expression, noun
thin board; sheet; thin plate
Refers to a thin, flat piece of material such as wood, metal, or plastic. The phrase is a simple noun phrase composed of the adjective 薄い (thin) and the noun 板 (board/plate).
この薄い板はベニヤです。
This thin board is plywood.
薄い板を切って棚を作った。
I cut a thin board and made a shelf.