Can I design SMD elements on the back of THT?

I'm designing a PCB right now and found out I can save a lot of space using the back of THT elements. Is it legit to design like that? Are there any problems that might occur?

If you want to meet CE requirements for noise immunity and emissions, a two-layer board would help a lot.

In het algemeen, there is no problem with putting components on both sides of the board, in the same place. If you had a two (or more) layer board, you’d probably want to put a ground or power plane between them. Echter, you can’t do that with a single-layer board. So you should watch out for a fast digital chip interfering with an analog circuit. It would be inadvisable.

Bijvoorbeeld, put a microcontroller on one side and a high input impedance buffer on the other. But putting decoupling caps opposite the chip is probably a good plan.

Lees verder: Telecom-elektronica productie

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Olivier Smit

Oliver is een ervaren elektronica-ingenieur met kennis van PCB-ontwerp, analoge circuits, ingebedde systemen, en prototyping. Zijn diepgaande kennis omvat schematisch vastleggen, firmware-codering, simulatie, indeling, testen, en probleemoplossing. Oliver blinkt uit in het omzetten van projecten van concept naar massaproductie met behulp van zijn elektrische ontwerptalenten en mechanische vaardigheden.
Picture of Olivier Smit

Olivier Smit

Oliver is een ervaren elektronica-ingenieur met kennis van PCB-ontwerp, analoge circuits, ingebedde systemen, en prototyping. Zijn diepgaande kennis omvat schematisch vastleggen, firmware-codering, simulatie, indeling, testen, en probleemoplossing. Oliver blinkt uit in het omzetten van projecten van concept naar massaproductie met behulp van zijn elektrische ontwerptalenten en mechanische vaardigheden.

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