\n\n\n\n

                What is the price of a ceramic PCB compared to FR\u20114?<\/h3>\n\n\n\n

                A ceramic board costs 5\u201330\u00d7 more per unit area than FR\u20114, but the system\u2011level cost can be lower when you eliminate thermal management hardware and increase reliability.<\/p>\n\n\n\n

                Can ceramic PCBs have more than 2 layers?<\/h3>\n\n\n\n

                Yes. HTCC and LTCC easily support 4 to 10 layers. We embed passive components internally, which increases functional density.<\/p>\n\n\n\n

                Principales conclusiones<\/h2>\n\n\n\n
                  \n
                • Ceramic PCB substrates (alumina, AlN, etc.) conduct heat 100\u00d7 faster than FR\u20114.<\/li>\n\n\n\n
                • The low CTE matches silicon and ceramic packages, preventing solder fatigue.<\/li>\n\n\n\n
                • Choose the right manufacturing process: thick film for cost, LTCC for precision\/RF, HTCC for extreme high\u2011temp multilayer.<\/li>\n\n\n\n
                • Apply DFM rules: keep vias 2 mm from edges, use teardrops, preheat soldering.<\/li>\n\n\n\n
                • Factor total cost, not just board price; ceramic saves money on cooling and field failures.<\/li>\n\n\n\n
                • Work with a factory that provides IPC\u20116012 Class 3 certification and realistic lead times.<\/li>\n<\/ul>\n\n\n\n

                  Our team has over 15 years of ceramic PCB manufacturing experience. We support you from material selection to first article inspection. Send your design files or requirements to our engineers for a free design review and cost estimate. We deliver reliable ceramic boards that perform in the toughest environments.<\/p>","protected":false},"excerpt":{"rendered":"

                  What Is a Ceramic PCB? 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