Manufacturing method of metal-based circuit board of LED

Abstract

The invention relates to a manufacturing method of a metal-based circuit board of an LED. A finished product is obtained through a metal plate surface treatment step, a heat-conducting insulating film superimposing step, a combined copper foil laminating step, a cutting step, a location hole drilling step, a pretreatment step, a circuit diagram forming step, an etching and stripping step, a solder resist white oil coating step, an exposure step, a developing step, a character printing and solidifying step, a punching step, a v cutting step and an anti-oxidation process. PP glue is combined on a metal-based base plate; and a printing technology or an exposure technology is adopted for circuit diagram forming. Through the technical scheme provided by the invention, the metal-based circuit board integrating a drive power supply and a light source can be massively produced; and the manufactured LED and power supply have good heat dissipation performance.

Description

technical field [0001] The invention relates to the field of LED optoelectronic technology, in particular to a method for manufacturing an LED metal-based circuit board. Background technique [0002] LED lighting fixtures, because the lamp beads will generate heat during the working process, therefore, it is necessary to use a metal-based circuit board with good heat dissipation and heat resistance as the carrier of the LED lamp beads; at the same time, the lamp beads of the LED lamps are in the form of a patch Welding, and the components of the driving power supply need to be welded in the form of plug-ins. Therefore, the driving power and light source of the LED lamp can only be manufactured separately and used in connection, which brings a lot of trouble to production and life, and the material and manufacturing costs are also relatively high. higher. In order to pursue lightness and convenience, people expect to integrate the power drive and light source of the LED illu...

AI Technical Summary

Problems solved by technology

[0003] At present, there are still two researches on the integration of the power drive part and the light source. One of the methods is to place the drive power part in the LED light source circuit directly on the aluminum-based circuit board in the form of a patch, and use AC-AC Driven by this method, the LED lamps made in this way often produce flickering phenomena, and are affected by factors such as the surge of the grid line, the driver chip is easily damaged, and the stability of the LED lamp is seriously affected; another method is Use the milled (or punched) FR4, CEM-1 or CEM-3 board as the substrate, inlay it on the pre-milled (or punched) aluminum plate of the same size, then coat the insulating layer and cover with copper The foil plate is pressed together, and then the circuit board is processed and produced to make an electric light source integrated LED lamp. The disadvantage of this method is that the material cost and processing cost are doubled, and the production efficiency is very low. It can only be manufactured in small quantities and cannot be mass-produced. ; and when pressing, due to the thickness error generated when the power base material and the aluminum plate itself are cut, the error that occurs when the substrate is embedded on the aluminum plate, and the dust generated during punching, these factors will seriously affect the production. The combination of insulating layer with copper foil and aluminum plate will ultimately affect the technical quality indicators such as peel strength, insulation and thermal conductivity of the product

[0004] The above two methods also have the following deficiencies in a single step: mainly referring to the gluing step, the traditional method adopts three methods of roller coating, printing and spray coating, and these three methods have the following shortcomings respectively: 1. roller coating, glue coating The thickness is difficult to adjust, the thickness is uneven, and the production speed is slow, generally around 3-4m / min; ②Printing, low efficiency, slow speed, small product size, generally the product width is below 60cm, and cannot produce a size of 1m*2m Such large-sized aluminum-based copper-clad laminates; ③Spray coating, although the product can be sprayed evenly, and large-sized boards can also be produced, but because the sprayed insulating glue is in the form of mist, a large amount of colloidal substances float into the air, except Seriously affect the environment and have health effects on the surrounding operators, but also waste a lot of raw materials and increase production costs

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