Influences the mechanical strength and thermal conductivity of the substrate

Determines the weight and cost of the substrate

The indoor environment has relatively low requirements for heat dissipation

Outdoor environment needs to consider factors such as wind, rain, and temperature changes

Special environments such as chemical plants may require corrosion resistance

The length and width ratio affects the stability and installation method of the substrate

Different sizes may require different support structures

High power density requires better heat dissipation design

Influences the thermal expansion and thermal stress distribution of the substrate

Vibration conditions affect the tightening of screws and the structural integrity of the substrate

The appropriate screws and spacing need to be selected to ensure long-term stable use

Suggested spacing: 80-120mm

Applicable scenarios: Small downlight/panel light

Suggested spacing: 150-200mm

Applicable scenarios: street lights/industrial and mining lights

Suggested spacing: 250-300mm

Applicable scenarios: high-power projector

Suggested spacing: 300-350mm

Applicable scenarios: Special industrial lighting

Ensure the stability and torsion resistance of the substrate during installation

Four corner fixing points help disperse stress and prevent deformation

When the length of the substrate exceeds 300mm, a fixed point should be added in the middle of the long side

Aliquot encryption helps uniformly disperse heat and mechanical stress

The COB (Chip On Board) area is a concentrated heat source area and needs special strengthening.

Encrypted fixed points can improve heat dissipation efficiency and reduce thermal stress concentration

For substrates with non-standard shapes, the fixed point layout should follow the outline shape

Contour following method helps maintain the structural integrity and aesthetics of the substrate

In vibration environments, the screw spacing should be appropriately reduced to enhance structural stability

Reducing the spacing can effectively prevent screw looseness caused by vibration

Select the appropriate screw diameter according to the substrate thickness and application scenario

M3 and M4 screws are common choices and are suitable for most lighting equipment

Pre-drilled holes ensure smooth and accurate screw installation

A slightly larger bore diameter than the screw diameter helps reduce friction during installation

Controlling the installation torque can prevent substrate damage caused by excessive screw tightness

Standard torque helps ensure screw tightening and substrate flatness

Insulating gaskets prevent short circuit risk caused by screws direct contact with substrate

Insulating gaskets are necessary safety measures especially when used outdoors

Anodizing treatment can improve corrosion resistance and weather resistance of aluminum substrates

Anodizing is a necessary surface treatment when used in harsh environments such as salt spray

Thermal warpage test is used to evaluate the deformation of the substrate under temperature changes

ΔT≤3℃ to ensure the stability of the substrate within the normal operating temperature range

Vibration test simulates vibration conditions that may be encountered during actual use

Testing to ensure the structural reliability of the substrate in vibrating environment

Tensile strength test evaluates the firmness of the fixing point

≥50N/point ensures the fixing effect of the substrate when it is subjected to external force

Cyclic aging test simulates the aging process of substrates in long-term use

200 hot and cold impact tests verify the durability and reliability of the substrate

The design of the heat dissipation structure directly affects the heat dissipation efficiency of the substrate

The substrate thickness and screw spacing need to be adjusted according to actual heat dissipation needs

Different packaging processes have different requirements for thermal management and mechanical strength of the substrate.

The impact of packaging process on substrate layout should be considered during design

The protection level determines the waterproof and dustproof capabilities of the substrate

High protection grades may require special designs to meet sealing requirements

Design verification using thermal simulation software can detect potential problems in advance

Thermal simulation helps optimize designs and reduces the number of actual tests and costs