High-performance MCMs for mainframe computers

Presents a basic scheme for water-cooled multichip modules (MCMs). Multichip modules are a very effective approach to achieve high packaging density, excellent cooling and high electrical performance of mainframe processors. Two characteristic approaches are compared, namely an MCM with flip-chip mounting and an MCM with micropacks. The electrical characteristics of chip-to-board connections, microwiring substrates and planar module connectors have to be carefully designed. The ICs should preferably be BiCMOS AS ICs with up to 80000 gate functions with optional embedded SRAMs of up to 360000-bit capacity. The mechanical construction, wiring and delay rules, and test requirements for such chips are considered.<>