International Business Machines Corporation

Mark Daniel Derwin

Jonathan David Reid

Ashwinkumar C Bhatt

Kenneth J Lubert

Timothy Lee Sharp

Daniel Peter Labzentis

The ends of thru-holes, disposed in components that are laminated together to form a composite structure are masked prior to lamination of the components to prevent bonding material bleed through the holes during the lamination process. The method effectively solves the problem of the need to remove laminate bleed from the outer surface of the composite structure after the joining process.

Method for forming a multi-layered circuitized substrate member

A circuitized substrate having conductive circuitry thereon and a barrier located adjacent at least portions of the circuitry to serve as an effective constraint for liquid material (e.g., encapsulant) applied to cover and protect the circuitry. The barrier can be formed concurrently with circuitry formation and formed of materials (e.g., copper, nickel, gold) similar to those used for the circuitry. The barrier is of two-part construction and of a particular shape wherein one part affords a greater surface tension than the other such that the material may actually lie on one part while being prevented from engagement with the other. Providing such dual (or 'progressive') surface tensions successfully constrains the liquid material at least until solidification thereof occurs.

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Binghamton, NY, United States of America

Mark Daniel Derwin