| 摘要 |
1,164,845. Printed circuits. UNION CARBIDE CORP. 17 Aug., 1966 [20 Aug., 1965; 18 Feb., 1966; 14 July, 1966], No. 36848/66. Heading H1R. [Also in Divisions C7 and G2] A printed circuit is made by subjecting a fabricated substrate of a polyarylene polyether to treatment with a fluid selected from N: N- dimethylformamide, pyridine or its inertly substituted derivatives and alkylene glycols, next conditioning with a strong oxidizing solution, and then plating with metal in succession by first an electroless and then an electrolytic process (see Division C7). |
