The influence of 0201 elements on the manufacturing process

The influence of 1 and 0201 components on PCB design

The application of 0201 component has a great influence on the design and manufacture of printed circuit board. Its main influence is the design aspects, including pad design, component spacing and wiring design. The 0201 component requires smaller pads, finer and denser wiring, and smaller component spacing. For these changes, technically feasible, but the direct impact on the production costs of PCB, is a substantial increase in costs. Let's discuss in detail the impact of 0201 on the PCB component spacing and wiring design.

1.1 component spacing and wiring design

The main reason for using 0201 components is to save space on PCB. This allows more components to be designed on the PCB to increase product functionality and reduce product size. The benefits of the 0201 component include reduction in component spacing in addition to its reduced size. This saves space further. Some manufacturers and research institutes have done research in this area, and the results show that the use of 0201 component PCB saves 60% more space compared with 0402 of PCB. The results also show that the minimum distance between components can be as small as 6mil.

Currently, for component 0201 applications, the requirement for the component spacing of the contract manufacturer is 16mil. The regular distances we can see are 8mil, 12mil, 16mil, and 20mil. Of course, the smaller the space between the components, the more space it saves. But the smaller spacing has great influence on the accuracy of the patch equipment, the accuracy of the template and the design of the PCB wiring. The smaller the component spacing, the higher the accuracy of the placement machine, and the smaller the opening spacing on the template, the more difficult it is to make the template. If you want to achieve 8mil spacing, you need to make some improvements in the wiring of PCB.

First, take a look at the line width and line distance of the PCB cabling. See table 1.1-1.3

Table 1.1 line width and line distance

Line width / inch spacing / inch remark width / inch line spacing / inch remark

0.10, 0.010, easy, 0.005, 0.005 difficulties

0.007, 0.008, standard 0.002, 0.002 extremely difficult

Table 1.2 line width and line distance of outer layer

Function 0.012/0.10, 0.008/0.008, 0.006/0.006, 0.005/0.005

Line width / inch 0.012, 0.010, 0.010, 0.010

Pad spacing / inch 0.008, 0.008, 0.008, 0.008

Line spacing / inch 0.008, 0.008, 0.006, 0.006

Wire pad spacing / inch 0.006, 0.006, 0.007, 0.005

Figure 0.005 0.005 0.005 inch Ring * 0.006

* the distance from the edge of the hole to the edge of the pad

Table 1.3 line width and line distance of inner line

Function 0.012/0.10, 0.008/0.008, 0.006/0.006, 0.005/0.005

Line width / inch 0.012, 0.008, 0.006, 0.005

Pad spacing / inch 0.010, 0.008, 0.006, 0.005

Line spacing / inch 0.010, 0.008, 0.006, 0.005

Wire pad spacing / inch 0.010, 0.006, 0.006, 0.005

Doughnut / inch 0.008, 0.008, 0.007, 0.006

Line hole edge / inch 0.018, 0.016, 0.013, 0.016

Plate hole edge / inch 0.018, 0.016, 0.013, 0.016

We generally discuss outer lines here, so you can see that both line width and line spacing have a range. Generally, the line width and line distance are X / X. For example, the line width is 7mil, and the line spacing is 8mil. Then, note: 7 / 8. The minimum standard for current PCB routing is 5 / 5, that is, the line width of 5MIL and the line spacing of 5mil. Due to the use of 0201 components, to a certain extent can be properly used 3 / 3, 4 / 4 wiring design. In addition, when there is a BGA component, you can use 4 / 4 wiring design in a certain range. However, if larger scale use of 3 / 3, 4 / 4 wiring design will have a negative impact, that is, the increase in PCB costs. If the 3 / 3 cabling design is used, the cost increase is probably about 15%-25%.

Another aspect to consider is the influence of routing width, pitch, and component / pad spacing. For example, if the 8mil pad spacing is used, even the wiring design of 3 / 3 can not be used. Because there is not enough room between the components. The minimum requirement is 9mil.