Patent ID: 6110650
Filing Date: 2000-08-29
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 at least one of said first and second opposing surfaces;positioning a photoimageable member onto said first layer of metallization, said photoimageable member including a layer of photoimaging material and a sacrificial dielectric layer thereon;exposing selected portions of said photoimaging material through said sacrificial dielectric layer to provide a pattern within said photoimaging material;removing a selected portion of said base member by a punching process to form an open cavity therein having sidewalls;depositing a second layer of metallization onto the sidewalls of said open cavity;removing said sacrificial dielectric layer;removing first selected portions of said photoimaging material corresponding to said pattern;depositing a third layer of metallization onto said first and second layers of metallization;removing remaining portions of said photoimaging material to expose selected parts of said first layer of metallization; andremoving said selected parts of said first layer of metallization.