This product is a high-performance 3.5mm x 3.5mm 3D Aluminum Nitride (AlN) ceramic packaging substrate, specifically engineered as a UVA Flip-Chip Mounting Solution. Utilizing advanced Direct Plated Copper (DPC) technology with an integrated dam structure, it is designed to address the critical thermal management and reliability challenges of high-power UVA LED flip-chip packaging. This substrate enables superior heat dissipation, robust electrical interconnection, and precise phosphor containment, making it the ideal foundation for next-generation, high-power-density UVA emission systems.
The core material is Aluminum Nitride (AlN) with a high thermal conductivity (170-200 W/mK), providing the most efficient thermal path for heat generated by the UVA flip-chip, directly drawing it away from the active layer.
The flip-chip design eliminates thermal interface materials like solder paste, further reducing the overall thermal resistance.
Fine-Pitch Circuitry: The DPC process enables high-precision circuits with excellent line width/spacing, perfect for the tight pad pitches of flip-chip LEDs.
Integrated Dam Structure: The monolithic 3D dam creates a precise cavity for phosphor coating, ensuring uniform color conversion, improving light output quality, and preventing silicone overflow onto electrical contacts.
Wire-Free Design: As a flip-chip substrate, it eliminates failure points associated with gold wire bonding, such as breakage and disconnection, offering exceptional resistance to thermal cycling and mechanical shock.
Matched CTE: The CTE of AlN closely matches that of semiconductor materials (GaN, Si), minimizing thermal stress and preventing delamination or cracking during operation.
The compact 3.5mm x 3.5mm footprint allows for ultra-high packaging density, enabling the development of smaller, more powerful UVA emitter arrays.
The 2-layer design provides flexible routing for anode/cathode separation, improving electrical performance.
This substrate is ideal for applications requiring robust, high-power UVA point sources:
UV Curing Systems: High-power spot curing heads for adhesives, inks, and coatings in electronics manufacturing.
Medical and Biotech Equipment: As a light source module in medical diagnostic devices and phototherapy systems.
Water and Air Purification: Compact, high-irradiance UVA sources for purification devices.
High-Reliability Automotive Sensing: UVA light sources for sensors requiring long-term stability.
Scientific Instrumentation: As a stable UVA excitation source in analytical equipment.
Q1: Why is a DPC-based AlN substrate superior to a standard MCPCB for this UVA flip-chip application?
A1: Standard Metal Core PCBs have much lower thermal conductivity (1-8 W/mK) and poor CTE mismatch, leading to high thermal resistance and reliability risks under high power. Our DPC AlN substrate offers an order-of-magnitude better thermal performance and a matched CTE, which is critical for managing the high heat flux of a flip-chip UVA LED in a compact size.
Q2: How does the "3D" dam structure benefit a flip-chip design compared to a flat substrate?
A2: In a flip-chip design, the electrical contacts are on the bottom. A flat substrate would allow phosphor/silicone to flow and short these contacts. The 3D dam contains the phosphor precisely over the chip, protecting the electrical interconnects and ensuring consistent optical performance.
Q3: What is the typical thermal resistance of this substrate?
A3: The thermal resistance is extremely low due to the combination of AlN and the direct-bonded copper. A specific value depends on the final package design, but it is typically in the range of a few degrees Celsius per watt for a package of this size, significantly outperforming other solutions.
Q4: Can you provide substrates with different dam heights or cavity sizes?
A4: Absolutely. The dam dimensions and cavity size are customizable to accommodate different chip sizes, phosphor thickness requirements, and desired optical profiles. Please consult with our engineering team for your specific needs.
Q5: Is this substrate compatible with eutectic die-attach or silver sintering processes?
A5: Yes. The DPC process creates a very smooth and planar copper surface, which is ideal for high-reliability die-attach methods like eutectic soldering (e.g., AuSn) or silver sintering, further enhancing the thermal and mechanical performance of the final package.
