Introduction To Distinguish Good And Bad PCB Circuit Board

Judging from appearance

1，Appearance of weld

Because there are many PCB circuit board parts, if the welding is not good, the circuit board parts will fall off easily, seriously affecting the welding quality and appearance of the circuit board, so it is very important to weld firmly.

2，Standard rules for dimensions and thickness

As PCB has different thicknesses of a standard circuit board, users can measure and check according to their own requirements.

3，Light and color

Usually, the external PCB circuit board has an ink covering to act as insulation. If the color of the board is not bright, less ink will indicate that the insulation board itself is not good.

Judge from plank

1, ordinary HB board is cheap, easy to deformation and fracture, can only do a single panel, the component surface color is deep yellow, with stimulating smell, copper-coated rough, thin.

2, Single-sided 94V0, CEM-1 board, the price is relatively higher than cardboard, the component surface color is light yellow, mainly used for fire rating requirements of the industrial board and power board.

3FR4 board has a high cost, good strength, and green double-sided appearance. Basically, most PCB circuit boards are made of this material, and copper coating can be very precise and fine, but relatively speaking, unit board is also heavy.PCB circuit board no matter what color printing ink to be smooth, no false wire dew copper and bubbling phenomenon.

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