PCB News - PCB board-making sensory infection

PCB board-making sensory infection
People who are engaged in electronic circuit design have a deep understanding that the most laborious task of designing a product is to build a board experiment, and the most laborious task of a board experiment is the manufacture of printed circuit boards. Although most people now hand over this annoying task to the circuit board factory to deal with, but it takes a long time to wait 3-7 days for each board making. New design inspiration is often persisted because of such annoyance and waiting. The Beijing gay circuit board manufacturing machine can quickly, automatically and accurately manufacture printed circuit boards based on PROTEL's PCB files. The user only needs to complete the design of the PCB file on the computer and send it to the machine, and the machine can automatically perform functions such as sharpening, drilling, and trimming, and output one or more printed circuit boards that meet the requirements. You can complete the manufacture of a circuit board in a few minutes in the laboratory, and your inspiration can be completed in an instant.
Traditional circuit board rapid manufacturing method
The development process of electronic products inevitably requires trial production of circuit boards. The most commonly used method for trial production is to send the designed PCB files to a professional circuit board factory for manufacturing ("proofing"). This process in Suri takes three days to a week. Time is life for product development. In the development process of a product, at least three or five times, as many as a dozen times of modification, make the developers unable to tolerate too much waiting, so under the conditions of the laboratory, the developers try to be independent and try to complete the rapid board production through various tricks. .

There are two main types of rapid plate making methods, physical methods and chemical methods.
Physical method: by using all kinds of knives and electric opening tools, the copper that is not needed on the circuit board is manually carved out. This method is laborious and has low accuracy, so it can be used only with relatively complicated lines.
Chemical method: By concealing the protective layer on the blank copper clad laminate, the unnecessary copper is etched away in the degrading solution, which is the method used by most pioneers in the future. There are many ways to hide the protective layer, mainly including the most traditional manual lacquer method, custom stickers method, film photosensitive method, and thermal transfer printing PCBA processing board method that has only been developed in recent years.
Hand-drawing paint: Use a brush or a hard pen to manually draw the outline of the circuit on the blank copper clad laminate, and then put it into the solution and fall directly after it is blow-dried.
Paste stickers: There are various types of stickers in the market that are made into strips and discs. On the blank circuit board, the different stickers can be combined according to the needs, and they can fall after being glued tightly.
Film photosensitive: The PCB circuit board diagram is printed on the film by a laser printer, and a layer of photosensitive material is pre-coated on the blank copper clad laminate (the coated copper clad laminate is sold in the market), and exposed, developed, fixed, and fixed in the darkroom. It can fall in the solution after washing.
Thermal transfer: Print the circuit directly on the blank PCB through a thermal transfer printer, and then put it into the liquid to fall.