Patent ID: 6036836
Filing Date: 2000-03-14
Classification: H01L,H05K

Abstract:
Process to create at least one stand-off on an electronic circuit, characterized in that said stand-off is created on the surface of a printed circuit board constituting said electronic circuit and being coated with a first layer of copper, said process including the sequential steps of:depositing a first layer of photo-resistive material covering said first layer of copper;creating a first pattern uncovering said first layer of copper at least at the location of the future stand-off;plating a second layer of copper onto the uncovered portion of said first layer of copper, said second layer of copper being substantially thicker than said first layer of copper, said second layer of copper forming a second pattern;depositing a second layer of photo-resistive material;creating a third pattern uncovering said second layer of copper at least at the location of said future stand-off; andplating a third layer of copper onto the uncovered portion of said second layer of copper after the step of creating the third pattern, wherein said third layer of copper forms a fourth pattern different from the second pattern and wherein said second layer of copper physically separates said entire third layer of copper from said first layer of copper.