PCB Tech - How is the SMT patch processing cost quotation calculated?

How is the SMT patch processing cost quotation calculated?

This article is the calculation method of SMT processing price shared by PCBA chip processing plants to everyone

The importance of SMT chip processing in the smt processing industry is irreplaceable. Many companies and R&D groups that must produce electronic devices are not familiar with SMT processing costs. How to calculate the SMT processing costs What about? How does this price come from? This will make many friends who don't know PCBA patch processing plants feel like a cloud. In fact, the stage of SMT processing is relatively complicated, and the latest quotation will be affected by a variety of factors. The following PCBA chip processing factory will tell you the calculation method of SMT processing price.

Some companies count one pad as one point, but there are two solder joints as one point.

Taking the pad calculation as an example, it is to calculate the total number of pads on the PCBA board, but some special components, such as inductors, large capacitors, integrated circuits, etc., must be calculated for rated power.

Unit price of solder joints:

Currently on the market, the unit price of solder joints varies from 0.008 to 0.03 yuan per solder joint. The key lies in the following factors:

1. Process

1. The leaded process is relatively cheap;

2. The lead-free process is relatively high;

3. The processing of red glue SMT patch is relatively simple;

4. The dual process of solder paste and red glue is relatively troublesome.

2. Total

1. The total amount of common SMT patch proofing and processing is small, as long as the total amount of a few pieces to dozens of pieces, this will be charged at the lowest consumption to replace the cost of processing, and will not be calculated by points;

2. Small batches of SMT chip production and processing will be calculated according to the combination of engineering costs and points;

3. Mass SMT patch processing on behalf of processing, calculated by the number of points * unit price.

3. Degree of difficulty

1. According to single-sided classification, single-sided cheaper, double-sided slightly more expensive;

2. According to the degree of precision, the more precise SMT patch processing, such as BGA, will be slightly more expensive;

3. According to the density of SMD components.

Four, proofing

SMT patch processing order is a proofing order for SMT patch within 100 pieces, the degree of difficulty of the board, the time of the program, the time of on-board transfer are different, and the charge ranges from 800 yuan to 3,000 yuan. fee.

Five, steel mesh

According to the size of the PCB board, open stencils of different specifications. According to the precision of the chip on the PCBA board, choose to turn on the electro-polished steel mesh or the ordinary steel mesh. The cost of different stencil specifications and types of stencils is about 120-350. Of course, customers can also provide their own steel mesh.