Patent ID: 7334323

Claim:
A method of making a multilayered circuitized substrate assembly, said method comprising: providing a first circuitized substrate including at least one high temperature dielectric layer having first and second opposing surfaces; forming at least one opening within said at least one high temperature dielectric layer of said first circuitized substrate extending from said first opposing surface to said second opposing surface; depositing a quantity of low temperature conductive paste within said at least one opening within said at least one high temperature dielectric layer of said first circuitized substrate, said low temperature conductive paste including an organic binder component and at least one metallic component including a plurality of flakes; providing a second circuitized substrate; and laminating said first circuitized substrate to said second circuitized substrate at a temperature sufficiently high enough to cause said flakes of said low temperature conductive paste to be sintered and of such a density within said paste so as to form at least one electrical path through said paste from said first opposing surface to said second opposing surface of said at least one high temperature dielectric layer of said first circuitized substrate, said first and second circuitized substrates forming a multilayered circuitized substrate assembly.