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Ceramic Aluminum Nitride vs. PCB Board FR-4, 2 copper planes

Compare Ceramic Aluminum Nitride vs. PCB Board FR-4, 2 copper planes strength, stiffness, weight and thermal properties.

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Ceramic Aluminum NitrideSintered ceramic (pressed and fired)
PCB Board FR-4, 2 copper planesComposite
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Mechanical
Yield strengthnot sourcednot given (tensile used)
Ultimate tensile strengthnot sourced246–385MPasourcethe bare laminate's (fr4-370hr), in-plane: cross direction .. length direction (ASTM D3039)
Flexural strength310MPasource3-point bending strength (JIS R 1601)not sourced
Elongation at breaknot sourcednot sourced
Young's modulus (stiffness)320GPasourcetypical (JIS R 1602)21.9–25.8GPasourcethe bare laminate's (fr4-370hr), in-plane: cross direction .. length direction (ASTM D790-15e2); the copper planes are left out
Density3,400kg/m³sourcetypical (JIS R 1634)not sourced
Strength to weightnot sourcednot sourced
Stiffness to weight94.1MN·m/kgnot sourced
Poisson's ratio0.24sourcetypical (JIS R 1602)0.171–0.177sourcethe bare laminate's (fr4-370hr), in-plane: cross direction .. length direction
Shear modulus129GPa12.7x stiffer in shear10.2GPa
Bulk modulus205GPa12.2GPa
Speed of sound9,701m/snot sourced
Thermal
Thermal conductivity150W/m·Ksourcetypical (JIS R 1611)not sourced
Thermal expansion4.6µm/m·Ksourcemean, 40-400 °C (JIS R 1618)13–14µm/m·Ksourcethe bare laminate's (fr4-370hr), in-plane X/Y-axis, below Tg (IPC-TM-650 2.4.24C)
100 mm part over a 50 °C swing23µm growth2.93x less67.5µm growth
Specific heat710J/kg·Ksourcetypical (JIS R 1611)not sourced
Heats up and cools (diffusivity)62.1mm²/snot sourced
Thermal shock resistancenot sourcednot sourced
Values forKYOCERA AN216A dense sintered aluminium nitride, typical values; KYOCERA Fineceramics Europe data sheet 2023.04.03A whole circuit board read as one orthotropic plate: the JEDEC high-K thermal test board (JESD51-7, "2s2p"), 0.062 in (1.575 mm) thick with two internal solid copper planes 0.0014 in (1 oz) thick, as Texas Instruments SZZA017A Table 1 gives it. Copper C110 and the Isola 370HR laminate from this library; the layers conduct in parallel along the board and in series through it (boardStackup.ts). Its two 0.0028 in trace layers cover little of the board and are left out; vias are ignored. Mechanical values are the bare laminate's.

Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

Questions

Which is stiffer, Ceramic Aluminum Nitride or PCB Board FR-4, 2 copper planes?

Ceramic Aluminum Nitride is stiffer: Young's modulus 320 GPa against 23.9 GPa for PCB Board FR-4, 2 copper planes, so the same part in Ceramic Aluminum Nitride deflects less under the same load.

Which expands less with temperature?

Ceramic Aluminum Nitride expands less: 4.6 µm/m·K against 13.5 µm/m·K for PCB Board FR-4, 2 copper planes.

Among 73 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelPCB Laminate FR-4SiliconCeramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Ceramic Aluminum Nitride
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLA Resin Elastic 50ASLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrickPCB Laminate FR-4SiliconCeramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30
Strength against density

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