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US 2010/0167210 A1Published application
Multi-layer embedded capacitance and resistance substrate core
AssigneeEndicott Interconnect Technologies, Inc.
InventorsRabindra N. Das, John M. Lauffer, Irving Memis, Steven G. Rosser
Life of this patent
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Abstract
A multi-layer imbedded capacitance and resistance substrate core. At least one layer of resistance material is provided. The layer of resistance material has a layer of electrically conductive material embedded therein. At least one layer of capacitance material of high dielectric constant is disposed on the layer of resistance material. Thru-holes are formed by laser.
Claims8
1-5. (canceled)
A method of making a multi-layer embedded capacitance and resistance substrate core, the steps comprising:
- a) providing a Laser drillable dielectric having an upper surface and a lower surface;
- b) disposing a first resistance layer on the upper surface of said Laser drillable dielectric;
- c) disposing a first electrically conductive layer on said first resistance layer;
- d) laminating said laser drillable dielectric, said first resistance layer and said first electrically conductive layer to form a first resistance structure;
- e) applying and developing a first resist to said first electrically conductive layer;
- f) selectively etching said first electrically conductive layer;
- g) stripping said first resist from said first electrically conductive layer;
- h) disposing a first copper-coated capacitance layer on said first electrically conductive layer;
- i) laminating said first copper-coated capacitance layer and said first resistance structure;
- j) applying and developing a second resist on said first resistance structure;
- k) stripping said second resist;
- and
- l) selectively etching said first copper-coated capacitance layer.
10 more elements
12-16. (canceled)
Dependencies are inferred from the claim text.