Patent ID: 9420697
Filing Date: 2016-08-16
CPC Classification: H05K

Claim Text:
1. A method for manufacturing a printed wiring board, comprising: forming an interlayer insulation layer on a conductive circuit; applying laser to a portion of the interlayer insulation layer such that an opening reaching to the conductive circuit is formed for a via conductor; subjecting the opening to a plasma treatment using a processing gas which includes a reactive gas comprising a fluorovinyl ether gas having a double bond of two carbon atoms and a fluoroalkyl ether group; forming an upper conductive circuit on the interlayer insulation layer; and forming a via conductor in the opening such that the via conductor connects the conductive circuit and the upper conductive circuit, wherein the plasma treatment is a 60-Hz non-equilibrium plasma treatment under an atmospheric pressure, and the reactive gas is at least one of trifluorovinyl(pentafluoroallyl) ether and decafluoro-3-oxa-1,6-heptadiene.