An insulating glazing unit, comprising at least two panes and at least one spacer, which has two pane contact surfaces, which run parallel to one another,
- wherein a first pane contact surface is connected to a first pane of the at least two panes via a sealant and a second pane contact surface is connected to a second pane of the at least two panes via a sealant such that a glazing interior space and a glazing exterior space are formed,
- wherein at least one pane of the first and second panes is provided on a side facing the glazing interior space at least partially with an electrically conductive coating and/or an electrically controllable functional element and two bus bars are provided for electrically contacting the electrically conductive coating and/or the electrically controllable functional element,
- wherein a bus bar of the two bus bars comprises an electrically conductive adhesive tape,
- wherein the electrically conductive adhesive tape comprises an electrically conductive adhesion layer, a conductor track, and an opaque, electrically insulating cover
- wherein the electrically conductive adhesive tape is connected via the electrically conductive adhesion layer to the electrically conductive coating and/or to the electrically controllable functional element.