Patent ID: 6944945
Filing Date: 2005-09-20
Classification: H05K,Y10T

Abstract:
1. A method for forming a sequential build circuit board, the method comprising the steps of: forming a first layer by applying a first dielectric coating onto an electrically conductive support, forming first recesses in said first dielectric coating that define solder mount pads, and electroplating solder into said first recesses, forming a second layer by applying a second dielectric coating onto said first layer, forming second recesses in said second dielectric layer that define members selected from the group consisting of signal lines and interconnects, selectively electroplating copper into said second recesses to form copper deposits combined within said second recesses, the copper deposits of the second recesses being in electrical communication with the solder mount pads in said first layer, forming a third layer by applying a third dielectric coating onto said second layer, forming third recesses in said third dielectric coating that define signal lines or interconnects, forming within the layers reinforcing means that are ground or power planes, the reinforcing means provided by forming recesses within each sequential layer in registration with each other and electroplating copper into recesses, selectively electroplating copper into said third recesses, where said third recesses are in electrical communication with copper deposits in said second layer, and repeating the steps to form desired number of layers of a sequential build circuit board.