| 摘要 |
<p>A composite entry or backing board for use adjacent a printed circuit board during drilling therethrough, in which the adjacent faces of two laminar components of the entry or backing board are joined such that there is no relative slip during transportation, cutting and positioning, and they are separable by peeling them apart after use. The two laminar components are a substrate of fibrous board or paper (B), and a metal or metal alloy foil or sheet (A). The laminar components are joined by an intermediate layer of a low-strength adhesive. <IMAGE></p> |
