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May I have smaller spacing than B1 ( say as 0.05mm) at the conduction spacing if voltage between conductors is around 5V?

I'm curious that IPC conduct spacing of requirement of 0-15V is 0.05mm, but if below 15V this spacing can be reduced linearly? how to caculate? Thanks

Thanks enter image description here

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    \$\begingroup\$ Smaller, perhaps; but is IPC-2221 a requirement for the design? \$\endgroup\$
    – Tim Williams
    Commented May 10 at 4:09
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    \$\begingroup\$ You can have what you want but, whether you will have a reliable design is another matter. \$\endgroup\$
    – Andy aka
    Commented May 10 at 7:38
  • \$\begingroup\$ IPC-2221 have conductor min. spacing of conductor : 0.015mm for 15V DC. Want to know smaller spacing if voltage is smaller 15V. \$\endgroup\$
    – wisleep wisleep
    Commented May 10 at 8:37
  • \$\begingroup\$ I'm curious that IPC conduct spacing of requirement of 0-15V is 0.05mm, but if below 15V this spacing can be reduced linearly? how to caculate? Thanks \$\endgroup\$
    – wisleep wisleep
    Commented May 11 at 2:02

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I know nothing about your design and which PCB manufacturing process you're using but I would not recommend this.

A manufacturer with quite an advanced process like Advanced Circuits has a minimum track width and spacing specification of 0.00275" (~0.07mm)

Advanced Circuits Minimum Width and Spacing Specification Extract from Capabilities Catalog

You should also be aware that copper feature spacing is typically larger on internal layers, such as a minimum 0.003" (0.076mm) spacing on the Advanced Circuits process.

I suspect that you will really struggle to find a fabricator who is capable of producing PCBs reliably at such a small scale.

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  • \$\begingroup\$ I'm curious that IPC conduct spacing of requirement of 0-15V is 0.05mm, but if below 15V this spacing can be reduced linearly? how to caculate? Thanks! \$\endgroup\$
    – wisleep wisleep
    Commented May 11 at 2:00

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