1. Before selecting a component, consider the design scale first
Circuit board size, cost and design time, which is more important? Large size of the board is easier to design, but the production cost is higher, small size of the board production is cheaper, but may also need to be more layers and increase the price, the design may also take a long time.

2. Component size and cost
For passive components, about 0603 package size of the most cost-effective components, but also the best deal. We can handle components in the 0201 package, but not all manufacturers offer components. In addition, 0603 package is also easy to repeat the processing, if you need manual welding is no problem.

3. Look at the latest components
Some of the recent components can only be used in very small wafer sizes for BGA or QFN. Check your integrated circuit to see if you are using the specifications.

4. Confirm that the very use of components can be achieved
If the design prototype is about to complete, but need to wait for a spare parts, it is very troublesome. If your design uses rare components, you can consider alternatives that are relatively easy to obtain.

5. When designing the circuit board, pay attention to the temperature problem at the time of production
Large components and small components side by side may cause problems, large components like a radiator, may cause welding parts of the solder can not be successfully melted. When the copper plate inside the circuit board covers only a small part of the component, it may also encounter the same problem.

6. Component name and polarity markings should be particularly clear
The label of the component name is clear, and the polarity label can not be confused. LED should be particularly careful, manufacturers sometimes swap the polarity of the symbol, the positive symbol on the other LED may be the meaning of the negative. In addition, try not to mark in the vicinity of the hole or other places that may be erased.

7. Please send the design documents to prepare for production
Please confirm that the version of the design file sent is correct, the bill of materials is likely to be affected because of some outdated information, resulting in delay.

8. If you want to send it in the form of a kit, make sure that there are no missing components

Please check again and make sure that each kit has a symbol number and a name on it.

The production process is actually put a bunch of components on the board only, it sounds very simple, but the middle variable or a lot, through some confirmation process, you can make a lot of failure rate.