Pedestal Pin Registration System for Multi-Layer Lamination
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-27
The construction of multi-layer printed circuit laminates is typically done with laminate tooling which uses precision machined registration holes which correspond to similarly shaped registration pins mounted on a carrier fixture (Fig. 1) to control the placement of stacked internal planes with respect to the tooling. Because of the high temperature and pressure encountered during lamination and the uneven heating of the tooling in relation to the part being built, product stress and plane misalignment takes place. A round (or other configuration) pedestal pin that is not fixed to the carrier fixture serves as a registration device which does not align the internal planes with the tooling to achieve the proper registration but aligns one plane to another plane to permit the tooling and the product to move independently.