Method of curing thin films of organic dielectric material
First Claim
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1. A method of curing a thin film of organic dielectric material comprising the steps of:
- (a) applying a thin film of said dielectric material on a base substrate;
(b) raising said organic dielectric material to an elevated temperature above the glass transition temperature of the uncured material and less than the glass transition of the fully cured material; and
(c) flood irradiating said material with a flux of electrons while the material is at said elevated temperature.
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Abstract
A method of curing an organic dielectric layer, such as polyimide, used in a multichip module is disclosed. The method comprises heating the uncured polyimide layer to a temperature above its glass transition temperature, and irradiating the layer with a uniform flux of electrons, as in an e-beam apparatus. The process reduces deterioration at the interface between the dielectric films and the metal layers which when high temperature thermal curing is utilized, and reduces the stress of the resulting film. Multiple dielectric layers can be applied in this manner.
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9 Claims
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1. A method of curing a thin film of organic dielectric material comprising the steps of:
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(a) applying a thin film of said dielectric material on a base substrate; (b) raising said organic dielectric material to an elevated temperature above the glass transition temperature of the uncured material and less than the glass transition of the fully cured material; and (c) flood irradiating said material with a flux of electrons while the material is at said elevated temperature. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of forming a polyimide layer on an integrated circuit chip carrier, comprising the steps of:
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(a) providing a base substrate, (b) applying a uniformly thick liquid layer of a polyimide precursor material dissolved in a solvent on said substrate, (c) raising the temperature of said layer to a temperature above the glass transition temperature of the solvent-free polyimide precursor material and less than the glass transition of the fully cured material, (d) flood irradiating said layer with electrons while the layer is at said raised temperature, such that said layer is cured, and (e) forming a patterned metal film on the exposed surface of said cured layer. - View Dependent Claims (8, 9)
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Specification