Overview of LED aluminum base board knowledge introduction

LED aluminum base board is PCB, which is also the meaning of printed circuit board. The circuit board used in LED lamps is usually aluminum base plate, which can heat and heat quickly, other equipment or electric circuit board or glass fiber board. LED PCB manufacturers can use aluminum substrate because of high thermal conductivity, good heat dissipation and effective internal heat transfer. The aluminum substrate is a unique metal coated copper plate with good thermal conductivity, electrical insulation performance and mechanical machining properties. As far as possible, the PCB is close to the aluminum base, so as to reduce the thermal resistance of the adhesive.

The structure of the aluminum substrate

The aluminum base copperplate is a kind of metal circuit board material composed of copper foil, thermal insulation layer and metal substrate. Its structure is divided into three layers:

Cireuitl.Layer line Layer: copper clad plate equivalent to common PCB, and the thickness of copper foil is loz to 10oz.

DiELcctricLayer insulation layer: insulation layer is a low thermal conductive thermal insulation material.

BaseLayer base: metal substrate, usually aluminum or copper. Aluminum base coated copper plate and traditional epoxy glass cloth laminate.

Circuit layer (that is, the copper foil) usually formed after etching printed circuit, the component parts of the mutual connection, under normal circumstances, the circuit layer with a lot of current-carrying capacity, thus should use thicker copper foil, generally 35 microns - 280 microns thick; Thermal insulation is aluminum plate core technology, it is usually made up of special ceramics fill special polymer, small heat resistance, excellent viscoelasticity can, has the ability of thermal aging, able to withstand mechanical and thermal stress.

The thermal insulation layer of high performance aluminum substrate is used to make it have excellent thermal conductivity and high strength electrical insulation performance. Metal base is aluminum plate support components, requires high heat conductivity, generally is aluminum plate, also can use copper (copper plate can provide better thermal conductivity), suitable for drilling, punching and shearing and cutting and other conventional mechanical processing. PCB materials have the advantages of other materials incomparable. Suitable for SMT on the surface of power components. Without radiator, the volume is greatly reduced, heat dissipation is excellent, good insulation and mechanical properties.

The characteristics of the aluminum substrate

1. Adopt surface mount technology (SMT);

2. Reduce the volume of products and reduce hardware and assembly costs;

3. Replace fragile ceramic substrate to obtain better mechanical endurance.

4. Effective treatment of thermal diffusion in circuit design scheme;

5. Reduce product operation temperature, improve product power density and reliability, and extend the service life of products;