| 摘要 |
<p>A component of printed circuit boards consists of a laminate (30, 30') constructed of at least one sheet of copper foil (C) which, when fabricated into a printed circuit board, constitutes a functional element of the board. The other element of the laminate is a substrate sheet (A) of e.g. aluminium that constitutes a discardable element of a finished printed circuit board. One surface (Ci, Ai) of each of the copper sheet (C) and the aluminium sheet (A) is essentially uncontaminated and are engageable with each other at an interface. A band of flexible adhesive (40) joins the uncontaminated surfaces (Ci, Ai) of the sheets together at their borders and defines a substantially uncontaminated central zone (CZ) interiorally of the edges of the sheets and unjoined at the interface. Islands (50) of flexible, water-soluble adhesive joining the uncontaminated surfaces (C, A) of the sheets at a predetermined location spaced inwardly from an edge of the joined sheets through which tooling pin holes may be formed to facilitate handling of the foil.</p> |
