The engraving France making circuit board [PCB design]
Update date：2012-7-31
When we design the PCB file, or PCB copy board, the next step is to convert our files to generate a finished product, usually what we do is designed PCB files to professional pcb direct the production of this process to go through a time of 3-7 days. A product development process in as little as five times a second, more than a dozen times to modify the developer can not be patient to wait too much time on circuit board production, so the developers in the experimental environment through a variety of methods to achieve rapid production circuit boards, the main physical and chemical methods.
(1) physical methods. Painting on a blank CCL circuit diagram in accordance with the design requirements first, and then through a variety of cutting tools and power tools, hand the unwanted copper foil dig up. This method is laborious, but also relative to the end, only a relatively simple circuit board in order to use less demanding. Physical methods because of all the processes are manual, time and labor, low efficiency, and manual control factors, it is difficult to achieve tactics board. In addition, the entire operation must be careful to look to, accidentally carved off the lines that should not be carved, all must again, with potential quality problems.
The advantage is cheap, but a long time.
(2) chemical methods. The first run out of painted or photographic rule of law to make a bottom plate, bottom plate when the exposure mask, dry film on both sides of the hot pressing of the metal plate standing at developing light curing membrane masking the need to retain. Through the covering layer of protection in the blank CCL, and the need to remove the nudity, do not need the copper corrosion to the corrosive solution, corrosion after cleaning and drying. A variety of ways of covering the protective layer, there are the most traditional method of hand description paint, paste the custom self-adhesive Film is only in recent years developed thermal transfer printing of PCB. For the production of more complex circuit boards, chemical etching method is more reliable, lower cost. Chemical methods to grid the entire board soaked in a solution of corrosion, corrosion should be washed and baked in the circuit board through a cold and a hot one on a wet, greatly affected the adhesion of the CCL, the experimental commissioning process because of the need changing different parameters of electronic components caused by the copper foil off.
East guide science and technology in the actual process to choose quick proofing can help customers 12 hours urgent proofing, making the development time significantly narrowed.
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