Electrolytic method for filling holes and cavities with metals

A galvanic method for filling cavities, through holes, blind holes or micro blind holes of a work piece with metals, comprising

• bringing into contact the work piece containing cavities, through holes, blind holes or micro blind holes with a metal deposition electrolyte and
• applying a voltage between the work piece and at least one anode such that a current flow is fed to the work piece and a metal deposition completely fills the cavities, through holes, blind holes or micro blind holes, and
• wherein the electrolyte contains a Fe(II)/Fe(III) redox system and the Fe(II) ion concentration is contained at at least 1 g/l and the Fe(III) ion concentration is contained at 7-30 g/l, and wherein the metal deposition predominantly occurs in the cavities, through holes, blind holes or micro blind holes, rather than at the surface of the work piece,
• wherein a first voltage is applied between a first side of the work piece and at least one first anode such that a first pulse reverse current is fed to the first side of the work piece, wherein at least one first forward current pulse and at least one first reverse current pulse flow in each cycle of said first pulse reverse current, a second voltage is applied between a second side of the work piece and at least one second anode such that a second pulse reverse current is fed to the second side of the work piece, wherein at least one second forward current pulse and at least one second reverse current pulse flow in each cycle of said second pulse reverse current.