Surrounding dam metal ceramic circuit board PCB
- ✅ High airtightness: Metal dam sealed cavity, protecting chips and extending their lifespan (essential for military/aerospace industries). - ✅ Super heat dissipation: Ceramic thermal conductivity is 100 times that of FR-4, suitable for high-power LED, laser, IGBT modules. - ✅ High reliability and stability: Low thermal expansion coefficient (CTE ≈ 4-7 ppm/℃), matched with silicon chips, resistant to thermal shock and high and low temperatures. ✅ ** Large scale mass production: Chaosheng has a unique 3m × 1.24m production line that can produce ≥ 500 pieces per month, replacing multi board splicing and improving system stability.
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Product Description
Surrounding Dam Metal Ceramic PCB
The enclosed metal ceramic circuit board, also known as the enclosed ceramic PCB, is a high-performance packaging substrate that integrates a metal enclosed dam (sealing ring) on a ceramic substrate (such as alumina/aluminum nitride). Its core applications include airtight packaging, high-power heat dissipation, and high-frequency high reliability scenarios. China Chaosheng Electronics can achieve customized and mass production of ultra large sizes (including 3m × 1.24m).
1、 Structural definition (Surrounding Dam)
Ceramic substrate * *: Al ₂ O ∝ (alumina), AlN (aluminum nitride, high thermal conductivity), Si ∝ N ₄ (silicon nitride), providing insulation, heat dissipation, and mechanical support.
-Metal Surrounding Dam: A metal sealing ring (copper/nickel/gold) located at the edge of the substrate/chip area, with a height of 0.5-5mm, forming a cavity for airtight packaging of the chip (vacuum/protective gas) to isolate oxygen, moisture, and dust.
-* * Metal circuit layer * *: DPC/AMB/DBC process, copper directly bonded/electroplated on ceramics, circuit accuracy ± 25 μ m, suitable for high-frequency/high-speed signals.
2、 Core Process (Super Sheng Technology Capability)
1. * * Ceramic substrate manufacturing process**
-Oversized size: maximum * * 3m * 1.24m * *, flatness ≤ 0.5mm/㎡, solves the problem of warping and deformation of large board surfaces.
-Material: 96%/99% Al ₂ O ∝, AlN (thermal conductivity 180-220W/m · K), suitable for extreme environments ranging from -40 ℃ to 125 ℃.
2. * * Dam construction (key)**
-Integrated molding: Ceramic and metal dam * * co fired/electroplated bonding * *, no bonding layer, air tightness ≤ 1 × 10 ⁻⁹ Pa · m ³/s.
-Dam parameters: width 0.8-3mm, height 1-3mm, top can be used as a positioning step, suitable for glass/metal cover plate packaging.
3. Line and online AOI detection**
-Line width/spacing 25 μ m, aperture 0.1mm, impedance control ± 5%.
-Online AOI: Customized 3m × 1.24m ultra large stroke equipment, 100% full inspection of open circuit/short circuit/solder pad defects, * * defect detection rate>99.5% * *, AI real-time marking, MES traceability.
3、 Core advantages
- ✅ High airtightness: Metal dam sealed cavity, protecting chips and extending their lifespan (essential for military/aerospace industries).
- ✅ Super heat dissipation: Ceramic thermal conductivity is 100 times that of FR-4, suitable for high-power LED, laser, IGBT modules.
- ✅ High reliability and stability: Low thermal expansion coefficient (CTE ≈ 4-7 ppm/℃), matched with silicon chips, resistant to thermal shock and high and low temperatures.
✅ ** Large scale mass production: Chaosheng has a unique 3m × 1.24m production line that can produce ≥ 500 pieces per month, replacing multi board splicing and improving system stability.
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