This product is a high-performance 3.5mm x 3.5mm 3D Aluminum Nitride (AlN) ceramic packaging substrate, specifically engineered as a UVA Flip-Chip Mounting Solution. Utilizing advanced Direct Plated Copper (DPC) technology with an integrated dam structure, it is designed to address the critical thermal management and reliability challenges of high-power UVA LED flip-chip packaging. This substrate enables superior heat dissipation, robust electrical interconnection, and precise phosphor containment, making it the ideal foundation for next-generation, high-power-density UVA emission systems.
The core material is Aluminum Nitride (AlN) with a high thermal conductivity (170-200 W/mK), providing the most efficient thermal path for heat generated by the UVA flip-chip, directly drawing it away from the active layer.
The flip-chip design eliminates thermal interface materials like solder paste, further reducing the overall thermal resistance.
Fine-Pitch Circuitry: The DPC process enables high-precision circuits with excellent line width/spacing, perfect for the tight pad pitches of flip-chip LEDs.
Integrated Dam Structure: The monolithic 3D dam creates a precise cavity for phosphor coating, ensuring uniform color conversion, improving light output quality, and preventing silicone overflow onto electrical contacts.
Wire-Free Design: As a flip-chip substrate, it eliminates failure points associated with gold wire bonding, such as breakage and disconnection, offering exceptional resistance to thermal cycling and mechanical shock.
Matched CTE: The CTE of AlN closely matches that of semiconductor materials (GaN, Si), minimizing thermal stress and preventing delamination or cracking during operation.
The compact 3.5mm x 3.5mm footprint allows for ultra-high packaging density, enabling the development of smaller, more powerful UVA emitter arrays.
The 2-layer design provides flexible routing for anode/cathode separation, improving electrical performance.
This substrate is ideal for applications requiring robust, high-power UVA point sources:
UV Curing Systems: High-power spot curing heads for adhesives, inks, and coatings in electronics manufacturing.
Medical and Biotech Equipment: As a light source module in medical diagnostic devices and phototherapy systems.
Water and Air Purification: Compact, high-irradiance UVA sources for purification devices.
High-Reliability Automotive Sensing: UVA light sources for sensors requiring long-term stability.
Scientific Instrumentation: As a stable UVA excitation source in analytical equipment.
Q1: Why is a DPC-based AlN substrate superior to a standard MCPCB for this UVA flip-chip application?
A1: Standard Metal Core PCBs have much lower thermal conductivity (1-8 W/mK) and poor CTE mismatch, leading to high thermal resistance and reliability risks under high power. Our DPC AlN substrate offers an order-of-magnitude better thermal performance and a matched CTE, which is critical for managing the high heat flux of a flip-chip UVA LED in a compact size.
Q2: How does the "3D" dam structure benefit a flip-chip design compared to a flat substrate?
A2: In a flip-chip design, the electrical contacts are on the bottom. A flat substrate would allow phosphor/silicone to flow and short these contacts. The 3D dam contains the phosphor precisely over the chip, protecting the electrical interconnects and ensuring consistent optical performance.
Q3: What is the typical thermal resistance of this substrate?
A3: The thermal resistance is extremely low due to the combination of AlN and the direct-bonded copper. A specific value depends on the final package design, but it is typically in the range of a few degrees Celsius per watt for a package of this size, significantly outperforming other solutions.
Q4: Can you provide substrates with different dam heights or cavity sizes?
A4: Absolutely. The dam dimensions and cavity size are customizable to accommodate different chip sizes, phosphor thickness requirements, and desired optical profiles. Please consult with our engineering team for your specific needs.
Q5: Is this substrate compatible with eutectic die-attach or silver sintering processes?
A5: Yes. The DPC process creates a very smooth and planar copper surface, which is ideal for high-reliability die-attach methods like eutectic soldering (e.g., AuSn) or silver sintering, further enhancing the thermal and mechanical performance of the final package.
