Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1987-10-27
1989-09-12
Beck, Shrive
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427 96, 4274431, 427305, B05D 512
Patent
active
048658774
ABSTRACT:
A method for roughening a ceramic substrate surface includes a step of sequentially taking out part of roughening a treatment bath of phosphoric acid into which the ceramic substrate is dipped prior to a formation on the substrate of conductor a layer, and subjecting the part of the bath taken out sequentially to regeneration treatment. Any increase in the viscosity due to dehydrating condensation of the roughening bath can be thereby effectively restrained to prolong effective life of the bath. Further, the surface roughened ceramic substrate can be provided thereon with conductor layers smoothly formed by means of a plating and eventually with a circuit pattern as well as a resistor formed on the pattern within an inert gas atmosphere.
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Chemical Abstract 105:196165 vol. 105, 1986, p. 323.
Ishihara Masayuki
Kajita Susumu
Ogawa Satoru
Waki Kiyotaka
Yamaguchi Noboru
Beck Shrive
Dang Vi Duong
Matsushita Electric & Works Ltd.
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