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US 5,328,522 AGranted
Solder pastes
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorsMichael W. Sowa, Richard D. Jenkinson
Life of this patent
Estimating the term…
Abstract
Solder powders coated with a thin layer of parylene and solder pastes containing the coated solder powders are disclosed. The coated solder powders can exhibit a high degree of resistance to oxidation and to reaction with the flux contained in the solder paste without substantially interfering with the reflow characteristics of the solder.
Claims10
A solder paste comprising
- (i) a flux and
- (ii) a coated solder powder comprising solder particles coated with parylene in an amount of from about 0.001 to about 0.5 weight percent based on the total weight of the coated solder powder and effective to inhibit oxidation of the solder particles in the solder paste without substantially inhibiting reflow characteristics of the coated solder powder, said parylene having a melting point lower than said solder particles.
Dependencies are inferred from the claim text.