Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
Method for selectively coating an existing metallurgical pattern supported on a dielectric substrate with a diverse metal layer characterized by the following steps: blanket depositing said metal layer (5) on said substrate (1) and said metallurgical pattern (2, 4) ; heating the then present structure; diffusion bonding said metal layer (5) to said metallurgical pattern (2, 4); cooling said structure to spall said metal layer (5) on the surface of said substrate (1) due to differences in the expansion and contraction differentials therebetween; and mechanically removing said metal layer (5) from said surface.
Claim 2
Dependent Claim
93 words
Method for selectively coating an existing metallurgical pattern supported on a dielectric substrate with a diverse metal layer characterized by the following steps: blanket depositing said metal layer (5) on said substrate (1) and said metallurgical pattern (2, 4) ; heating the then present structure; diffusion bonding said metal layer (5) to said metallurgical pattern (2, 4); cooling said structure to spall said metal layer (5) on the surface of said substrate (1) due to differences in the expansion and contraction differentials therebetween; and mechanically removing said metal layer (5) from said surface.
Claim 3
Dependent Claim
18 words
Method according to claim 1, wherein said metal layer (5) is made of conductive solderable or brazable metal.
Claim 4
Dependent Claim
49 words
Method according to claim 1 or 2, wherein layer (5) is made of a metal which is not wetable to said substrate (1) but mechanically adhesive to said substrate (1) and said metallurgical pattern (2, 4) and which has a higher coefficient of thermal expansion than said substrate (1).
Claim 5
Dependent Claim
25 words
Method according to any one of claims 1 to 3, wherein said substrate (1) is formed of a ceramic material material, like an alumina ceramic.
Claim 6
Dependent Claim
24 words
Method according to any one of claims 1 to 4, wherein said metallurgical pattern (2, 4) is comprised of a refractory metal, like molybdenum.
Claim 7
Dependent Claim
21 words
Method according to any one of claims 1 to 5, wherein said layer (5) is made of a metal, like nickel.
Claim 8
Dependent Claim
21 words
Method according to any one of claims 1 to 6, wherein said metal layer (5) is removed from said substrate ultrasonically.
Claim 9
Dependent Claim
51 words
Method according to any one of claims 1 to 7, wherein a conductive passivating diverse second metal layer (10) is deposited over the first said metal layer (5) prior to said heating step and wherein both said metal layers (5, 10) are interdiffused at the interface therebetween during said heating step.
Claim 10
Dependent Claim
15 words
Method according to claim 8, wherein the said second layer (10) is made of gold.