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What are the technical requirements for copper clad laminate press manufacturers?


Release time:

2021-07-02

What are the technical requirements for copper clad laminate press manufacturers? In recent years, with the development of electronic technology, the epoxy resin used in epoxy copper clad laminate has put forward more update requirements, mainly in the following aspects: What is the high glass transition temperature produced by the copper clad laminate press manufacturer?

What are the technical requirements for copper clad laminate press manufacturers?

Copper Clad Laminate Press ManufacturerofTechnical RequirementsWhat is it?

In recent years, with the development of electronic technology, the epoxy resin used in epoxy copper clad laminate has put forward more update requirements, mainly in the following aspects:

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Copper Clad Laminate Press ManufacturerofHigh glass transition temperatureWhat is it?

  TgIt reflects the physical changes of the epoxy resin gas as the temperature rises. At room temperature, the gas is in a hard "glass state". After the temperature rises to a certain area, the gas changes from the "glass state" to the "high elastic state". This temperature is called the glass temperature of the gas.(Tg). that is to say,Tgis the highest temperature at which the gas remains rigid(). in the matrixTgdepends on the resin used. traditionalFR-4Copper plate is a brominated bisphenol with heteroaType epoxy resin,Tgusually in130Left and right. In order to improve the gasTgAt present, most of the industry uses epoxy resin. Epoxy structure containing2More than one epoxy, high cargo cross density,Tgincreased accordingly. The heat resistance, fire resistance and dimensional stability of the gas have been improved accordingly.

Epoxy resin, the structure contains poly epoxy resin, can significantly improve the heat resistance of the gas and other properties. But the product is brittle, poor adhesion. Epoxy resin copper foil laminate production is generally not used alone, and bisphenolaType epoxy resin used together. The amount of epoxy resin used is generally the total amount of epoxy resin.20%To30%. It turns out that the use of bisphenol in epoxyaEpoxy resin can obtain better comprehensive effect.

Copper Clad Laminate Press Manufacturer Blocks Ultraviolet(UV)and automatic optical inspection(AOI)FunctionWhat is it?

  (1)WithUVBlocking the rapid development of the electronic industry, the printed circuit has high precision and high density. In the manufacturing process of double-sided printing plates and multi-layer printing plates, the liquid photosensitive flux and the new process of exposing both sides at the same time are widely used. Ultraviolet(UV)It can penetrate the substrate, so the line patterns on both sides interfere with each other, creating ghosts, resulting in waste products. In order to prevent ghosting, gas epoxy resin must have sunscreen function. At present, the industry generally believes that in the epoxy resin system to join4functional epoxy resin orUVAbsorber, with fluorescent chromophore properties, absorbingUVLight has a blocking effect.

  1995In, our country successfully developed blocking.UVandAOIfunctional epoxy resin copper foil laminates, while also developing the corresponding inspection methods and testing instruments. This method of inspection was used by the International Electrical Engineering Commission.(IEC)Confirmed as standard numberIEC1189-2C11。它由UVTransmittance detector,UVLight source andUVLight quantity meter composition. correspondingUVThe transmittance was calculated by measuring the light energy with a light quantity meter having the sample-free and sample conditions, respectively.(2) AoiFunction in the printed circuit board quality inspection work production expansion, route intensive, resulting in the traditional manual inspection method can not be used. At present, some large enterprises widely use automatic optical inspection(AOI)of new technologies. The epoxy resin on the substrate must haveAOIfunction.AOIInstrument County uses a plutonium laser as a light source. The epoxy resin on the substrate needs to absorb the plutonium laser, generate low-energy fluorescence, measure the fluorescence on the substrate, and realize the automatic optical inspection of the appearance defects of the printed circuit board.


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