Abstract A method of depositing a metal on a surface of a substrate is disclosed. A suitable colloidal sensitizing soltuion, comprising insoluble hydrous oxide particles, selected from among solutions revealed in application Ser. No. 8,022, filed Feb. 2, 1970, is applied to a surface of a substrate. The sensitized substrate surface is then treated with a suitable redox agent to delineate a pattern capable of reducing an activating metal ion to an activating metal. Alternatively, a positive colloidal sensitizing solution, i.e., a solution comprising ions capable of reducing an activating metal ion to an activating metal is applied to the surface and the sensitized surface is then treated with an activating metal ion containing solution to deposit an activating metal pattern thereon. Alternatively, a colloidal activating metal solution is applied to the surface and the surface is then treated with a solution comprising an ion capable of reducing an activating metal ion to deposit an activating metal pattern thereon.
A METHOD OF DEPOSITING A METAL PATTERN ON A SURFACE OF A SUBSTRATE, WHICH COMPRISES: A. IMPRESSING A COLLOIDAL ACTIVATING SOL PATTERN, CORRESPONDING TO THE METAL PATTERN, ON THE SURFACE, SAID ACTIVATING SOL COMPRISING AN INSOLUBLE HYDROUS OXIDE OF AN ACTIVATING METAL SELECTED FROM THE GROUP OF ACTIVATING METALS CONSISTING OF PD, PT, AG AND AU; AND B. TREATING SAID IMPRESSED PATTERN WITH A SOLUTION COMPRISING IONS CAPABLE OF REDUCING AN ACTIVATING METAL ION TO AN ACTIVATING METAL TO DEPOSIT AN ACTIVATING METAL THEREON.
Claim 2
Independent Claim
84 words
A METHOD OF DEPOSITING A METAL PATTERN ON A SURFACE OF A SUBSTRATE, WHICH COMPRISES: A. IMPRESSING A COLLOIDAL ACTIVATING SOL PATTERN, CORRESPONDING TO THE METAL PATTERN, ON THE SURFACE, SAID ACTIVATING SOL COMPRISING AN INSOLUBLE HYDROUS OXIDE OF AN ACTIVATING METAL SELECTED FROM THE GROUP OF ACTIVATING METALS CONSISTING OF PD, PT, AG AND AU; AND B. TREATING SAID IMPRESSED PATTERN WITH A SOLUTION COMPRISING IONS CAPABLE OF REDUCING AN ACTIVATING METAL ION TO AN ACTIVATING METAL TO DEPOSIT AN ACTIVATING METAL THEREON.
Claim 3
Dependent Claim
32 words
THE METHOD AS DEFINED IN CLAIM 1 WHICH FURTHER COMPRISES TREATING SAID ACTIVATING METAL-DEPOSITED PATTERN WITH AN ELECTROLESS METAL PLATING SOLUTION, CATALYZED BY SAID ACTIVATING METAL, TO DEPOSIT AN ELECTROLESS METAL THEREON.