Some companies calculate a pad as a point, but there are two solder joints as a point. The pad calculation, for example, is to calculate the number of pads on the PCBA board, but some special components, such as inductors, large capacitors, integrated circuits, etc., need to calculate the power rating.
Soldering point unit price:
Currently on the market, the soldering point unit price varies from 0.008 ~ 0.03 yuan / soldering point price are available, this depends on the following conditions:
One, the process
1, leaded process is relatively inexpensive;
2, the lead-free process is relatively high;
3, the red rubber SMT chip Processing is relatively simple;
4, tin paste red rubber dual process is relatively troublesome.
Two, the number of
1, the common SMT SMD prototype processing less, only a few pieces to dozens of pieces of the number of pieces, which will be charged according to the minimum consumption of processing costs, will not be calculated according to the number of points;
2, small batch of SMT SMD processing production of less than 1,000 pieces, it will be calculated in accordance with the engineering fee and the number of points in conjunction with the calculation;
3, the large quantity of SMT SMD processing, calculated by counting the number of points multiplied by the unit price.
Three, the degree of difficulty
1, according to the single and double-sided classification, single-sided cheap, double-sided a little more expensive;
2, according to the precision points, the more precise SMT chip processing, such as BGA will be a little more expensive;
3, according to the density of the patch components points.
Four, sampling
SMT chip processing order a piece of 100 pieces within the SMT chip sampling order, the board's degree of difficulty, the time to do the program, the time on the machine to turn the line is different, charging from 800 yuan to 3,000 yuan ranging from the engineering fee.
Five, stencil
Based on the size of the PCB board, open different types of stencils. According to the precision of the chip on the PCBA board, choose to open electropolished stencil or ordinary stencil. The cost of different stencil model category stencil is about 120~350. Of course, customers can also provide their own stencil.