1. Gerber file or PCB PCB CAD file

Gerber file is the most basic PCB circuit board manufacturing file. When PCB PCB factory receives Gerber document and imports CAM software, it can provide data for each PCB circuit manufacturing process. Gerber data can also be Providing image data for a specific device, such as an AOI, can also be used as a basis for defining the aperture of a PCB circuit board.

2.fab drawing (manufacturing standards)

This specification generally requires PCB circuit board manufacturers to complete a circuit board, so the above will usually contain the following information, circuit board assembly plant in the feed inspection will usually use this specification as a test basis:

Insulation printing ink color. Generally green, but also black and red.

Screen printing ink color. Generally white, but also yellow, other colors are rare.

Printed circuit board final surface treatment (Surface Finished), such as ENIG, HASL, OSP ... and so on. Some ENIGs also specify the thicknesses of the gold and nickel layers, and some even specify the thickness of the copper foil.

Substrate grade of the circuit board. Now the circuit board is divided into lead and lead-free process, lead-free process temperature is relatively high, if necessary, the best provisions of the FR4 substrate Tg (lead-free 150C above), Td value (lead-free 325C ), Z-axis expansion coefficient (300ppm / degree or less).

Copper foil electrical characteristics. Especially high-frequency products.

V-cut and additional machining or drilling information.

Puzzle style and size.

3. Panel drawing (puzzle / board specifications)

The above Gerber document only defines the data of a single PCB board, but the general board in order to improve the efficiency of the use of circuit boards and manufacturing plants, circuit boards are actually produced when the puzzle / board design, puzzle Shape, style and size will affect the design of the following governance tools, Shanghai electronic products processing different puzzle way or even cause the original governance tools can not be used:

Stencil

Vacuum block

Visual inspection template

MDA (Manufacturing Defect Analyzer) or ICT (In-Circuit Tester) test fixture

FVT (Function Verification Tester, function test fixture)

In different production lines and different factory transfer, remember to follow the original puzzle style, if the original file does not define the puzzle style, you can find the original circuit board manufacturer to obtain, and then to regulate.