The comparison of different welding methods
| Fin/Absorber Structure & Item |
Fusion Bonding Type | Package Ultrasonic Welding Type | Laser Welding Type | Normal Ultrasonic Welding Type |
| Photos |   |
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| Base Material With Coating | Anodic Oxidation ： Fusion Bonding Alumnium Strip + Copper Tube (riser) |
Anodic Oxidation : Alumnium Strip + "U"shape Aluminum Strip + Copper Tube (riser) |
Blue Selective : Full Copper Plate + Copper Tube (riser) |
Anodic Oxidation: Aluminum Strip + Copper Tube (riser) |
| Black Chrome / Blue Selective ： Full Aluminum Plate + "U"shape Aluminum Strip + Copper Tube (riser) |
Black Chrome : Copper Strip+ Copper Tube (riser) |
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| Structure | Fusion Bonding for two pieces of Alumnium Strip and Alumnium tube , then blowing up Alumium tube. |
Using "U"shape Aluminum Strip to pack Copper Tube (riser) , then Ultrasonic Welding "U"shape Aluminum Strip and Strip/Plate. |
Laser Welding between Full Copper Plate and Copper Tube (riser) directly |
Normal Ultrasonic welding between Strip and Copper Tube (riser) directly |
| Structure Stability | Insert Riser Tube inside fusion bonding Strip and pressure tightly , More stronger for the structure. |
Same material welding together , more stronger for the structure. |
Normal , Only the welding points between Strip and Copper Tube (riser) . |
Normal .Only about 2-3mm welding line between Strip and Copper Tube (riser) . A little damage for the fin surface . |
| Conductive Surface | 360° Heat Exchange | 360° Heat Exchange | Only welding points for heat exchange . | Only 3-4mm width welding line for heat exchange . |
| Thermal Efficiency | Higher | High | Normal | Normal |
