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Laminates are selected based on the target application of your PCB. Essentially speed is one of the major criterion. While selecting the laminate one has to make sure about following aspects:
1. Loss tangent of the material at desired speed of operation
2. Dielectric constant
3. Cost and availability
4. Whether your manufacturer can make a PCB using that laminate.
For most of the devices that operate under 2GHz of switching , FR-4 is a good laminate to go with. Also it's economical.
Generaly, unless you sre going to do high gigaHz designs stick with FR4 based laminates, 150Tg are a good choice. Discuss the rest with your PCB manufacturer.
I woulkd also reccomend becoming familiar with IPC specifications, the C-1000 series of documents will cover most of what you will you'll face as a PCB designer.
CONSIDERATIONS WHEN SELECTING A LAMINATE SYSTEM:
• Does the PCB require lead free assembly?
• Does the PCB require a high Tg (ability to withstand high temperatures)
• Does the design require a low loss laminate?
• Can the program tolerate a single-source laminate?
• Will production volumes be manufactured in a different shop or country than the prototypes?
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