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Which Valor software?
Reverse engineering Gerber's to a CAD design, involves a fair bit of intervention, depending on the ability of the CAD software.
Gerber is a dumb format, it is purely a set of artworks showing copper patterns, there is NO component footprint or part information, this has to...
This is covered in multiple documents, by the likes of Henry Ott, etc.
Many data sheets for more complex devices, often have numerous notes covering the decoupling capacitors. The capacitance of a decoupling capacitor is secondary to the pin/cap loop inductance. The general rule, is the...
GROUND is ground, protective earth... GND and Ground are used but are technically incorrect, schematics really should use 0V's for the 0V planes and references...
I would learn the tool, you have. I have found that, surprise, surprise, I have been able to lay out PCB's in all the PCB software I have used... None of them are perfect, the trick is to learn PCB design, then work with the tool, to achieve the desired finished PCB...
Most PCB systems can now export a STEP file, or an IDF file. To create either file, the software needs to know the height of each component, or in the case of STEP files, have a pre-designed 3D model of the component, that can be used instead of a plain extruded box. You may be better with...
This is a rather wide subject to cover in one book...
I would look up design for manufacture information as well as standards and requirements for the industry sector you are aiming for. Having at least a basic understanding of the IPC standards would also be a big benefit, I would recommend the...
Looks OK.
What I will say is avoid GND pours on adjacent layers under isolated GND's, you will get capacitive coupling and thus higher frequency noise will couple between the GND's...
I do not use thermal relief on outer layers on SMD pads, never. Many SMPS SMD designs require a good connection both for current requirements and thermal requirements (getting heat away from the components). PTH components will be decided by the amount of copper connected and on how many layers...
Figure 1 is correct, the wider part of the trapezoid will always be next to a core. As you etch down through the copper, you also loose some width, starting at the outermost edge of the copper.
I agree with FvM.
If you compare ( preferably by doing a real design) all the PCB packages, you will find they all have positive and negative points... Cost of ownership can be determined by getting quotes from the vendors. How a tool performs, depends how well it is used... Personally, myself...
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