Macro-Defect-Free/Polyelectrolyte Cement Composite
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
A technique is described whereby a hardened cement composite is produced which is stronger and tougher than polyelectrolyte cements and chemically more resistant and thermally more stable than macro- defect-free (MDF) cements. Described are preparation methods that enable the cements to be bonded with conductive layers of metal, on one or both sides, at or near room temperatures, for use in electrical components, such as integrated circuit substrate materials. Typically, MDF cements, in which relatively large pores in the set cement are eliminated by the addition of polymers and have had their strength increased significantly by virtue of the Griffith criteria. However, these cements are still hydraulic, such that most of the water added to the pastes remains in the hardened cements as structural water.