International Business Machines Corporation

Werner Cziep

Wolf-Dieter Ruh

Ulrich Kuenzel

Viaholes are dry-etched into glass fiber reinforced plastic sheets according to a predetermined hole pattern, leaving the glass fiber meshing practically unaffected. The method is used, for instance, to fabricate plastic sheets with unilaterally or bilaterally applied conductor patterns and viaconnectors that are conductively linked to the conductor patterns, and to fabricate multilayer board laminates obtained by several plastic sheets carrying the conductor pattern being alternately packaged, if required, with untreated copper sheets, and by the package thus obtained being subsequently laminated. Such boards and/or plastic sheets bilaterally provided with conductor patterns may be used as connector boards for, say, multilayer ceramic modules carrying semiconductor chips.

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Altdorf, Germany

Werner Cziep