Layout draft of printed circuit board can describe the final drawing of each components and layout design of interconnected circuit, it can also provide sufficient information for the final prototype drawing. Moreover, layout draft also include component hole, wire width and space.

Before designer begin to make out plan for printed circuit board layout draft, we suggest to prepare a trial draft, also takes below factors into consideration:

1>    Size of printed circuit board—depends on the space of equipment or use standard size;

2>    Profile of component—attain from data handbook;

3>    Installation datasheet of component—if install professional version, need to take data handbook as reference, if has thermal limitation need to use heat-sink or high volume capacitor;

4>    Interconnect graphics;

5>    Width and space of wire—it depends on the functional requirement of wire;

6>    Edge line—Normally will leave 0.5cm for each edge;

7>    Connector—Size and type of connector depends on the outer connection, such as power input and output signal, grounding and device requirement.

8>    Fixing gadget—screw and clip;

Layout design is always a process of experiment and error-checking, before the final result come out, it need to modify and adjust again and again.

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