East guide science and technology on the copy board series three: tool to select the copy board 【PCB copy board】
Update date：2012-6-25
As we have already introduced the concept of copy board and some relevant knowledge, Next we will begin to copy board, copy board, we will know the tools of the copy board, according to series two mentioned, we know that the copy board on the steps, we also around the three-step selection tool, the first step: grinding; Step two: Scan; Step 3: copy.
First step, the grinding plate, single-layer board, of course, can dispense with this step, having multilayer will need to polish, polish the good or bad relationship to copy the success of the board, so the grinding is a very important step, grinding PCB division, generally speaking, the PCB partition a variety of approaches, chemical and physical methods are two general chemical methods is the medication of water treatment, but often above the line of the syrup will disposed of together, so We usually use a physical approach, the physical methods in general is polished with sand.
Grinding need to ensure that the following principles: (1) line can not be worn, grinding needs uniform thickness is moderate, not too thin, too thin board is easily broken, thick scans is not good.
In general, the best polishing effect is the grinder, but the grinder the high cost, bulky, general grinding machines are mechanical processing industry is relatively common. Copy board industry is not the best choice, we generally choose to sand (or emery cloth) mill, which need to select the fine particles of sand, uniform force, Manman Mo, learning spirit pestle into a needle, a step by step can not be done quickly, to be careful.
The second step scanning. The scan is a copy board to prepare, in general, no skills, equipment selection, suggest that you choose a double pulley scanning equipment, we insist on the choice not to buy the most expensive, and only buy for their own use.
The third step, copy board. Copy board software is good or bad depends mainly on the function is complete, it is best to do can all work on the copy board software, so that the efficiency was high, including components placement support PROTEL99SE of for the best, the current 99SE components library very rich, can be downloaded to the interconnection network. This is also critical, copy board rely on the era of hand-made components is over, because as many as hundreds of elements, like BGP component package by hand go too costly to build components.
Choose the perfect software to ensure that the effect of perfect two-tier board and multilayer copy board, technically should have a wealth of experience and technical skill. With a double-layer or multi-layer PCB board, the holes in the same location, connections, then the copy board software to depict the wiring rules of the original board, the two-tier board has ferreted out the top-level PCB files stacked in another layer of scanned images, both through-hole overlap, and then set the top line and the screen is not displayed to depict the lines of another layer of vias location, so, export the PCB file contains a dual panel both sides of the data.
Copy board software currently on the market the most commonly used PROTEL99SE another quickpcb 2005 V3.0 and various versions of a color copy board software.
Which, originally Protel99SE is applied to the EDA design software the Windows9X/2000/NT the operating system, design database management mode, networking design, with a strong ability of data exchange and openness and 3D simulation capabilities, is a 32 design software, you can complete schematic circuit design, printed circuit board design and programmable logic device design can be designed to 32 signal layers, power of 16 - stratigraphy and 16 machine processing layer.
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