Irregular shape PCB to add process edge?
What is pcb circuit board process edge?
pcb process edge is to assist the production of plug-in board, welding over the wave crest on both sides or four sides of the PCB board to increase the part, mainly to assist production, does not belong to the PCB board part of the production is completed need to remove. Irregularly shaped pcb board processing process side width is routinely 5mm or 3mm, the SET size can be greater than 7CM after piecing the board.
With the size of the circuit board is shrinking, and more and more functions in the circuit board, coupled with the increase in clock speed, the design has become more complex, the expected complete circuit board is usually a regular rectangular shape, but there are many designs require irregularly shaped circuit boards, and such shapes are often less easy to design, this chapter focuses on irregularly shaped pcb board design and process edge issues to make detailed answers.
Irregularly shaped circuit board shape can be easily created in most EDA Layout tools, when the board shape needs to fit into a highly restricted complex enclosure, for irregularly shaped pcb board designers is not so easy, because the functions in these tools and mechanical CAD systems are not the same, complex circuit boards are mainly used for explosion-proof enclosures, subject to many Mechanical constraints, trying to rebuild this information in the EDA tool may take a long time and is not productive, mechanical engineers are likely to have created the PCB designer's desired housing, board shape, mounting hole locations and height restrictions.
Because of the curvature and radius in the board, it can take longer than expected to rebuild even if the board profile is not complex. From today's consumer electronics, you'd be surprised how much engineering goes into trying to fit all the features in a small package that isn't always rectangular. Smartphones and tablets are the first to come to mind, but there are many similar examples, and the question is "How do I import the defined mechanical engineering specifications into a PCB design tool?" Reusing this data in mechanical drawings eliminates duplication of effort and, more importantly, human error. We can solve this problem by importing all the information into the PCB Layout software using DXF, IDF or ProSTEP formats. This saves a lot of time and eliminates possible human errors. We will look at each of these formats in turn.
DXF is one of the oldest and most widely used formats for exchanging data between mechanical and PCB design domains, mainly electronically, and was developed by AutoCAD in the early 1980s. This format is primarily used for two-dimensional data exchange. DXF import/export requires additional functionality to control the layers, different entities and cells that will be used in the exchange process.
The STEP format allows for the transfer of board dimensions and component layouts, but more importantly, components no longer have a simple shape with only height values. Both board and component information can be passed between PCBs and machinery, and there is still no mechanism by which changes can be tracked. To improve STEP file exchange, we introduced the ProSTEP format, which moves the same data as IDF and STEP and is a significant improvement - it can track changes and also provides the ability to work in the original system of the discipline and review any changes after the baseline has been established.