Tag Archives: methods

Methods of saving PCB cost

In order to let the cost of PCB can be as low as possible, there are many factors that must be taken into account:

1. The size of the board is most important. The smaller board, the lower the cost. Part of the PCB has become the standard size, as long as the cost according to size as it will naturally decrease.
2. SMT will be much lower than THT, because the components on the PCB will be more intensive (also small).
3. On the other hand, if the components on the board is very dense, then the routing must also be more detailed, and the equipments should be correspondingly higher required. The cost of these problems,compare to reduce the PCB size with more savings.
4. The more layers the higher the cost.
5. Drilling takes time, so NTHs the less the better.
6. Buried holes is more expensive than NTHs. Because the buried hole must be drilled at the junction.
7. Hole size.
8. Others.

Last, the equipments in manufacturing is more complicated, the cost will be more high. Understanding of PCB manufacturing process is very useful to save the cost. CMD Circuis have professional working group to analyze and control the cost of material.

Circuit boards Electrical testing methods

This time let’s talk about the electrical testing methods of circuit boards, there are: Dedicated,Universal Grid,Flying Probe, non-contact electron beam, conductive cloth (plastic), Capacity and ATG-SCAN MAN), of which there are three most commonly methods:Dedicated,Universal Grid,Flying Probe.To better understand the functions of various equipmenst, the following will compare the characteristics of three major methods.

1. Dedicated test
The reason for the specific type, mainly because they use fixtures only applies to one material number, different number of board material can not be tested and can not be recycled. Test points, the single panel in the 10,240 points, 8,192 points within each two-sided test can be made, the density in the test, because the probe head and the thickness of the relationship between the pitch used for more than the board.
2. Universal Grid test
The basic principle is the Universal test circuit PCB layout is based on the grid (Grid) to design, generally refers to the so-called grid line density,while the Universal test is based on this principle. Therefore making the fixture simple and fast, and explore needle can be reused.Universal test points is usually more than 1 million points.
3,Flying Probe test
Flying Probe test principle is very simple, only needs two probes for x, y, z movement to each of the two end points of each line tested, so no additional production of expensive fixtures. However, as is the end-point test, so very slow speed, about 10 ~ 40 points/sec, more suited for samples and small circuit boards production.

If you need more information of flexible circuits and printed circuit boards, please don’t hesitate to contact us.