The invention relates to a strip detector and a process for producing a strip detector for detecting ionising particles and/or radiation. Said strip detector has a silicon substrate which provides mutually spaced n-doped regions and therebetween a p-doped insulation region at least on a substrate surface in the form of strips and voltage supply regions, and a first insulation layer applied to a substrate surface, and metal strips arranged above the n-doped regions. The invention is characterised in that directly above the first insulation layer at least one other insulation layer is provided, and that at least one of the insulation layers is interrupted, in projection over the region, between two adjacent n-doped regions, and the p-doped insulation region has a lateral p-doping agent concentration distribution which provides in the region below the interruption of the interrupted insulation layer a higher doping agent concentration than in the insulation regions directly adjoining the n-doped regions.