Patent ID: 6207354
Filing Date: 2001-03-27
Classification: H01L,H05K

Abstract:
A method of making a circuitized substrate, said method comprising:providing an electrically insulative base member having first and second opposing surfaces;depositing a first layer of metallization onto each of said first and second opposing surfaces of said base member,removing a selected portion of said base member to form an open cavity therein having sidewalls;depositing a second layer of metallization onto said first layer of metallization on said first and second surfaces of said base member and onto said sidewalls of said open cavity;depositing a layer of photoimaging material onto said second layer of metallization on said first and second opposing surfaces of said base member and said sidewalls;exposing selected portions of said layer of photoimaging material to define circuit patterns comprised of said first and second layers of metallization on said first and second opposing surfaces;removing selected portions of said photoimaging material to expose said circuit patterns on said first and second opposing surfaces while not removing photoimaging material on said sidewalls;removing said exposed first and second layers of metallization to form said circuit patterns on said first and second opposing surfaces; andsubstantially removing any remaining photoimaging material on said sidewalls and said second layer of metallization.