Dichromic process for preparation of conductive circuit

Details Dichromic process for preparation of conductive circuit Dichromic process for preparation of conductive circuit

1984-11-27

1986-12-23

Kimlin, Edward

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156633, 156644, 156655, 1566611, 430312, 430313, 430315, 430503, 427 97, 427 98, B44C 122, B29C 1708, G03C 500

Patent

active

046311114

ABSTRACT:
Process for preparation of conductive circuit utilizing two photohardenable layers on substrate which may contain a conductive circuit, the upper photohardenable layer becoming hardenable and nontacky when exposed to short wavelengths of radiation (ultraviolet) the lower photohardenable layer being tacky and sensitive to long wavelength radiation (visible light). The photohardenable layers are imagewise exposed through a dichromic phototool (black/yellow also having clear areas) and the unhardened image areas are solvent developed revealing tacky areas. The tacky areas are treated with metal or alloy particles or plating catalyst material, and the metallized or catalyzed image is electrolessly plated. Multilayer conductive circuits can be prepared.

REFERENCES:
patent: 3751248 (1973-08-01), Goell
patent: 4411980 (1983-10-01), Haney et al.
patent: 4469777 (1984-09-01), O'Neil
patent: 4572764 (1986-02-01), Fan

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