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They are almost the same. It is very dependent on the type of fpc he is doing. There are flex to install and dynamic flex applications. The FPC's are used to save space and wieght most of the time. High layer count FPC's do get rigid but with the materials that are available a 12 layer can still...
Looking at your stack up. Delamination would not be a issue. Since the amount of resin from the prepeg should fill all the air gaps. There would be a problem with warping as stated by Marce.
Hello
There are 2 types of constructions to make a basic 10 layer board with TH. There is a foil construction that uses CU foils as layer 1 and layer 10. There is also a core cap consturction that does not use CU foils but uses cores. I have attached some sampled stack ups for you to take...
That is a very good point. Don't reduce test points if it will effect the quality of your pcb. On another note what type of pcbs do you guys lay out and what issue do you typically run into
When testing your designs? Just thought I would ask that questions. Do you guys design circuits that has a...
Enrico
I work as an applications engineer in the manufacturer of flex circuits. I specialize in both rigid and flex/rigid boards. Cost reduction is mostly in part by layer count and density of the circuit and quantity as you probably already know. There are always issue...
The questions are:
1) Having fewer nails is good or not for the tests? (less test points is good. You reduce the time of testing and rework if they have issues).
2) Do bare PCB tests cost less if the PCB require less nails? (no the test charges are calculated in the tooling).
The question you first have to ask yourself is what type of process this PCB will see during assembly. If you are going to be wire bonding then ENIG would not be the way to go. That would be things to consider. If it is just a basic PCB assembly then ENIG would be the cost effective way to go.
That is true regarding the quality of circuits you will receive. It is up in the air regarding that. I use a local company that out sources the parts to China. That way I send back parts to them and they request the RMA's for me. It is easier to do that. I use a local CM for assembly. It is...
This is possible. Using a Yag laser for controlling depth is another option besides milling. Milling is pretty accurate and can maintain a depth control of ~+/- .0015 mils. Using a Laser your depth control will be more accurate +/- 12um. The advantage of using a laser to do the milling (laser...
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