Q:What is the tolerance range of the size of the copper foil of the PCB board?

Copper clad laminate national standard: GB4723~4725 "printed circuit copper clad laminate", as a result of years of revision, the standard thickness of the copper clad plate, single point deviation requirements are relatively loose.

Q:Why do you need UL certification?

Products into the United States, customs and also to carry out UL security certification inspection.

Q:What is the raw material of FPC?

1, flexible circuit board (flexible printed circuit board) flexible circuit board (flexible printed board): English Flexible Printed Circuit, abbreviation FPC, commonly known as soft board. The definition of flexible circuit board IPC-T-50 is a printed circuit board substrate using flexible single-layer, double-layer or multilayer production line, can have a covering layer (solder layer), also can not cover layer (solder layer). GB GB/T2036-94 "printed circuit terminology" 2.11 on flexible printed board (FPC) is explained: the use of flexible substrate made of printed boards, with or without flexible cover.

Q:Is the circuit board poisonous?

The name of the circuit board are: circuit board, PCB board, aluminum substrate, high frequency board, PCB, ultrathin circuit board, ultrathin circuit board, printed circuit board, printed circuit board, Kunshan circuit board, etc. all of the circuit board

Q:Structure of flexible circuit board

In accordance with the number of layers of copper foil, divided into single board, double layer board, multilayer board, double-sided board, etc.. The structure of the single layer board: the structure of the flexible plate is the most simple structure of the flexible plate. Usually substrate + transparent glue + copper foil is a set of raw materials to buy, protective film + transparent plastic is another kind of raw materials to buy. First of all, copper foil etching process to get the required circuit, the protective film to be drilled to expose the corresponding pad.

Q:We usually see the circuit board has a layer of green things, that is, why should be painted with green things?

General printed board substrate materials can be divided into two categories: rigid substrate materials and flexible substrate materials. General rigid substrate material is an important variety of copper clad laminate. It is used for reinforcing material (Reinforeing Material), impregnated with resin adhesive by drying, cutting, laminating blank, and then covered with copper foil, as die steel, in the hot press with high temperature and high pressure forming process and made. Generally used in the semi - thick plate, is the copper clad plate in the production process of semi-finished products (mostly glass cloth impregnated with resin, after drying).

Q:What can be used in the print output system for printed board production?

PCB (Printed Circuit Board), the Chinese name for printed circuit boards, referred to as printed circuit boards, is one of the important components of the electronics industry.

Q:What is the cost standard of circuit board?

The free testing of industrial products.

Q:What's the difference between PCB and FPC?

PCB (PrintedCircuitBoard), Chinese name for the printed circuit board, and the printed circuit board, printed circuit board, is an important electronic components, electronic components supporting body, is the electrical connection of electronic components provider. Because it is made of electronic printing, it is called "printed" circuit board.

Q:Why does the FPC circuit board have positive and negative layers?

Positive layer is the data above the line and the actual line of the same; negative layer is the data line and the actual opposite.