односторонняя плита
The single side is composed of "single side line + protective film". этот.

двухсторонняя плита
The double-sided board is composed of "protective film + double-sided circuit + protective film". There are copper foil on both sides of the double-sided flexible plate substrate, верхний и нижний этаж, so the softness of the double-sided flexible plate is worse than that of the single panel.

3. Single plus single composite board
этот

Комиссия по оказанию помощи
этот

5. Multilayer board
этот

6. Rigid-flex board
этот
