Everyone in orders, process engineering and production process data types, often found that some customers PCB design does not meet the requirements of the feasibility of the production process. Of course, this does not mean that a limited level designers to die, but because most designers do not have to understand the PCB factory, do not know a qualified PCB board is how to produce out of PCB production know very little, which is designed lead the board is no way to processing and production or cause of the problem appears in the production process, so I hope the following can help in PCB design engineer.

Detailed design parameters:

一First, the line

1. The minimum line width: 6mil (0.153mm). That is, if the line width is less than 6mil will not be produced, (the minimum line width from the inner plywood is 8MIL) if conditions permit design, design bigger the better, since a large width, the better the production plant, the higher yield generally conventional design around 10mil, this point is very important, the design must consider.

2. Minimum line spacing: 6mil (0.153mm). . Min.Trace.Spacing is the line-to-line, line-to-pad distance not less than 6mil from the production point of view, the bigger the better, in general routine 10mil, of course, under the design conditions, the bigger the better this is very important, design We have to consider.

3. line to the contour line spacing 0.508mm (20mil)

二 via vias (contact hole is commonly known)

1. Minimum aperture: 0.3mm (12mil)

2. Minimum vias (VIA) pore size of not less than 0.3mm (12mil), the pads can not be less than unilateral 6mil (0.153mm), preferably more than 8mil (0.2mm) is not limited to large, this is very important, we must design consider.

3. vias (VIA) hole to hole spacing (hole edge to hole edge) is not less than 6mil, preferably greater than 8mil. This point is very important, the design must consider.

4. pads to the contour line spacing 0.508mm (20mil)

三 PAD pad (which is commonly known plug-hole (PTH))

1. Plug-hole components depending on the size you to decide, but it must be greater than your pin components, we recommend a minimum of 0.2mm or more greater than 0.6 means that the components of the pin, you have a minimum of 0.8 is designed to prevent processing tolerances cause difficulty inserted.

2. Plug-hole (PTH) unilateral outer pads not be less than 0.2mm (8mil) the bigger the better, of course, this point is very important, the design must consider

3. Plug-hole (PTH) hole to hole spacing (hole edge to hole edge) is not less than: 0.3mm bigger the better, of course, this point is very important, the design must consider

4. pads to the contour line spacing 0.508mm (20mil)

四 solder

Plug-hole window, SMD unilateral windows can not be less than 0.1mm (4mil)

五 characters

Character design of a direct impact on production, the characters are clear with the character design is very relationship

A character width can not be less than 0.153mm (6mil), character height can not be less than 0.811mm (32mil), the ratio of height to width ratio is preferably 5 for the relationship to say, word width 0.2mm character height of 1mm, in order to push the class.

六 non-metallized slots

Slots minimum spacing is not less than 1.6mm or will greatly increase the difficulty of milling

七 panel board

1.panel board,it have gap panel board and Gapless panel board, for gap panel board,gap not less than 1.6 (thickness 1.6) mm or will greatly increase the difficulty of the puzzle plate edge milling work depending on the size of the device is not the same is not the case, gapless the gap is about 0.5mm edge technology is generally 5mm

2. Panel board V-cut direction must be greater than 8cm, will fall inside the machine because when less than 8cm V-cut, V-cut width must be less than 32cm, a width greater than this will not fit into the V-cut machine, this point restrictions due to the production process, is not we can not do it.

3. V cut can only walk a straight line, because the board outline reasons, it could not walk a straight line can be added to make the pitch stamp Span Bridge connection, the relevant considerations