EMBEDDED TRACES

摘要

A printed circuit board includes a laminate substrate. The laminate substrate includes catalytic core material that resists metal plating except where a surface of the catalytic material is ablated. Metal traces are formed within in trace channels within the laminate substrate. The channels extend below the surface of the catalytic material.

主权项

1. A method for forming a printed circuit board, comprising:
forming trace channels in a laminate substrate, the laminate substrate including catalytic core material overlaid with non-catalytic material so that the laminate substrate resists metal plating except where catalytic core material is exposed, wherein the channels are ablated to expose the catalytic core material; immersing the laminate substrate in a metal bath so that the metal plates within the trace channels but not on unablated portions of the surface of the laminate substrate; and, planarizing the laminate substrate so that metal plated within the trace channel is flush with a surface of the laminate substrate.