We have several designs of motherboards that use buried resisters for pull-up impedance, thus eliminating the need for resister packs or including this requirement on already densely populated card assemblies. We have realized benefits of increased I/O support and realized reduced cabinet sizes with this technique. The reduced cabinet size benefits weight, cost, natural frequency, and cooling. These are all positives and there are a few drawbacks related to the supplier base. Several manufactures realize the cares needed and are doing a great job. Kevin Thorson, Loral Defense Systems - Eagan ---------- From: TechNet-request To: Technet Subject: Buried Resistors Date: Tuesday, February 27, 1996 4:09PM My company is investigating building buried resistors into multilayer PCB's. Is there a demand for PCB's containing buried resistors to be produced in volume? What type of technologies are contained on these boards (line/space, BGA, buried via's, etc.) Are there any shops currently producing them in volume? nwbluez